{"id":64046,"date":"2025-11-01T12:48:06","date_gmt":"2025-11-01T11:48:06","guid":{"rendered":"https:\/\/spawlab.pl\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/"},"modified":"2025-11-01T22:07:40","modified_gmt":"2025-11-01T21:07:40","slug":"how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox","status":"publish","type":"post","link":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/","title":{"rendered":"How to Repair Excavators? Welding S690QL and Hardfacing Hardox"},"content":{"rendered":"<div class=\"container mx-auto max-w-3xl p-6 lg:p-12 bg-white shadow-lg rounded-lg my-10\">\n<p>An excavator failure on a construction site is a crisis scenario. Every hour of machine downtime generates enormous costs. Most often, mechanical failures concern two areas: fatigue cracks in load-bearing structures (booms, arms) and extreme wear of working implements (buckets, blades).  <\/p>\n<p>In both cases, time pressure often leads to decisions with catastrophic consequences. Repairing a cracked boom is treated like routine welding of standard S355 steel, and bucket reclamation consists of improperly tacking it with any available electrode. <\/p>\n<p>This approach is a direct path to another, even more-severe failure.<\/p>\n<p>Excavator structures are made of specialty steels: high-strength (e.g., <strong>S690QL<\/strong>) and wear-resistant (e.g., <strong>Hardox 500<\/strong>). These materials owe their properties to advanced heat treatment and chemical composition. Their welding is a <strong>special process<\/strong> that requires a strict technological regime, not improvisation.  <\/p>\n<p>In this article, based on standards and engineering experience, we will analyze why these steels are so demanding and how to, step-by-step, develop a qualified Welding Procedure Specification (WPS) that guarantees a safe and durable repair.<\/p>\n<p><!-- Sekcja 1 --><\/p>\n<h2><\/h2>\n<h2>Why is Excavator Repair a Special Process? A Material Analysis <\/h2>\n<p>The foundation of any professional repair is a deep understanding of the material being worked on. S690QL and Hardox 500 steels are fundamentally different from common S355 steel. <\/p>\n<h3>Problem No. 1: The Boom \u2013 High-Strength S690QL Steel<\/h3>\n<p>Excavator booms and arms must transfer massive dynamic loads while maintaining the lowest possible dead weight. Therefore, they are constructed from high-strength, Quenched &amp; Tempered (Q&amp;T) steels, such as <sub>S690QL<\/sub>. They are characterized by a minimum yield strength (Re) of 690 MPa and guaranteed impact toughness even at low temperatures (down to -40\u00b0C).  <\/p>\n<p>The key challenge is their limited weldability, primarily determined by the risk of cold cracking <strong>(hydrogen-induced cracking).<\/strong><\/p>\n<h3 class=\"mt-8 border-t pt-4\">In-depth Metallurgical Analysis of S690QL<\/h3>\n<h4>Carbon Equivalents: <sub>Ce<\/sub>, <sub>Pcm<\/sub>, and CEN<\/h4>\n<p>The primary indicator of weldability is the carbon equivalent. The most commonly cited formula is the IIW formula: <\/p>\n<p><!-- Wz\u00f3r zast\u0105piony czystym HTML\/Tekstem --><\/p>\n<div class=\"formula\">C<sub>e<\/sub> = %C + (%Mn \/ 6) + (%Cr + %Mo + %V) \/ 5 + (%Ni + %Cu) \/ 15<\/div>\n<p>For S690QL steel, the Ce value often exceeds 0.55\\%, classifying it as susceptible to cracking. However, it must be noted that for modern Q&amp;T steels, which are low-carbon and contain micro-alloys (Nb, V, Ti, B), this formula can be insufficient. A better correlation with hydrogen cracking susceptibility is often shown by the Pcm (Ito-Bessyo) or CEN equivalents, which place greater emphasis on carbon and micro-alloying elements that strongly influence hardenability even at very low concentrations.  <\/p>\n<h4>The Key Parameter: Cooling Time t8\/5<\/h4>\n<p>Preheating and interpass temperature control are merely tools for controlling the key metallurgical parameter: the cooling time t8\/5 (the time it takes for the joint to cool from 800\u00b0C to 500\u00b0C).<\/p>\n<ul>\n<li>An excessively short t8\/5 (e.g., welding without preheat, low heat input): Results in a 100% martensitic structure in the Heat-Affected Zone (HAZ), characterized by very high hardness (&gt;&gt;400-450 HV) and extreme sensitivity to hydrogen cracking.<\/li>\n<li>An excessively long t8\/5 (e.g., too high preheat or interpass temperature, excessive heat input): Causes softening (degradation) of the HAZ. This leads to over-tempering or even transformation into upper bainite\/ferrite, which drastically reduces the yield strength (Re) and impact toughness of the joint. We then lose the primary advantage of S690QL steel \u2013 its strength.  <\/li>\n<\/ul>\n<h4>The Role of Hydrogen and the Cracking Mechanism<\/h4>\n<p>Preheating (e.g., to 120-150\u00b0C) has two fundamental metallurgical objectives, beyond simply drying the joint:<\/p>\n<ol>\n<li>Structural Objective: To slow the cooling rate (extend t8\/5) to avoid the formation of an exclusively brittle, untempered martensite in favor of more ductile structures.<\/li>\n<li>Diffusive Objective: To drastically increase the diffusion coefficient of hydrogen in the steel. The elevated temperature allows hydrogen (from consumables, moisture, paint) to effuse (escape) from the joint before the steel cools below the Ms (martensite start) temperature. Below this temperature, hydrogen becomes trapped in the crystal lattice, migrates to areas of triaxial stress (e.g., notches, inclusions), and causes cracking.  <\/li>\n<\/ol>\n<p>For very thick sections or in difficult conditions, a post-weld hydrogen bake-out (e.g., at 250\u00b0C for 2-3 hours) should be considered to assist hydrogen removal.<\/p>\n<h3>Problem No. 2: The Bucket \u2013 Wear-Resistant Hardox 500 Steel<\/h3>\n<p>\u0141y\u017cki, lemiesze i z\u0119by pracuj\u0105 w bezpo\u015brednim kontakcie z gruntem, ska\u0142ami czy kruszywem. Musz\u0105 by\u0107 odporne na \u015bcieranie (abrazj\u0119) i udary. <\/p>\n<ul>\n<li>Buckets, blades, and teeth are in direct contact with soil, rocks, or aggregates. They must be resistant to abrasion and impact. <\/li>\n<li>Characteristics: Hardox 500 is a martensitic steel, through-hardened to a hardness of approx. 500 HBW.\n<ol>\n<li>Welding Challenge: Although Hardox is designed to be weldable, it carries two risks:Softening in the HAZ: An excessive amount of heat input (high linear energy) leads to the &#8220;tempering&#8221; of the material in the welding zone, causing it to lose its hardness and wear resistance.<\/li>\n<li>Weld Overlay Cracking: Applying very hard (and brittle) reclamation layers directly onto the hard substrate generates immense stresses, leading to disbonding and cracking of the hardfacing layer.<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n<p><!-- Sekcja 2 --><\/p>\n<h2><\/h2>\n<h2>Case Study 1: Repair of a Cracked Boom (S690QL Steel)<\/h2>\n<p>The repair of a fatigue crack in such a critical component must be carried out according to a strict procedure.<\/p>\n<h3>Step 1: Diagnosis and Joint Preparation<\/h3>\n<p>This is a critical stage; neglecting it nullifies the entire effort.<\/p>\n<ol>\n<li>Locate the Crack: The crack must be located along its entire length. It is essential to use Non-Destructive Testing (NDT), such as Magnetic Particle Testing (MT) or Penetrant Testing (PT), to find its tips. <\/li>\n<li>Arrest Propagation: At both ends of the crack, &#8220;stop-holes&#8221; must be drilled.\n<p class=\"mt-2 text-sm italic text-gray-600\">Justification (Fracture Mechanics): This isn&#8217;t &#8220;magic.&#8221; Drilling a hole at the crack tip increases its tip radius (\u03c1). According to fracture mechanics principles, this drastically lowers the local stress intensity factor KI below the critical value (KIc), physically arresting further propagation.  <\/p>\n<\/li>\n<li>Remove the Defect: The entire crack must be removed mechanically (grinding) or thermally (arc-air gouging).<\/li>\n<li>Beveling: A weld groove (e.g., V, Y, X) must be prepared to guarantee a full penetration weld through the entire thickness of the component.<\/li>\n<li>Cleanliness: The weld area (min. 25 mm on each side) must be absolutely clean \u2013 free of rust, paint, grease, oils, and moisture. This is a crucial method in the fight against hydrogen. <\/li>\n<\/ol>\n<h3>Krok 2: Opracowanie WPS (Instrukcja Technologiczna Spawania)<\/h3>\n<p>Welding S690QL without a qualified WPS (e.g., compliant with PN-EN ISO 15614-1) is unacceptable. Thermal parameters are key. <\/p>\n<ul>\n<li>Method Selection: Under workshop conditions, the optimal method is MAG (135). It provides high productivity, metallurgical purity, and low hydrogen content. However, it requires high-class equipment capable of stable operation, such as modern <a href=\"https:\/\/spawlab.pl\/en\/category-product\/used\/mig-mag-en\/\">MAG inverter welding machines<\/a>.  <\/li>\n<li>Preheat Tp: MANDATORY. As explained in the metallurgical analysis, a temperature of 120-150\u00b0C is necessary to control the t8\/5 time and allow hydrogen effusion.<\/li>\n<li>Interpass Temperature Ti: CONTROLLED. The temperature of the component between successive passes must not exceed 250\u00b0C to avoid HAZ degradation (softening) and loss of strength.<\/li>\n<\/ul>\n<h3 class=\"mt-8 border-t pt-4\">Consumable Selection Strategy: Overmatching vs. Undermatching<\/h3>\n<p>The choice of filler material is a key strategic decision. It must be low-hydrogen (H5 or H4). <\/p>\n<ul>\n<li><strong>&#8220;Overmatching&#8221; (Overstrength) strategy:<\/strong> This involves using a binder with a strength equal to or higher than the S690QL material (<sub>Re<\/sub> \u2265 690 MPa). This guarantees full restoration of bearing capacity, but has disadvantages: it generates higher residual stresses and is more susceptible to hydrogen cracking. It requires absolute control of conditions.  <\/li>\n<li>&#8220;Undermatching&#8221; Strategy (RECOMMENDED): This is a textbook example of a safe repair strategy. We intentionally use a &#8220;weaker&#8221; consumable, but one that is extremely ductile and crack-resistant, such as an austenitic <a href=\"https:\/\/spawlab.pl\/en\/category-product\/accessories-parts\/accessories\/welding-wire\/?s=THERMANIT X&#038;post_type=product&#038;dgwt_wcas=1\">Thermanit X<\/a> solid wire (Type 18 8 Mn, Re&gt; 370 MPa). This material acts as a &#8220;ductile fuse&#8221;: its purpose is to safely compensate for stresses and strains between the hard HAZ regions of the S690QL material, drastically minimizing the risk of cold cracking.  <\/li>\n<\/ul>\n<h3>Step 3: Welding and Post-Weld Treatment<\/h3>\n<p>Welding technique also matters. A multi-pass technique should be used, applying beads symmetrically or using a backstep method to minimize stresses. <\/p>\n<p>After welding is complete, the repaired area must not be allowed to cool rapidly. It should be covered with thermal blankets to ensure slow, uniform cooling. This is the final step in controlling stresses and cracking.  <\/p>\n<h3 class=\"mt-8 border-t pt-4\">Prohibition of Post-Weld Heat Treatment (PWHT) for Q&amp;T Steels<\/h3>\n<p>It must be categorically stated that, unlike S355 steel, S690QL steel must not be subjected to standard Post-Weld Heat Treatment (PWHT), e.g., at 600\u00b0C. This steel owes its properties to the Quenching and Tempering (Q&amp;T) process. Performing another heat treatment in this range (PWHT) would cause &#8220;over-tempering&#8221; of the base material and HAZ. This would lead to a catastrophic and irreversible loss of yield strength (e.g., down to 500 MPa), destroying the structure. This justifies why we are reliant on mechanical methods (peening) for stress reduction in these repairs.    <\/p>\n<p><!-- Sekcja 3 --><\/p>\n<h2><\/h2>\n<h2>Case Study 2: Reclamation of a Worn Bucket (Hardox 500 Steel)<\/h2>\n<p>Bucket reclamation is not about applying a single, universal hard layer. Different zones of the bucket are subject to different wear mechanisms (tribological analysis): <\/p>\n<ul>\n<li>Bucket Shell: Dominated by abrasive wear (abrasion) from particulate matter (sand, gravel). This requires maximum surface hardness. <\/li>\n<li>Blade and Corners: Subject to impact wear (impact) combined with abrasion. This requires high impact toughness and the ability to work-harden. <\/li>\n<\/ul>\n<h3>Hardfacing Technology: The Layer-by-Layer Principle<\/h3>\n<p>The biggest mistake is to hardface directly onto the Hardox substrate with a very hard electrode (e.g., 65 HRC). Such a deposit is extremely brittle and will almost certainly spall or crack under stress. <\/p>\n<h4>Key Phenomenon: Dilution<\/h4>\n<p>It must be understood that the layers are not perfectly distinct. When we apply the first hard layer (e.g., a high-chromium Fe-Cr-C) onto a soft, ductile buffer layer (e.g., austenitic Thermanit X), they mix in the weld pool (dilution). As a result, the first hard layer will never achieve its full 63 HRC hardness. It will be &#8220;diluted&#8221; by the buffer material, making it softer (e.g., 45-50 HRC). Only the second (and sometimes third) hardfacing layer, deposited on the previous one, will achieve the target properties and chemical composition.    <\/p>\n<p>Proper reclamation is a multi-layer process:<\/p>\n<p>Step 1: Buffer Layer<br \/>\nIts job is to create a soft, ductile &#8220;cushion&#8221; between the hard substrate (Hardox) and the brittle top layer. The buffer absorbs mechanical stresses and compensates for strains. <\/p>\n<ul>\n<li>Material: High-ductility materials are used, e.g., austenitic steels (like <a href=\"https:\/\/spawlab.pl\/en\/category-product\/accessories-parts\/accessories\/welding-wire\/?s=THERMANIT X&#038;post_type=product&#038;dgwt_wcas=1\">Thermanit X<\/a>, type W 18 8 Mn).\n<p class=\"mt-2 text-sm italic text-gray-600\">Justification (Physics): The buffer does more than absorb mechanical stress. It also compensates for the mismatch in coefficients of thermal expansion (\u03b1) between the substrate (Hardox) and the hardfacing layer (Fe-Cr-C). Without a buffer, the differential shrinkage during cooling guarantees relaxation cracking and disbonding (delamination) of the hard layer.  <\/p>\n<\/li>\n<li>Mistake: Using ordinary non-alloy steel (e.g., G3Si1 wire) as a buffer is unacceptable. It lacks sufficient strength and will &#8220;collapse&#8221; under the hard overlay.<\/li>\n<\/ul>\n<p>Step 2: Hardfacing Layers (Top Coats)<br \/>\nThe choice of top material depends on the location on the bucket:<\/p>\n<ul>\n<li>For the Shell (Abrasion): Iron-based alloys with high chromium and carbon content (Fe-Cr-C), such as <a href=\"https:\/\/spawlab.pl\/en\/category-product\/accessories-parts\/accessories\/welding-wire\/?s=WEARCORE XD63 0&#038;post_type=product&#038;dgwt_wcas=1\">WEARcore XD 63-0<\/a> cored wires. They form a structure containing very hard, primary chromium carbides (M7C3) in a softer matrix. <\/li>\n<li>For the Blade (Impact): Austenitic manganese steels (Hadfield type, approx. 13\\% Mn), e.g.,<a href=\"https:\/\/spawlab.pl\/en\/category-product\/accessories-parts\/accessories\/welding-wire\/?s=WEARCORE MNCR13 0&#038;post_type=product&#038;dgwt_wcas=1\"> WEARcore MnCr13-O.<\/a>  )\n<p class=\"mt-2 text-sm italic text-gray-600\">The Hadfield Steel Phenomenon: This material has a low initial hardness (~205 HBW) but is characterized by a low stacking fault energy (SFE). Under impact (deformation), it undergoes rapid work-hardening via TWIP (Twinning Induced Plasticity) or even TRIP (Transformation Induced Plasticity, \u03b3 \u2192 \u03b1&#8217;) mechanisms. The surface hardness increases to &gt;500 HBW, while the core remains ductile and impact-resistant.  <\/p>\n<\/li>\n<\/ul>\n<h3>Hardfacing Procedure and Parameters<\/h3>\n<p>The most common methods used for hardfacing are MMA (111) or FCAW (Flux-Cored Arc Welding), utilizing specialized self-shielded cored wires (UTP).<\/p>\n<ul>\n<li>Preheating: Hardox also requires preheating (75-175\u00b0C depending on thickness) to prevent cracking.<\/li>\n<li>Technique: Overheating must be avoided. Use short, straight beads or a backstep technique to minimize thermal stress. <\/li>\n<li>Cooling: As with S690QL, the component must cool slowly after hardfacing, preferably covered with thermal blankets.<\/li>\n<\/ul>\n<p><!-- NOWA SEKCJA - \u017bYWOTNO\u015a\u0106 ZM\u0118CZENIOWA --><\/p>\n<h2><\/h2>\n<h2>Restoration of Fatigue Life: The Key to Boom Durability<\/h2>\n<p>Boom cracks are almost always fatigue failures. A weld repair, even if metallurgically perfect, introduces two factors that dramatically reduce the joint&#8217;s fatigue life: <\/p>\n<ol>\n<li>Residual Stresses: Tensile residual stresses in the weld and HAZ add to the operational stresses, extremely accelerating the initiation of new fatigue cracks.<\/li>\n<li>Geometric Notch: The abrupt transition between the weld face and the base material (even minor undercut or excessive reinforcement) acts as a powerful stress concentrator.<\/li>\n<\/ol>\n<p>Therefore, a static repair is not enough. The fatigue life must be restored. According to IIW (International Institute of Welding) guidelines, post-weld treatment techniques must be applied:  <\/p>\n<ul>\n<li>Grinding \/ Profile Dressing: The simplest method, involving grinding the weld flush with the base material to remove the geometric notch.<\/li>\n<li>TIG Dressing: Remelting the weld toes with a TIG arc to create a smooth, gradual transition and eliminate micro-cracks.<\/li>\n<li>Hammer Peening or Shot Peening: The most effective methods, which involve mechanically introducing beneficial compressive stresses into the weld zone. These compressive stresses cancel out the harmful tensile stresses, extending the fatigue life of the repaired component many times over. <\/li>\n<\/ul>\n<p><!-- NOWA SEKCJA - ALTERNATYWY --><\/p>\n<h2><\/h2>\n<h2>Alternative (Non-Welding) Repair Methods<\/h2>\n<p>A true engineering analysis must also consider approved repair techniques that do not rely on welding, especially in the context of fatigue cracks.<\/p>\n<h4>Method 1: &#8220;Blend-out&#8221; (Grinding)<\/h4>\n<p>For shallow, incipient fatigue cracks. This method involves grinding out the crack completely, down to its root, creating a very smooth, polished groove. This removes the stress concentrator without introducing welding stresses. However, this method is limited to very early-stage damage.   <\/p>\n<h4>Method 2: Reinforcement Plates (&#8220;Doublers&#8221;)<\/h4>\n<p>A common field repair method involving &#8220;bridging&#8221; the repaired area. An external, properly designed reinforcement plate (a doubler) is affixed (e.g., with bolts or a peripheral weld away from the crack) to transfer loads &#8220;over&#8221; the damaged area, thus relieving the crack. <\/p>\n<p><!-- Sekcja 4 --><\/p>\n<h2><\/h2>\n<h2>Quality Control and Economic Analysis \u2013 Is It Worth It?<\/h2>\n<p>A professional weld repair is a complex process. Is it worth the cost? <\/p>\n<h3>Quality Control is Mandatory<\/h3>\n<p>The developed WPS must be verified by Destructive Testing (DT) on test coupons (per ISO 15614-1), including tensile tests, bend tests, hardness surveys (critical for the HAZ), and impact tests.<\/p>\n<p>Every completed repair must undergo Non-Destructive Testing (NDT):<\/p>\n<ul>\n<li>VT (Visual): Assessment of weld geometry.<\/li>\n<li>MT\/PT (Magnetic Particle\/Penetrant): Crucial for detecting surface cracks (cold cracks).<\/li>\n<li>UT (Ultrasonic): Essential to confirm full penetration in the boom&#8217;s butt joints.<\/li>\n<li>CRITICAL TIMING OF NDT: Cold (hydrogen) cracking is a delayed phenomenon. Hydrogen needs time to diffuse. Therefore, NDT (especially MT\/PT) to detect cold cracks must be performed no earlier than 24-48 hours after welding is complete and the component has fully cooled. A test performed immediately may yield a false negative result.   <\/li>\n<\/ul>\n<h3>The Harsh Reality: Downtime Cost vs. Repair Cost <\/h3>\n<p>Let&#8217;s analyze the real cost of a boom failure on a 20-ton excavator.<\/p>\n<blockquote class=\"bg-gray-50 p-6 rounded-lg\">\n<p class=\"font-semibold text-lg text-gray-800\">Scenario A: Replacement with a New Component<\/p>\n<ul>\n<li>Cost of new boom: ~ 65,000 PLN<\/li>\n<li>Lead time and installation: ~ 5 business days (40 hours)<\/li>\n<li>Downtime cost (assuming 200 PLN\/hr rate): 40h * 200 PLN = 8,000 PLN<\/li>\n<li><strong>Total Cost (Scenario A): 73,000 PLN<\/strong><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p class=\"font-semibold text-lg text-gray-800\">Scenario B: Professional Weld Repair (WPS-compliant)<\/p>\n<ul>\n<li>Repair cost (labor, materials, NDT, post-treatment): ~ 7,000 PLN<\/li>\n<li>Repair time: ~ 2 business days (16 hours)<\/li>\n<li>Downtime cost: 16h * 200 PLN = 3,200 PLN<\/li>\n<li><strong>Total Cost (Scenario B): 10,200 PLN<\/strong><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p class=\"font-semibold text-lg text-gray-800\">Scenario C: &#8220;Guerilla&#8221; Repair (Non-compliant)<\/p>\n<ul>\n<li>Apparent cost (welder + rutile electrodes): ~ 1,400 PLN<\/li>\n<li>Result: Catastrophic failure in the HAZ after a few hours of operation (brittle fracture due to lack of preheat, wrong consumable).<\/li>\n<li>Actual Cost: Cost of Scenario A (replacement, 73,000 PLN) + secondary costs (e.g., damaged hydraulic cylinder) + loss of reputation.<\/li>\n<\/ul>\n<\/blockquote>\n<p>The conclusion is unequivocal: This analysis shows that a professional repair (Scenario B) is not just &#8220;cheaper&#8221; than replacement (Scenario A), but it is the only rational alternative, protecting against the financial catastrophe of a &#8220;sham repair&#8221; (Scenario C).  <\/p>\n<p><!-- Sekcja 5 - Podsumowanie --><\/p>\n<h2><\/h2>\n<h2>Engineer&#8217;s Conclusion<\/h2>\n<p>Treating excavator weld repair as a special process is not a whim; it is an economic necessity.<\/p>\n<ol>\n<li>High-strength (S690QL) and wear-resistant (Hardox) steels are not standard structural steel. They demand specialized metallurgical knowledge and strict procedural control. <\/li>\n<li>The key to S690QL repair is thermal cycle control (managing the t8\/5 parameter via preheat and Ti) and hydrogen elimination (low-hydrogen consumables, cleanliness, bake-out).<\/li>\n<li>In field repairs, an &#8220;undermatching&#8221; strategy (e.g., with an austenitic wire) is often safer than attempting a full &#8220;overmatching&#8221; strength restoration.<\/li>\n<li>Post-Weld Heat Treatment (PWHT) is strictly prohibited for S690QL steels due to the risk of over-tempering.<\/li>\n<li>Hardfacing requires an understanding of dilution and the use of multi-layer systems (buffer + hard layers) selected for the specific wear mechanism (abrasion vs. impact).<\/li>\n<li>NDT for cold cracks must be delayed (24-48h).<\/li>\n<li>The goal of a boom repair is not just the weld, but the restoration of fatigue life (e.g., by peening).<\/li>\n<li>Investment in knowledge, personnel qualification, and high-quality equipment and <a href=\"https:\/\/spawlab.pl\/en\/category-product\/accessories-parts\/?s=utp&#038;post_type=product&#038;dgwt_wcas=1\">UTP by voestalpine<\/a> welding consumables pays for itself instantly by protecting against the catastrophe of Scenario C.<\/li>\n<li>We must also remember that this work requires strict adherence to safety regulations. Using certified PPE, such as <a href=\"https:\/\/spawlab.pl\/en\/category-product\/accessories-parts\/?s=weldas&#038;post_type=product&#038;dgwt_wcas=1\">Weldas <\/a>protective clothing or professional <a href=\"https:\/\/spawlab.pl\/en\/category-product\/accessories-parts\/accessories\/welding-visors\/?s=optrel&#038;post_type=product&#038;dgwt_wcas=1\">Optrel <\/a>welding helmets, is fundamental to safe operation. <\/li>\n<\/ol>\n<div class=\"container ...\">\n<p class=\"text-lg text-gray-700 italic mb-6\">Jaroslaw Kolaski, M.Sc., IWE <\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<p><!-- \/container --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>An excavator failure on a construction site is a crisis scenario. Every hour of machine downtime generates enormous costs. Most often, mechanical failures concern two areas: fatigue cracks in load-bearing structures (booms, arms) and extreme wear of working implements (buckets, blades). In both cases, time pressure often leads to decisions with catastrophic consequences. Repairing a [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":64044,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[21672],"tags":[21688,21673,21689,21674,21690,21675,21691,21676,21677,21678,21679,21680,21681,21682,21683,21684,21685,21686,21687],"class_list":["post-64046","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides","tag-buffer-layer-cladding","tag-excavator-repair","tag-cost-of-repairing-an-excavator","tag-welding-of-an-excavator-boom","tag-utp-thermanit-x","tag-how-to-weld-s690ql","tag-utp-wearcore","tag-hardox-bucket-regeneration","tag-cladding-hardfacing","tag-welding-of-high-strength-steels","tag-s690ql-weldability","tag-hardox-500-welding","tag-boom-fracture","tag-welding-technology-manual","tag-wps-welding","tag-carbon-equivalent-ce","tag-preheating-for-welding","tag-cold-cracking","tag-welding-of-hadfield-steel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.0 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to Repair Excavators? Welding S690QL and Hardfacing Hardox<\/title>\n<meta name=\"description\" content=\"Professional welding repair of excavators. Learn how to weld high-strength steel S690QL and hardface Hardox. Understand WPS requirements and avoid costly mistakes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Repair Excavators? Welding S690QL and Hardfacing Hardox\" \/>\n<meta property=\"og:description\" content=\"Lider sprzeda\u017cy, Oficjalny Dystrybutor Premium i Serwis na Polsk\u0119 Migatronic, Gys, Voestalpine Bohler Welding. Nowe i u\u017cywane Spawarki, Przecinarki Plazmowe, Kompresory. Mgr in\u017c. Jaros\u0142aw Ko\u0142aski, IWE\" \/>\n<meta property=\"og:url\" content=\"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/\" \/>\n<meta property=\"og:site_name\" content=\"SpawLab - Welding equipment and plasma cutters - store and service\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Spawlab\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-11-01T11:48:06+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-01T21:07:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/spawlab.pl\/wp-content\/uploads\/2025\/11\/Orange-White-Rental-excavator-machine-Facebook-Cover.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1640\" \/>\n\t<meta property=\"og:image:height\" content=\"924\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"spaw-lab\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"spaw-lab\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"14 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/\"},\"author\":{\"name\":\"spaw-lab\",\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/#\\\/schema\\\/person\\\/29c57408c28cb90248767c4a60ca2e4a\"},\"headline\":\"How to Repair Excavators? Welding S690QL and Hardfacing Hardox\",\"datePublished\":\"2025-11-01T11:48:06+00:00\",\"dateModified\":\"2025-11-01T21:07:40+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/\"},\"wordCount\":2818,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/spawlab.pl\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/Orange-White-Rental-excavator-machine-Facebook-Cover.png\",\"keywords\":[\"buffer layer cladding\",\"excavator repair\",\"cost of repairing an excavator\",\"welding of an excavator boom\",\"UTP Thermanit X\",\"How to weld S690QL\",\"UTP WEARcore\",\"Hardox bucket regeneration\",\"cladding hardfacing\",\"welding of high-strength steels\",\"S690QL weldability\",\"Hardox 500 welding\",\"boom fracture\",\"Welding Technology Manual\",\"WPS welding\",\"carbon equivalent Ce\",\"preheating for welding\",\"cold cracking\",\"welding of Hadfield steel\"],\"articleSection\":[\"Guides\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/spawlab.pl\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/\",\"url\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/\",\"name\":\"How to Repair Excavators? Welding S690QL and Hardfacing Hardox\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/spawlab.pl\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/Orange-White-Rental-excavator-machine-Facebook-Cover.png\",\"datePublished\":\"2025-11-01T11:48:06+00:00\",\"dateModified\":\"2025-11-01T21:07:40+00:00\",\"description\":\"Professional welding repair of excavators. Learn how to weld high-strength steel S690QL and hardface Hardox. Understand WPS requirements and avoid costly mistakes.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/#primaryimage\",\"url\":\"https:\\\/\\\/spawlab.pl\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/Orange-White-Rental-excavator-machine-Facebook-Cover.png\",\"contentUrl\":\"https:\\\/\\\/spawlab.pl\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/Orange-White-Rental-excavator-machine-Facebook-Cover.png\",\"width\":1640,\"height\":924},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Strona g\u0142\u00f3wna\",\"item\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"How to Repair Excavators? Welding S690QL and Hardfacing Hardox\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/\",\"name\":\"Spawlab.pl Lider - Spawarki, Przecinarki Plazmowe, Kompresory\",\"description\":\"Urz\u0105dzenia spawalnicze i Przecinarki plazmowe\\\/ nowe i u\u017cywane \\\/ Profesjonalny serwis\",\"publisher\":{\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/#organization\"},\"alternateName\":\"Spawlab.pl - Dystrybutor Premium i Serwis na Polske Migatronic, Gys, Voestalpine Bohler Welding\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Organization\",\"Place\"],\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/#organization\",\"name\":\"Spawlab.pl\",\"url\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/\",\"logo\":{\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/#local-main-organization-logo\"},\"image\":{\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/#local-main-organization-logo\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/Spawlab\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/spawlab\",\"https:\\\/\\\/www.instagram.com\\\/spawlab.pl\",\"https:\\\/\\\/www.tiktok.com\\\/@spawlab\"],\"description\":\"Lider sprzeda\u017cy, Oficjalny Dystrybutor Premium i Serwis na Polsk\u0119 Migatronic, Gys, Voestalpine Bohler Welding. Nowe i u\u017cywane Spawarki, Przecinarki Plazmowe, Kompresory. Mgr in\u017c. Jaros\u0142aw Ko\u0142aski, IWE\",\"hasMerchantReturnPolicy\":{\"@type\":\"MerchantReturnPolicy\",\"merchantReturnLink\":\"https:\\\/\\\/spawlab.pl\\\/polityka-prywatnosci-2\\\/\"},\"telephone\":[],\"openingHoursSpecification\":[{\"@type\":\"OpeningHoursSpecification\",\"dayOfWeek\":[\"Monday\",\"Tuesday\",\"Wednesday\",\"Thursday\",\"Friday\",\"Saturday\",\"Sunday\"],\"opens\":\"09:00\",\"closes\":\"17:00\"}]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/#\\\/schema\\\/person\\\/29c57408c28cb90248767c4a60ca2e4a\",\"name\":\"spaw-lab\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/d9e2b916898a6170bafbe0febfae51840c1f733ef7d3c6c8b7f4c9301dc8f611?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/d9e2b916898a6170bafbe0febfae51840c1f733ef7d3c6c8b7f4c9301dc8f611?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/d9e2b916898a6170bafbe0febfae51840c1f733ef7d3c6c8b7f4c9301dc8f611?s=96&d=mm&r=g\",\"caption\":\"spaw-lab\"},\"url\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/author\\\/spaw-lab\\\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/spawlab.pl\\\/en\\\/2025\\\/11\\\/01\\\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\\\/#local-main-organization-logo\",\"url\":\"https:\\\/\\\/spawlab.pl\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/olx.jpg\",\"contentUrl\":\"https:\\\/\\\/spawlab.pl\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/olx.jpg\",\"width\":200,\"height\":200,\"caption\":\"Spawlab.pl\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"How to Repair Excavators? Welding S690QL and Hardfacing Hardox","description":"Professional welding repair of excavators. Learn how to weld high-strength steel S690QL and hardface Hardox. Understand WPS requirements and avoid costly mistakes.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/","og_locale":"en_US","og_type":"article","og_title":"How to Repair Excavators? Welding S690QL and Hardfacing Hardox","og_description":"Lider sprzeda\u017cy, Oficjalny Dystrybutor Premium i Serwis na Polsk\u0119 Migatronic, Gys, Voestalpine Bohler Welding. Nowe i u\u017cywane Spawarki, Przecinarki Plazmowe, Kompresory. Mgr in\u017c. Jaros\u0142aw Ko\u0142aski, IWE","og_url":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/","og_site_name":"SpawLab - Welding equipment and plasma cutters - store and service","article_publisher":"https:\/\/www.facebook.com\/Spawlab\/","article_published_time":"2025-11-01T11:48:06+00:00","article_modified_time":"2025-11-01T21:07:40+00:00","og_image":[{"width":1640,"height":924,"url":"https:\/\/spawlab.pl\/wp-content\/uploads\/2025\/11\/Orange-White-Rental-excavator-machine-Facebook-Cover.png","type":"image\/png"}],"author":"spaw-lab","twitter_misc":{"Written by":"spaw-lab","Est. reading time":"14 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/#article","isPartOf":{"@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/"},"author":{"name":"spaw-lab","@id":"https:\/\/spawlab.pl\/en\/#\/schema\/person\/29c57408c28cb90248767c4a60ca2e4a"},"headline":"How to Repair Excavators? Welding S690QL and Hardfacing Hardox","datePublished":"2025-11-01T11:48:06+00:00","dateModified":"2025-11-01T21:07:40+00:00","mainEntityOfPage":{"@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/"},"wordCount":2818,"commentCount":0,"publisher":{"@id":"https:\/\/spawlab.pl\/en\/#organization"},"image":{"@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/#primaryimage"},"thumbnailUrl":"https:\/\/spawlab.pl\/wp-content\/uploads\/2025\/11\/Orange-White-Rental-excavator-machine-Facebook-Cover.png","keywords":["buffer layer cladding","excavator repair","cost of repairing an excavator","welding of an excavator boom","UTP Thermanit X","How to weld S690QL","UTP WEARcore","Hardox bucket regeneration","cladding hardfacing","welding of high-strength steels","S690QL weldability","Hardox 500 welding","boom fracture","Welding Technology Manual","WPS welding","carbon equivalent Ce","preheating for welding","cold cracking","welding of Hadfield steel"],"articleSection":["Guides"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/#respond"]}],"copyrightYear":"2025","copyrightHolder":{"@id":"https:\/\/spawlab.pl\/#organization"}},{"@type":"WebPage","@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/","url":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/","name":"How to Repair Excavators? Welding S690QL and Hardfacing Hardox","isPartOf":{"@id":"https:\/\/spawlab.pl\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/#primaryimage"},"image":{"@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/#primaryimage"},"thumbnailUrl":"https:\/\/spawlab.pl\/wp-content\/uploads\/2025\/11\/Orange-White-Rental-excavator-machine-Facebook-Cover.png","datePublished":"2025-11-01T11:48:06+00:00","dateModified":"2025-11-01T21:07:40+00:00","description":"Professional welding repair of excavators. Learn how to weld high-strength steel S690QL and hardface Hardox. Understand WPS requirements and avoid costly mistakes.","breadcrumb":{"@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/#primaryimage","url":"https:\/\/spawlab.pl\/wp-content\/uploads\/2025\/11\/Orange-White-Rental-excavator-machine-Facebook-Cover.png","contentUrl":"https:\/\/spawlab.pl\/wp-content\/uploads\/2025\/11\/Orange-White-Rental-excavator-machine-Facebook-Cover.png","width":1640,"height":924},{"@type":"BreadcrumbList","@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Strona g\u0142\u00f3wna","item":"https:\/\/spawlab.pl\/en\/"},{"@type":"ListItem","position":2,"name":"How to Repair Excavators? Welding S690QL and Hardfacing Hardox"}]},{"@type":"WebSite","@id":"https:\/\/spawlab.pl\/en\/#website","url":"https:\/\/spawlab.pl\/en\/","name":"Spawlab.pl Lider - Spawarki, Przecinarki Plazmowe, Kompresory","description":"Urz\u0105dzenia spawalnicze i Przecinarki plazmowe\/ nowe i u\u017cywane \/ Profesjonalny serwis","publisher":{"@id":"https:\/\/spawlab.pl\/en\/#organization"},"alternateName":"Spawlab.pl - Dystrybutor Premium i Serwis na Polske Migatronic, Gys, Voestalpine Bohler Welding","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/spawlab.pl\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":["Organization","Place"],"@id":"https:\/\/spawlab.pl\/en\/#organization","name":"Spawlab.pl","url":"https:\/\/spawlab.pl\/en\/","logo":{"@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/#local-main-organization-logo"},"image":{"@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/#local-main-organization-logo"},"sameAs":["https:\/\/www.facebook.com\/Spawlab\/","https:\/\/www.linkedin.com\/company\/spawlab","https:\/\/www.instagram.com\/spawlab.pl","https:\/\/www.tiktok.com\/@spawlab"],"description":"Lider sprzeda\u017cy, Oficjalny Dystrybutor Premium i Serwis na Polsk\u0119 Migatronic, Gys, Voestalpine Bohler Welding. Nowe i u\u017cywane Spawarki, Przecinarki Plazmowe, Kompresory. Mgr in\u017c. Jaros\u0142aw Ko\u0142aski, IWE","hasMerchantReturnPolicy":{"@type":"MerchantReturnPolicy","merchantReturnLink":"https:\/\/spawlab.pl\/polityka-prywatnosci-2\/"},"telephone":[],"openingHoursSpecification":[{"@type":"OpeningHoursSpecification","dayOfWeek":["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"],"opens":"09:00","closes":"17:00"}]},{"@type":"Person","@id":"https:\/\/spawlab.pl\/en\/#\/schema\/person\/29c57408c28cb90248767c4a60ca2e4a","name":"spaw-lab","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/d9e2b916898a6170bafbe0febfae51840c1f733ef7d3c6c8b7f4c9301dc8f611?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/d9e2b916898a6170bafbe0febfae51840c1f733ef7d3c6c8b7f4c9301dc8f611?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/d9e2b916898a6170bafbe0febfae51840c1f733ef7d3c6c8b7f4c9301dc8f611?s=96&d=mm&r=g","caption":"spaw-lab"},"url":"https:\/\/spawlab.pl\/en\/author\/spaw-lab\/"},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/spawlab.pl\/en\/2025\/11\/01\/how-to-repair-excavators-welding-s690ql-and-hardfacing-hardox\/#local-main-organization-logo","url":"https:\/\/spawlab.pl\/wp-content\/uploads\/2022\/01\/olx.jpg","contentUrl":"https:\/\/spawlab.pl\/wp-content\/uploads\/2022\/01\/olx.jpg","width":200,"height":200,"caption":"Spawlab.pl"}]}},"_links":{"self":[{"href":"https:\/\/spawlab.pl\/en\/wp-json\/wp\/v2\/posts\/64046","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spawlab.pl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spawlab.pl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spawlab.pl\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/spawlab.pl\/en\/wp-json\/wp\/v2\/comments?post=64046"}],"version-history":[{"count":2,"href":"https:\/\/spawlab.pl\/en\/wp-json\/wp\/v2\/posts\/64046\/revisions"}],"predecessor-version":[{"id":64050,"href":"https:\/\/spawlab.pl\/en\/wp-json\/wp\/v2\/posts\/64046\/revisions\/64050"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spawlab.pl\/en\/wp-json\/wp\/v2\/media\/64044"}],"wp:attachment":[{"href":"https:\/\/spawlab.pl\/en\/wp-json\/wp\/v2\/media?parent=64046"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spawlab.pl\/en\/wp-json\/wp\/v2\/categories?post=64046"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spawlab.pl\/en\/wp-json\/wp\/v2\/tags?post=64046"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}