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<\/p>\nControl and Correction of Stainless Steel Welding Deformation_Word Document Online Reading and Download_Document Network<\/p>\n
After the stainless steel is welded, as long as it is placed flat, warping and deformation will directly occur on the surface of the plate, resulting in a rework rate of 30% in the workshop. Regarding the problem of deformation, control measures can save more costs than corrective measures.<\/p>\n
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According to industry data in 2026, the argon arc welding current is reduced from 200A to 160A, and the heat input is reduced from 180J\/mm to 120J\/mm. As a result, the warpage of the plate is directly reduced by half. In actual operations, the welding speed was increased from 8mm\/s to 12mm\/s. Four-layer welding was used instead of the previous two-layer welding. The heat dissipated very quickly and the residual stress was relatively small.<\/p>\n
A precision equipment factory in Shanghai successfully reduced the welding flatness deviation of 316L plates with a thickness of 3mm from the original 1.2mm to 0.4mm after recalibrating the TIG parameters in 2025. This change directly eliminated the entire subsequent correction process, ultimately reducing the cost of a single piece by eight yuan.<\/p>\n
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Before welding begins, specially customized fixtures are used to forcibly lock the four corners of the workpiece, and then two riding supports are added to the middle part. In this way, the overall rigidity is greatly increased, and the shape changes caused by thermal expansion and contraction are directly resisted by these supports. A factory in Suzhou that produces kitchen utensils changed the tooling in early 2026. After the welding operation and completion of the side welds with a length of 500mm, It can be placed directly on the flat ground, and there is no need to go to the correction workbench for correction.<\/p>\n
The support point should not be pressed directly under the weld, and a distance of more than 20mm needs to be left. Otherwise, after cooling, there will be a local depression at the support point. This will lead to new deformation risks.<\/p>\n
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For straight welds longer than 300 mm, operators must not choose to weld them all in one go. Instead, split it into sections every 150mm, and weld sections every other distance. The specific operating specifications are that a certain section must be welded first, and then allowed to cool naturally for two minutes before welding the next section.<\/p>\n
A stainless steel pipe factory in Guangzhou achieved very significant results after adjusting its production process according to this method. The ovality deviation of the factory's product pipe body has been reduced from the original 0.8 mm to 0.3 mm, while the straight-through rate has also increased to 97%.<\/p>\n
For symmetrical welds, you must use the gun symmetrically. Weld in the middle first and then move back to both sides, alternating left and right. Don't let the heat only accumulate on one side, otherwise the entire board will tilt to one side.<\/p>\n
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After the welding is completed and left to cool to normal temperature, the deformation value should be within the range of 0.5 mm. Then use a two-ton hydraulic jack to align the concave part for support, and then slowly increase the pressure to 1.5 MPa, and maintain this state for a full thirty seconds. Control and Correction of Stainless Steel Welding Deformation_Word Document Online Reading and Download_Document Network, and then perform the loosening operation. According to an actual case report from a local machinery manufacturing factory in Nanjing in 2025, this treatment method was used to repair a 430 grade stainless steel plate with a thickness of two millimeters, and finally successfully restored the flatness of the plate to the specific index level of 0.2 mm.<\/p>\n
If you find that the amount of deformation exceeds 1 mm, then you should not push harder. You need to use a press to flatten this thing first, and then make minor adjustments. If you insist on a hard top, it will be very easy to cause cold deformation cracks in the base material. Especially austenitic steel like 304 is particularly sensitive.<\/p>\n
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Deformed and convex parts need to be heated with an oxyacetylene flame. The target temperature for heating is 650\u00b0C. Use a thermometer to keep an eye on it while heating to ensure that the temperature never exceeds 700\u00b0C. This is because once this temperature is exceeded, grain coarsening will occur.<\/p>\n
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When the heating operation is completed, you need to get a wet cloth to press it to achieve a rapid cooling effect. After the convex part shrinks, it will rebound and eventually become a flat state. There is a manufacturer in Wenzhou that relied on this operation method to successfully correct the 1.5mm plate to a standard level within 0.1mm in 2026.<\/p>\n
The heating position must be kept at least 25 mm away from the weld to avoid secondary stress concentration. After waiting for cooling, you need to use sandpaper to polish and brighten the surface, and then carefully check whether there are new cracks. Once new cracks are found, the machine<\/strong> must be stopped immediately and re-evaluated and processed.<\/p>\n \n There are oxidized colors and micro-deformation residues on the corrected surface. To control the welding deformation of stainless steel processing<\/strong> in 2026, the industry often uses a mixture of 10% nitric acid and 2% hydrofluoric acid for treatment. The workpiece is soaked for four minutes, taken out and rinsed, so that the surface can return to silvery white.<\/p>\n As for the electrochemical polishing process, the current density is controlled at a level of 15 amperes per square meter and the duration is two minutes. After this treatment, the roughness can reach the value of Ra0.2.<\/p>\n Chemical treatment can actually only solve some superficial conditions and flatness problems at the micro level. But it definitely cannot replace those mechanical and thermal correction methods. Therefore, the order here is always to use mechanical means first, then carry out heat treatment, and finally do the finishing work through chemical means. Please do not skip any of the steps casually.<\/p>\n After you have completed the welding operation on stainless steel in the workshop, you have to control the welding deformation of stainless steel<\/strong> . Which deformation situation gives you the most headache and trouble? Everyone is welcome to communicate and discuss in the comment area. If you find this content useful. Please remember to use the like feature. Please also kindly forward this good news to your colleagues and friends.<\/p>","protected":false},"excerpt":{"rendered":" Provide online reading and free download of the word document on the control and correction of stainless steel welding deformation. Summary: Control and Correction of Stainless Steel Welding Deformation During the stainless steel welding process, heat will be generated, leading to deformation. Therefore, it is very important to control and correct stainless steel welding deformation. 1<\/p>","protected":false},"author":1,"featured_media":2668,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[2329,2330,2331,619,1197],"class_list":["post-2667","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-machining","tag-control","tag-correction","tag-mechanical-correction","tag-stainless-steel","tag-welding-deformation"],"_links":{"self":[{"href":"https:\/\/endlfh.com\/ja\/wp-json\/wp\/v2\/posts\/2667","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/endlfh.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/endlfh.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/endlfh.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/endlfh.com\/ja\/wp-json\/wp\/v2\/comments?post=2667"}],"version-history":[{"count":0,"href":"https:\/\/endlfh.com\/ja\/wp-json\/wp\/v2\/posts\/2667\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/endlfh.com\/ja\/wp-json\/wp\/v2\/media\/2668"}],"wp:attachment":[{"href":"https:\/\/endlfh.com\/ja\/wp-json\/wp\/v2\/media?parent=2667"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/endlfh.com\/ja\/wp-json\/wp\/v2\/categories?post=2667"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/endlfh.com\/ja\/wp-json\/wp\/v2\/tags?post=2667"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} Pickling and electrochemical polishing finishing<\/h2>\n<\/p>\n