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Welding method of stainless steel composite plate

A welding method and stainless steel technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problem of reduced corrosion resistance of welded joints, and achieve the effect of improving the quality of welded joints, reducing dilution, and good metallurgical treatment effect.

Pending Publication Date: 2022-01-04
唐禹明
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Problems solved by technology

The dilution of the multi-layer weld and the diffusion of carbon to the multi-layer will greatly reduce the corrosion resistance of the welded joint

Method used

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  • Welding method of stainless steel composite plate

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Embodiment Construction

[0018] The invention will be further described below through the embodiments in conjunction with the accompanying drawings.

[0019] The welding method of the stainless steel composite plate of the present invention, taking stainless steel as the clad layer and low alloy steel as the base layer of the stainless steel clad plate as an example, the embodiment of the present invention is described, the clad layer of the stainless steel clad plate is 06Cr13Al, and the thickness is 3mm; the base layer It is Q345R, the thickness is 22mm, the welding of this stainless steel clad plate adopts the following steps:

[0020] 1) Groove processing: The groove is processed by machining, and the compound layer is processed down 1~2mm, and the width is about 2mm from the edge of the groove to both sides, and the compound layer side is processed downward based on the boundary line between the compound layer and the base layer. Concave, such as figure 1 As shown; the groove form with a concave...

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Abstract

The invention relates to a welding method of a stainless steel composite plate and belongs to welding methods. The welding method is realized by the following steps that a groove is machined, and a composite layer side is downwards machined by taking a boundary between a composite layer and a base layer as a reference to form a concave table; when a welding joint of the composite plate is assembled, the unfitness of butt joint is controlled to 0.5-1.5 mm; the base layer is welded through automatic submerged arc welding, and a welding bead is 1 mm lower than the boundary between the composite layer and the base layer; and a transition layer and the composite layer are both welded through stainless steel flux-cored wire CO2 gas shielded welding. According to the welding method, assembly deviation is strictly controlled, when the base layer and the transition layer are welded, the height of a welding seam can be well controlled, the fusion ratio can be controlled, carbon diffusion is effectively restrained, dilution of base layer base metal to the composite layer is reduced, embrittlement and cracks of a fusion area are avoided, and the quality of the welding joint is improved; and when the transition layer and the composite layer are welded, stainless steel flux-cored wire CO2 gas shielded welding is adopted, semi-automatic and full-automatic welding is achieved, and the welding efficiency is improved by 3-4 times.

Description

technical field [0001] The invention belongs to a welding method, in particular to a welding method of a stainless steel clad plate. Background technique [0002] The welding procedure of stainless steel clad plate is complicated and difficult. Carbon migration will occur in the transition zone during welding, and carbon will migrate from the low-chromium base layer to the chromium-rich stainless steel deposited metal. At the same time the stainless steel cladding is severely diluted. At this time, a high-hardness carburization zone and a low-hardness decarburization zone are formed at the junction of the base layer and the cladding layer, causing embrittlement and cracks in the fusion zone. The dilution of the multi-layer weld and the diffusion of carbon to the multi-layer will greatly reduce the corrosion resistance of the welded joint. Contents of the invention [0003] The invention aims at overcoming the deficiencies of the prior art, and provides a welding method f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/18B23K9/235B23K9/02
CPCB23K9/16B23K9/18B23K9/235B23K9/02
Inventor 唐禹明马相伟张昊宇于文忠赵恩雄
Owner 唐禹明
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