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The use of stainless steel pipes is useful in many buildings. Among them, we must be clear about the points of attention in welding. Let's talk about the problems that need to be paid attention to in welding stainless steel pipes.
In the welding process, we should treat the underlying bow cladding differently, and select the appropriate welding materials for welding. In order to ensure the corrosion resistance of the coating, the welding seam composition of the coating should be the same as the composition of the coating steel as much as possible, but at the junction of the two layers, the coating must be diluted by the bottom layer to reduce the corrosion resistance or embrittlement; and the bottom layer. It is alloyed and becomes brittle. Therefore, the key to the welding of stainless steel plates is to handle the welding of the two-layer bordering parts. The treatment method is to set up a transition layer weld between the bottom layer and the cladding layer.
Post-weld heat treatment For welded components of large-thickness stainless steel wrench, post-weld heat treatment can eliminate welding residual stress. However, it should be noted that when the heat treatment temperature is high, the iron cable body will be decarburized on the carbon steel side, which will reduce the progress; while the stainless steel side will be carburized and become hard and brittle, resulting in a reduction in impact toughness and a welded joint. risk of failure, which is undesirable.
Correct heat treatment can eliminate residual welding stress without affecting the corrosion resistance of the coating. The method is as follows: the welded components of the stainless steel plate with a large order or high rigidity to be heat treated should be welded at the bottom layer. The lower holding time can be slightly extended. The post-weld treatment at this temperature can reduce the residual stress by about 40% without affecting the turbidity resistance of the clad stainless steel. Not easy to occur. After the above heat treatment is completed, the isolation layer and the clad stainless steel plate can be welded. After the cladding is welded, no heat treatment is required.
I hope this content is helpful to you. For more information, please continue to pay attention to our stainless steel pipe suppliers!