Discussion on the automatic welding of 0Cr18Ni9 steel plates
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Those who work in stainless steel welding know that welding can cause significant deformation. Our company now has another piece of equipment with a thickness of 24 mm, and automatic welding is used for its fabrication. We would like to seek everyone’s advice on how to effectively avoid welding deformation I am using a Y-shaped groove with a root face thickness of 8 mm; I hope everyone can help me out~~!
It’s submerged arc automatic welding, right? For a 24-thick plate with 8 bevels, generally three layers are welded on the inside first; then the surface is cleaned using gas gouging, and followed by grinding with an angle grinder until a metallic shine appears. Finally, two more layers are welded using submerged arc welding. In the case of special media, the last weld should be applied to the layer in contact with the medium; moreover, when welding stainless steel, it is essential to control the interlayer temperature properly.
Third: low welding heat input, multiple passes, and control of interpass temperature.
What is the optimal interlayer temperature for stainless steel to avoid significant deformation? Look it up on that
The interlayer temperature should not exceed 100 degrees.
Deformation is easy to handle; the key is to control the welding temperature, otherwise the appearance will be unsightly due to overheating
What is the role of controlling the temperature between layers, and what are the consequences if this control is not carried out?
The interlayer temperature of stainless steel should preferably be kept below 60 degrees.
Agree with the suggestion from floor 2: victory:
I agree with what was said on the 2nd floor; we welded sheets of size 12 without any deformation occurring
Why does the weld width vary when using automatic welding for stainless steel welding? What are the reasons for these differences in width? The current and voltage used are the same; could everyone help me analyze this?