不锈钢板焊接常见问题 (2)

氩弧焊不锈钢板出现气泡的原因是什么?

Question description: The first welding some small bubbles generated, so make-up welding. But the bubble is bigger, can not be welded intact. The thickness of stainless steel sheet is 0.6mm, the material is 201.

Answer:

• There may be the following reasons:
• The weld is not clean. There are oil, water, ETC.
• The protective gas is not pure. The end of the wire exposed to the air.

Repair methods:

1. The air holes with the angle to the light machine such as off
2. Clean up the surface to be welded. (If necessary, can be cleaned up with acetone)
3. The use of 99.99% of the argon gas
4. Welding wire end should always be in the inert gas protection.

Question: Will SUS 201 rust in 150 degree Celsius high temperature 95% high humidity environment?

Answer: 201 stainless steel material in the high temperature will certainly rust. 201 stainless steel material antioxidant and corrosion resistance is not as good as 304 material, itself easy to rust. And in the welds and scratches are more prone to rust! The service life itself is short, but a short time is not a problem, can be used for two or three years.

Question: 2mm thick 304 stainless steel plate welding, with argon arc welding or stainless steel welding rod is good?

Answer: Argon arc welding is good, argon arc welding thin plate welding effect is very good. Argon arc welding in the welding of thin plate in the deformation control and burn-through energy performance advantages are obvious. Especially the welding of high-alloy materials.

Question: Can TIG welding weld 0.2mm thickness stainless steel with 2mm thickness stainless steel plate together?

Answer: It is possible to weld, but it requires the welder to have a relatively high level of operational skills as well as appropriate welding process parameters.