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Key points of welding process for duplex steel and stainless steel pipe

Key points of welding process for duplex steel and stainless steel pipe

Dual-phase stainless steel pipe is restricted by its own metallurgical characteristics, which limits the choice of welding methods. Too high welding line energy and too low welding line energy are not ideal. When the energy of the welding line is too high, the cooling speed of the welded joint is reduced, which is conducive to the transition of ferrite to austenite in the heat affected zone and the weld metal to obtain a sufficient amount of austenite, but it is easy to lead to the growth of ferrite grains, produce harmful intermetallic phases and reduce toughness. Then, let's learn what are the main points of the welding process of dual-phase stainless steel pipes!

2022-01-19

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