Cold forming of the hottest duplex stainless steel
2022-10-24- Detail
Cold forming of duplex stainless steel
duplex stainless steel has excellent stress corrosion cracking resistance. They have two-phase microstructure and roughly equal austenite and ferrite ratio. The most common brand is 2205 (unss31803), containing 22% Cr, 5.5% Ni, 3% Mo and 0.14% n. The yield strength of duplex stainless steel is higher than that of traditional austenitic stainless steel. Therefore, higher stress is required for initial deformation. For example, when forming 2205, the bending capacity is reduced by 50% compared with austenitic stainless steel. Duplex stainless steel has excellent stress corrosion cracking resistance. They have two-phase microstructure and roughly equal austenite and ferrite ratio. The most common brand is 2205 (unss31803), containing 22% Cr, 5.5% Ni, 3% Mo and 0.14% n. The yield strength of duplex stainless steel is higher than that of traditional austenitic stainless steel. Therefore, higher stress is required for initial deformation. For example, when forming 2205, the bending capacity is reduced by 50% compared with austenitic stainless steel. Of course, once the yield stress is reached, the deformation of duplex stainless steel is as easy as austenitic stainless steel
due to the high yield stress of duplex stainless steel, there will be relatively large springback. When bending at 90, it needs about 10% excessive bending to fully compensate for springback. Hydraulic press is the first choice
duplex stainless steel such as 2205 requires a large internal bending radius, which is generally 3~4 times the plate thickness. Sharp bending should always be carried out along the vertical direction of rolling
when the cold causes a large amount of processing deformation in China, the largest auto manufacturer of test software under Windows XP operating system, it should be considered to carry out re solution treatment (re annealing) after all deformation is completed, especially in the severely corrosive service environment
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