The plasticity of stainless steel is poor. The austenitic stainless steel strength is high, but with a high coefficient of thermal expansion, bad luck in the casting process, including welding.
Reducing the carbon content and nitrogen content can significantly improve the formability, under certain conditions can improve the deep drawing performance. For example, SUS430 r = 1.0, while the low carbon SUS430D r = 1.6, while the elongation can be stabilized at more than 30%. The r value of the rolled YUS436S is significantly improved, especially after rolling through the large diameter roll, unlike the SUS304, under appropriate stamping conditions.
These new ferrite stainless steels can be processed in super deep drawing. The ultrafold clarity Fe-Cr alloy has good formability, and an elongation of greater than 36% can be obtained in stainless steels with a chromium content of 18%.
Accompanied by the increase in the production of stainless steel plate round, the processing method from cutting into forging, open up a good cold forging performance of the new stainless steel SUSMX7. Also opened the addition of S, Pb, Se for easy cutting stainless steel and the critical compression ratio of the new steel.
Recently, it is being studied to lubricate stainless steel sheet. Steel coated with an organic coating on the surface can be shaped in the absence of a lubricating oil or protective layer, and is expected to be used in the context of improved conditions and reduced production costs.