Study on Corrosion Resistance of 1Cr17Ni2 Martensitic Stainless Steel Sheet Metal Parts

Aiming at the problems of surface blackening and rusting of 1Cr17Ni2 martensitic stainless steel sheet metal parts during manufacturing process, the test of raw material smelting component control, vacuum annealing process, parts heat treatment, forming process were carried out. By analyzing and testing the δ-ferrite content, microhardness and metallographic structure, the process optimization measures were worked out. The results show that the surface corrosion resistance of the parts is improved by controlling Cr and Ni chemical composition, adopting vacuum annealing process, vacuum quenching heat treatment process, adding magnetic polishing and so on.