Effects of Quenching Process on the Microstructure of High-Carbon Martensitic Stainless Steel

摘要

The content of retained austenite has an increasing tendency with the increasing austenitizing temperature, while the fraction volume of carbides increases first and then decreases. The martensite start temperature (M_s) and martensite finish temperature (Mf) decrease with the increasing cooling rates, and air-quenched samples can obtain less retained austenite, more compact microstructure than that of oil-quenched samples. For HMSS, the martensitic transformation takes place at some isolated area with a jumping mode and slow nucleation speed.