Effect of cryogenic treatment and tempering temperature on mechanical and microstructural properties of AISI 431 steel

This study investigated the effects of cryogenic treatment and tempering temperature applied after on mechanical microstructural properties AISI 431 martensitic stainless steel. After conventional heat (CHT), steel samples were cryogenically treated at -180 °C for 6 hours then tempered 200 (CT200) 300 (CT300) 2 hours. these processes, hardness measurement, tensile test, abrasion test carried out to determine samples. In addition, microstructure photographs taken properties. As a result study, it was observed that effective Cryogenic showed greatest effect wear resistance. CT200 CT300 62% 56% less worn than CHT sample. Compared sample, yield strength increased by 6.95% 7.03%, while 3.89% 3.52%.