关键词: 超级马氏体不锈钢, 逆变奥氏体, 正火, 回火, 显微组织, 力学性能

Abstract: Effect of 1050 ℃ normalizing+550-700 ℃ tempering treatment on microstructure and mechanical properties of the 00Cr13Ni5Mo super martensitic stainless steel plate was studied. The results show that after normalization at 1050 ℃ and with the increase of subsequent tempering temperature, the lath martensite gradually decomposes and produces reversed austenite. When tempered at 600 ℃, the content of reversed martensite is the highest, and then gradually decreases with the increase of tempering temperature. And the strength, hardness and yield ratio of the tested steel decrease first and then increase with the increase of tempering temperature. When tempered at 650 ℃, a complex phase microstructure containing fine tempered sorbite and reversed austenite can be obtained, and the tested steel has lower yield ratio and good impact property.

Key words: super martensitic stainless steel, reversed austenite, normalizing, tempering, microstructure, mechanical properties