Effect of normalizing temperature on microstructure and properties of USS122G ultra-high strength stainless steel

doi:10.13251/j.issn.0254-6051.2020.11.014

Abstract

Abstract: Effect of normalizing temperature on the microstructure and hardness of USS122G ultra-high strength stainless steel was studied by means of optical microscope, electron scanning microscope, physicochemical phase analysis, etc. The results indicate that with the increase of normalizing temperature, the hardness and the secondary phase content decrease, while the retained austenite content and the prior austenite grain size increase. By comprehensive analysis of the relationship between the normalizing temperature with the type, mass fraction, hardness and grain size of the secondary phase in the steel, it is concluded that the optimum normalizing temperature of the tested steel is 1020 ℃.

Key words: normalizing temperatures, hardness, secondary phase, microstructure, ultra-high strength stainless steel

CLC Number:

TG156

Bai Ruoxin, Liu Zhenbao, Cao Jianchun, Yang Zhe. Effect of normalizing temperature on microstructure and properties of USS122G ultra-high strength stainless steel[J]. Heat Treatment of Metals, 2020, 45(11): 73-77.

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