As-cast microstructure and high temperature solution treatment process of 254SMO stainless steel

doi:10.13251/j.issn.0254-6051.2021.11.034

Abstract

Abstract: Effect of solution treatment at different temperatures and time on the as-cast microstructure of super austenitic stainless steel 254SMO was studied by microstructure observation and back scattering electron scanning, and the σ phase dissolution process in the steel was studied by electron microprobe. The results show that with the increase of solution treatment time and temperature, the as-cast dendrite structure and the segregation gradually disappear, and the σ phase gradually dissolves and transforms into δ phase (ferrite). The optimum solid solution treatment process is 1280 ℃×9 h.

Key words: solid solution treatment, 254SMO stainless steel, σ phase, as-cast microstructure

CLC Number:

TG156.1

Gao Ang, Qian Zhangxin, Liu Dexue. As-cast microstructure and high temperature solution treatment process of 254SMO stainless steel[J]. Heat Treatment of Metals, 2021, 46(11): 195-198.

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As-cast microstructure and high temperature solution treatment process of 254SMO stainless steel

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