Precipitation behavior of super austenitic stainless steel containing copper

doi:10.13251/j.issn.0254-6051.2021.01.035

Abstract

Abstract: Cu-containing super austenitic stainless steel was solution treated at 1200 ℃ for 2 h and aged at 600,700,800,900,1000 and 1100 ℃ for 2 h respectively,then the precipitated phases were studied by using Thermo-Calc,SEM,EDS and TEM.The results show that the precipitated phases at 600-800 ℃ are mainly intergranular σ phase,that at 1000 ℃ are intergranular bulk σ phase,rod-shaped Laves phase,and the long needle-like and fusiform χ phase,while that at 1100 ℃ no precipitation.As the temperature rises,the size of the precipitates increases,the total amount of precipitates first increases then decreases and reaches its peak value at 900 ℃,and the precipitation of Laves and χ phases is promoted with the increase of Cu content.

Key words: superaustenitic stainless steel, Cu, precipitated phase

CLC Number:

TG161

Li Bingbing, Chen Haitao, Lang Yuping, Qu Huanpeng, Tian Zhiling, Chen Qingming. Precipitation behavior of super austenitic stainless steel containing copper[J]. Heat Treatment of Metals, 2021, 46(1): 193-199.

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