Solution treated microstructure and properties of duplex stainless steel 1Cr18Ni11Si4AlTi

doi:10.13251/j.issn.0254-6051.2021.07.008

Abstract

Abstract: Solution treatment experiments for 1Cr18Ni11Si4AlTi duplex stainless steel were carried out at different temperatures, and the relationship between the microstructure and properties of the steel and the solution treatment was studied. The results show that with the increase of solution treatment temperature, the precipitates in the steel gradually dissolve, the ferrite content increases, the yield strength increases with the increase of ferrite content, the hardness of the steel trends to decrease first and then increase, and reaches the lowest hardness at 1050 ℃. When the solution treatment temperature reaches or exceeds 1100 ℃,the microstructure is coarsened gradually, the ferrite content increases apparently, and the yield strength of the steel is obviously improved.

Key words: 1Cr18Ni11Si4AlTi steel, solid solution treatment, microstructure, ferrite, mechanical properties

CLC Number:

TG142.1

Li Rongzhi, Yang Yanfang, Zhang Quanxin. Solution treated microstructure and properties of duplex stainless steel 1Cr18Ni11Si4AlTi[J]. Heat Treatment of Metals, 2021, 46(7): 43-46.

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