Static softening analysis of 21Cr nickel saving duplex stainless steel during high temperature deformation process

doi:10.13251/j.issn.0254-6051.2022.01.014

Abstract

Abstract: Static softening behavior of 21Cr duplex stainless steel during high temperature deformation pass interval was studied by using thermal simulation. The effects of deformation temperature, strain rate and deformation degree on static recrystallization behavior and microstructure were discussed. The results show that the deformation conditions further affect the static softening behavior of duplex stainless steel by affecting the strain distribution in the two phases. With the increase of strain temperature and deformation degree, the strain in ferrite phase increases, and the recrystallization degree in ferrite increases, which causes the increase of static softening degree of duplex stainless steel. With the increase of strain rate, the variation of static softening rate is the same as that of strain assumed by austenite phase, which shows a trend of first decreasing and then increasing. The internal recrystallization degree of austenite is the lowest when the strain rate is 1 s^-1. The activation energy of static recrystallization of the 21Cr duplex stainless steel is about 301 kJ/mol.

Key words: 21Cr duplex stainless steel, double pass hot compression, strain distribution, static softening, microstructure

CLC Number:

TG142.1

Cui Cong, Gao Fei, Gao Ye, Liu Zhenyu. Static softening analysis of 21Cr nickel saving duplex stainless steel during high temperature deformation process[J]. Heat Treatment of Metals, 2022, 47(1): 79-87.

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