Transactions of Materials and Heat Treatment

Title：Influence of cold rolling process on microstructure and properties of stainless steel 301L

Authors： Li Jingxiao Luan Daocheng Bao Shuai Sun Wenwen Sun Weipeng Zhang Wei Wang Zhengyun

Unit： Xihua University

KeyWords： stainless steel 301L cold rolling process reduction ratio martensitic transformation strain hardening

ClassificationCode：TG113

year,vol(issue):pagenumber：2017,42(6):164-168

Abstract：

After the multipass cold rolling experiment of 1.5 mm thickness stainless steel 301L, the sheets with reduction ratio of 20%, 30% and 40% were obtained, and the influences of cold rolling reduction ratio on microstructure and properties of stainless steel 301L were investigated by tensile test, metallographic analysis, SEM analysis, XRD diffraction analysis and hardness test of cold rolled sheets. The research shows that with the increase of cold rolling reduction ratio for stainless steel 301L, the amount of strain induced martensite gradually increases, the yield strength increases from 789 MPa to 1260 MPa, the tensile strength increases from 977 MPa to 1317 MPa, and the microhardness increases by 120 HV. Furthermore, the material appears grain fragmentation resulting in fine grain strengthening. Meanwhile, due to the martensitic transformation in stainless steel 301L, the tensile strain hardening exponent of 20% reduction ratio stainless steel 301L is greater than that of 30% reduction ratio stainless steel 301L.

Funds：

四川省科技支撑项目（2015GZ0164；2016GZ0226）

李京筱（1993-），女，硕士研究生栾道成（1964-），男，博士，教授

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