Effect of hot rolling on microstructure and properties of 65Mn steel

doi:10.13251/j.issn.0254-6051.2021.12.036

Abstract

Abstract: Effect of hot rolling process on microstructure and mechanical properties of 65Mn steel was experimentally studied. Electron probe microanalyzer (EPMA) and transmission electron microscope (TEM) were used to characterize the hot-rolled microstructure. The results show that two initial structures of pearlite and bainite can be obtained by controlling the hot rolling process. With the decrease of final cooling temperature and final rolling temperature, the proeutectoid ferrite content and pearlite interlamellar spacing gradually decrease, and the strength and hardness gradually increase. Compared with pearlite, hot-rolled bainite has higher strength, with tensile and yield strengths of 943 MPa and 648 MPa, respectively.

Key words: 65Mn steel, hot rolling process, pearlite, interlamellar spacing, mechanical properties

CLC Number:

TG142.1

Yang Yingying, Wu Hongyan, Qi Min, Du Linxiu. Effect of hot rolling on microstructure and properties of 65Mn steel[J]. Heat Treatment of Metals, 2021, 46(12): 218-222.

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