Influence of Tempering Temperature on the Microstructure and Mechanical Properties of 2%Mn High Strength Steel

被引：0

作者：

Fan, Lifeng ^{[1
,2
]}

Yang, Yulong ^{[1
]}

Yue, Erbin ^{[3
]}

Guo, Hongfei ^{[1
]}

Huang, Jiao ^{[1
]}

Gao, Jun ^{[4
]}

机构：

[1] School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot

[2] Engineering Research Center of Rare Earth Metals, Inner Mongolia University of Technology, Hohhot

[3] Zhejiang Metallurgical Research Institute Co.,Ltd., Hangzhou

[4] Manufacturing Dept. of Inner Mongolia Baotou Steel Union Co.,Ltd., Inner Mongolia, Baotou

来源：

Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 15期

基金：

中国国家自然科学基金;

关键词：

2%Mn high strength steel; mechanical property; retained austenite; tempering;

D O I：

10.11896/cldb.23080090

中图分类号：

学科分类号：

摘要：

Development direction of advanced high-strength steel is high strength and high plasticity. In this work,the 2%Mn steel as the research subject,and the best matching of high strength and high plasticity was achieved by controlling the tempering temperature,the SEM,TEM and XRD were used to analyze the influence mechanism of microstructure and mechanical properties. the results show that:The steel was organized as ferrite,pearlite,low carbon martensite and residual austenite after isothermal annealing in the pearllet region;the residual austenite volume fraction continuously decreased from 6. 78% of the annealed state to 2. 55% of the 425 ℃ tempering state,then the residual austenite volume fraction was basically unchanged and maintained at a stable level as the tempering temperature increases further;with the increase of tempering temperature,ferrite content continues to increase,dislocation density,tensile strength,yield strength and hardness continuous to decrease,and extension increases first then decreasing;after 425 ℃ tempering,the average batten width of ferrite was 95. 1 nm,dislocation density was 2. 6× 1014 m-2,average diameter of carbide was 13. 9 nm,tensile strength was 1 770 MPa,yield strength was 1 450 MPa,elongation was 9. 84%, and the strong plastic product reached maximum of 17. 4 GPa·%. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.

引用

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