退火温度对冷轧8Mn钢低温热成形后组织和性能的影响

doi:10.13251/j.issn.0254-6051.2022.11.004

金属热处理 ›› 2022, Vol. 47 ›› Issue (11): 25-31.DOI: 10.13251/j.issn.0254-6051.2022.11.004

退火温度对冷轧8Mn钢低温热成形后组织和性能的影响

张博明, 徐德超, 滕华湘, 赵海峰, 韩赟

首钢集团有限公司技术研究院, 北京 100043

收稿日期:2022-03-10 修回日期:2022-06-15 出版日期:2022-11-25 发布日期:2023-01-04
作者简介:张博明(1992—),男,工程师,硕士,主要研究方向为高强度汽车板,E-mail:diamanteZBM@163.com

Effect of annealing temperature on microstructure and properties of cold rolled 8Mn steel after low temperature hot stamping

Zhang Boming, Xu Dechao, Teng Huaxiang, Zhao Haifeng, Han Yun

Research Institute of Technology, Shougang Group Co., Ltd., Beijing 100043, China

Received:2022-03-10 Revised:2022-06-15 Online:2022-11-25 Published:2023-01-04

摘要/Abstract

摘要： 采用冷轧8Mn钢为试验材料,利用光学显微镜、扫描电镜、电子拉力万能试验机等,结合EBSD和XRD分析技术研究了不同退火温度对低温热成形前后试验钢组织和性能的影响。结果表明,热成形前,试验钢中的奥氏体含量随着退火温度的升高而降低。低温热成形后试验钢的显微组织为马氏体、铁素体和残留奥氏体。不同温度退火并热成形后试验钢的抗拉强度均为1400 MPa左右,屈服强度为900 MPa左右,伸长率为10%左右。退火温度对8Mn钢低温热成形后力学性能影响较小。

关键词: 中锰钢, 退火, 低温热成形, 显微组织, 力学性能

Abstract: Effect of annealing temperature on microstructure and properties of cold rolled 8Mn steel before and after low temperature hot stamping was studied by means of optical microscope, SEM, electronic tensile testing machine, EBSD and XRD analysis techniques. The results show that the austenite content decreases with the increase of annealing temperature before hot stamping. The microstructure of the annealed tested steel after stamping consists of martensite, ferrite and retained austenite. After hot stamping, the tensile strength of the tested steel annealed at different temperatures is about 1400 MPa, the yield strength is about 900 MPa, and the elongation is about 10%. It is concluded that the annealing temperature has little effect on mechanical properties of the 8Mn steel after low temperature hot stamping.

Key words: medium manganese steel, annealing, low temperature hot stamping, microstructure, mechanical properties

中图分类号:

TG142.1

张博明, 徐德超, 滕华湘, 赵海峰, 韩赟. 退火温度对冷轧8Mn钢低温热成形后组织和性能的影响[J]. 金属热处理, 2022, 47(11): 25-31.

Zhang Boming, Xu Dechao, Teng Huaxiang, Zhao Haifeng, Han Yun. Effect of annealing temperature on microstructure and properties of cold rolled 8Mn steel after low temperature hot stamping[J]. Heat Treatment of Metals, 2022, 47(11): 25-31.

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退火温度对冷轧8Mn钢低温热成形后组织和性能的影响

Effect of annealing temperature on microstructure and properties of cold rolled 8Mn steel after low temperature hot stamping

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