金属热处理 ›› 2023, Vol. 48 ›› Issue (8): 106-112.DOI: 10.13251/j.issn.0254-6051.2023.08.017

• 工艺研究 • 上一篇    下一篇

轧制方式及热处理工艺对中锰钢组织和性能的影响

彭龙生1, 刘春泉2, 熊芬2, 张颖2, 黄伟1, 林英华3   

  1. 1.湖南力方轧辊有限公司 湖南省高耐磨合金材料先进制造工程技术研究中心, 湖南 衡阳 421681;
    2.湖南工学院 材料科学与工程学院, 湖南 衡阳 421002;
    3.南华大学 机械工程学院, 湖南 衡阳 421001
  • 收稿日期:2023-04-25 修回日期:2023-06-14 出版日期:2023-08-25 发布日期:2023-10-10
  • 通讯作者: 刘春泉,讲师,博士研究生,E-mail: liuchunquan@hnit.edu.cn
  • 作者简介:彭龙生(1962—),男,高级工程师,主要研究方向为高耐磨合金材料,E-mail: lflslfls@163.com。
  • 基金资助:
    湖南省“小荷”科技人才专项(2023TJ-X10);湖南省自然科学基金(2023JJ50108);衡阳市“小荷”科技人才项目(衡市科协字〔2022〕68号);湖南工学院自科培育项目(2022HY007);衡阳市科技计划(202121014479);“机械工程”学科2022年度省级科技创新平台开放课题项目(KFKA2205);湖南省大学生创新创业训练计划(S202311528049,S202311528056X)

Effects of rolling method and heat treatment process on microstructure and properties of medium-Mn steel

Peng Longsheng1, Liu Chunquan2, Xiong Fen2, Zhang Ying2, Huang Wei1, Lin Yinghua3   

  1. 1. Hunan Advanced Manufacturing Engineering Technology Research Center of High Wear-resistant Alloy Materials, Hunan Lifang Roll Co., Ltd., Hengyang Hunan 421681, China;
    2. School of Materials Science and Engineering, Hunan Institute of Technology, Hengyang Hunan 421002, China;
    3. School of Mechanical Engineering, University of South School, Hengyang Hunan 421001, China
  • Received:2023-04-25 Revised:2023-06-14 Online:2023-08-25 Published:2023-10-10

摘要: 中锰钢Fe-0.11C-5.23Mn-1.11Al-0.10Si经不同方式(热轧(HR)、温轧(WR)和冷轧(CR))轧制后,分别进行不同工艺热处理(奥氏体逆相变(ART)和淬回火(Q&T)),研究不同轧制方式+热处理工艺对其组织和性能的影响。结果表明,HR+WR+ART处理试验钢的显微组织主要由板条状奥氏体和铁素体组成,同时存在少量等轴块状奥氏体组织。HR+WR+ART处理试验钢的晶粒尺寸显著减小,具有高体积分数的残留奥氏体,可产生更为广泛的TRIP效应;经HR+WR+ART和HR+WR+Q&T处理后,试验钢均表现出较好的综合性能,但前者更优,即抗拉强度为1001 MPa,屈服强度为745.7 MPa,断后伸长率为49.2%,强塑积为49.25 GPa·%。

关键词: 中锰钢, 轧制方式, 热处理, 残留奥氏体, 力学性能

Abstract: Medium-Mn steel Fe-0.11C-5.23Mn-1.11Al-0.10Si was heat treated with different processes (austenite reverse transformation(ART) and quenching and tempering(Q&T)) after different rolling methods (hot rolling(HR), warm rolling(WR) and cold rolling(CR)). The effects of different rolling and heat treatment processes on microstructure and properties of the steel were investigated. The results show that the microstructure of the steel treated by HR+WR+ART is mainly composed of lath austenite and ferrite, with a small amount of equiaxed massive austenite. The grain size of the steel treated by HR+WR+ART is significantly reduced, with a high volume fraction of retained austenite, which can generate a wider TRIP effect. After treated by HR+WR+ART and HR+WR+Q&T, the steel shows good comprehensive properties, but the former is superior, with the tensile strength of 1001 MPa, yield strength of 745.7 MPa, elongation after fracture of 49.2% and the product of strength and elongation of 49.25 GPa·%.

Key words: medium-Mn steel, rolling method, heat treatment, retained austenite, mechanical properties

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