20Mn23AlV无磁结构钢热轧板的组织性能及动态再结晶行为

doi:10.13251/j.issn.0254-6051.2024.07.014

金属热处理 ›› 2024, Vol. 49 ›› Issue (7): 91-99.DOI: 10.13251/j.issn.0254-6051.2024.07.014

20Mn23AlV无磁结构钢热轧板的组织性能及动态再结晶行为

罗晓阳¹, 程刚虎², 靳科², 周维莲², 侯园园², 唐兴昌^2,3

1.酒钢集团碳钢薄板厂, 甘肃嘉峪关 735100;
2.兰州理工大学材料科学与工程学院, 甘肃兰州 730050;
3.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050

收稿日期:2024-02-05 修回日期:2024-05-10 出版日期:2024-07-25 发布日期:2024-08-29
通讯作者: 唐兴昌,副研究员,博士,E-mail: tangxingchanglut@163.com
作者简介:罗晓阳(1986—),男,高级工程师,主要研究方向为钢铁材料工艺开发,E-mail: luoxiaoyang@jiugang.com。
基金资助:
甘肃省科技专员专项(23CXGA0013)

Microstructure, properties and dynamic recrystallization behavior of 20Mn23AlV non-magnetic structural steel hot rolled plate

Luo Xiaoyang¹, Cheng Ganghu², Jin Ke², Zhou Weilian², Hou Yuanyuan², Tang Xingchang^2,3

1. Carbon Steel Sheet Factory, Jiusteel Group, Jiayuguan Gansu 735100, China;
2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou Gansu 730050, China;
3. State Key Laboratory of Advanced Processing and Reuse of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou Gansu 730050, China

Received:2024-02-05 Revised:2024-05-10 Online:2024-07-25 Published:2024-08-29

摘要/Abstract

摘要： 通过试验研究了20Mn23AlV无磁结构钢热轧板密度、组织及力学性能,并对其进行了多道次热模拟试验,研究了多道次热模拟前后组织及磁性能变化。因Al元素的加入,无磁钢密度较通用钢密度降低了约0.192 g/cm³。无磁钢热轧板平均抗拉强度为721 MPa,屈服强度为371 MPa,断后伸长率为69.5%,具有良好的强塑性匹配。经过多道次热模拟试验可知,20Mn23AlV无磁结构钢经过60%热压缩变形之后,在950 ℃时会发生动态再结晶行为,奥氏体平均晶粒尺寸从10.24 μm减小到6.08 μm。多道次热模拟前后没有发生相转变,经过磁导率测试,多道次热模拟前后相对磁导率分别为1.001和1.002,满足无磁钢对磁性能要求。

关键词: 20Mn23AlV无磁结构钢, 密度, 多道次热模拟, 动态再结晶, 相对磁导率

Abstract: Experimental study on the density, microstructure, and mechanical properties of 20Mn23AlV non-magnetic structural steel hot-rolled plate was conducted. Additionally, multi-pass thermal simulation tests were performed to investigate the changes in microstructure and magnetic properties before and after the tests. The results show that, due to the addition of the Al element, the density of the tested steel is reduced by approximately 0.192 g/cm³ compared to that of common steels. The average tensile strength of the hot-rolled plate of non-magnetic steel is 721 MPa, the yield strength is 371 MPa, and the elongation after fracture is 69.5%, indicating good strength-ductility matching. It is found that through multi-pass thermal simulation experiments with 60% hot compression deformation, the tested steel undergoes dynamic recrystallization behavior at 950 ℃, with the average austenite grain size decreasing from 10.24 μm to 6.08 μm. There is no phase transformation before and after the multi-pass thermal simulation tests, and the relative permeability measured is 1.001 and 1.002, respectively, which meets the requirements for the magnetic properties of non-magnetic steel.

Key words: 20Mn23AlV non-magnetic structural steel, density, multi-pass thermal simulation, dynamic recrystallization, relative permeability

中图分类号:

TG162.83

罗晓阳, 程刚虎, 靳科, 周维莲, 侯园园, 唐兴昌. 20Mn23AlV无磁结构钢热轧板的组织性能及动态再结晶行为[J]. 金属热处理, 2024, 49(7): 91-99.

Luo Xiaoyang, Cheng Ganghu, Jin Ke, Zhou Weilian, Hou Yuanyuan, Tang Xingchang. Microstructure, properties and dynamic recrystallization behavior of 20Mn23AlV non-magnetic structural steel hot rolled plate[J]. Heat Treatment of Metals, 2024, 49(7): 91-99.

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20Mn23AlV无磁结构钢热轧板的组织性能及动态再结晶行为

Microstructure, properties and dynamic recrystallization behavior of 20Mn23AlV non-magnetic structural steel hot rolled plate

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