材料工程2025，Vol.53Issue(8)：175-184,10.DOI:10.11868/j.issn.1001-4381.2024.000493
热处理工艺对中碳低合金半硬磁钢组织转变与磁性能的影响
Effects of heat treatment processes on microstructural evolution and magnetic properties in medium-carbon low-alloy semi-hard magnetic steels
李军 1赵锴 1李波 2赵宇 3郭欢 3韩思远3
作者信息
- 1. 安泰科技股份有限公司,北京 100081||钢铁研究总院有限公司,北京 100081
- 2. 中国钢研科技集团有限公司,北京 100081
- 3. 安泰科技股份有限公司,北京 100081
- 折叠
摘要
Abstract
To obtain Fe-based medium-carbon low-alloy semi-hard magnetic steels with high residual magnetic flux density Br,five distinct heat treatment processes are employed:full annealing,air quenching(AQ),water quenching(WQ),air quenching followed by tempering(AQ&T),and water quenching followed by tempering(WQ&T).The microstructural evolution and corresponding changes in magnetic properties are systematically investigated by using SEM,EBSD,XRD,and magnetic measurement techniques.The results show that rapid cooling after austenitization forms martensite,and subsequent tempering transforms it into tempered troostite,achieving optimal magnetic properties:a maximum working magnetic induction Bm=1.819 T,residual magnetic flux density Br=1.49 T,and an exceptionally high remanence ratio(Br/Bm).Compared to full annealing,the water quenching and tempering(WQ&T)process increases the residual magnetic flux density Br of the experimental steel by 65%and enhances the remanence ratio from 0.57 to 0.82,approaching the theoretical limit for polycrystalline materials.Furthermore,combined with the experimental results,the influence of microstructural evolution factors on magnetic properties is analyzed and discussed through heat treatment process regulation.It provides guidance for heat treatment of medium-carbon low-alloy semi-hard magnetic steels with high remanence characteristics.关键词
半硬磁钢/马氏体/回火托氏体/剩磁/剩磁比Key words
semi-hard magnetic steel/martensite/tempered troostite/remanence/remanence ratio分类
矿业与冶金引用本文复制引用
李军,赵锴,李波,赵宇,郭欢,韩思远..热处理工艺对中碳低合金半硬磁钢组织转变与磁性能的影响[J].材料工程,2025,53(8):175-184,10.
