冷变形对超低碳贝氏体钢中逆转变奥氏体的影响  

Effect of cold deformation on reversed austenite in ultra-low carbon bainitic steel

作　　者：杨颖 许媛媛 潘诗良 王泽民 YANG Ying;XU Yuanyuan;PAN Shiliang;WANG Zemin(School of Materials Science and Engineering,Shanghai Institute of Technology,Shanghai 201418,China;Nantong High Entropy New Material Technology Co.,Ltd.,Nantong 226004,China;Shanghai Pengtai Machinery Technology Co.,Ltd.,Shanghai 201406,China)

机构地区：[1]上海应用技术大学材料科学与工程学院,上海201418 [2]南通高熵新材料科技有限公司,南通226004 [3]上海朋泰机械科技有限公司,上海201406

出　　处：《理化检验（物理分册）》2024年第8期16-22,共7页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：国家重点研发计划项目(NO.2017YFB0304501);上海科委项目(16090503600)。

摘　　要：采用硬度测试、拉伸试验、金相检验、X射线衍射测试、透射电镜检测、能谱分析等方法研究形变对超低碳贝氏体钢中逆转变奥氏体和力学性能的影响。结果表明:随着冷轧变形量的增大,超低碳贝氏体钢的硬度与强度呈显著增大趋势;超低碳贝氏体钢中的奥氏体体积分数从未变形时的0.4%逐渐增大到变形量为90%时的14.85%;钢中的逆转变奥氏体主要分布在晶界处,其形态由未变形时的薄膜状向块状转变;奥氏体中的Ni元素和Mn元素质量分数随变形量的增大而减小,Ni元素质量分数由未变形时的59%下降到变形量为90%时的11.64%,Mn元素质量分数由未变形时的16%下降到变形量为90%时的3.48%。The effects of deformation on the reversed austenite and mechanical properties of ultra-low carbon bainitic steel were studied by means of hardness test,tensile test,metallographic examination,X-ray diffraction test,transmission electron microscopy and energy spectrum analysis.The results show that the hardness and strength of ultra-low carbon bainitic steel increased significantly with the increase of cold rolling reduction.The volume fraction of austenite in ultra-low carbon bainitic steel gradually increased from 0.4%to 14.85%when the deformation was 90%.The reversed austenite in the steel was mainly distributed at the grain boundary,and its morphology changed from film-like to block-like.The mass fraction of Ni and Mn in austenite decreased with the increase of deformation.The mass fraction of Ni decreased from 59%to 11.64%when the deformation was 90%,and the mass fraction of Mn decreased from 16%to 3.48%when the deformation was 90%.

关 键 词：超低碳贝氏体钢 冷轧变形量 逆转变奥氏体 Ni元素和Mn元素 形态 

分 类 号：TG142.25[一般工业技术—材料科学与工程] TG115.2[金属学及工艺—金属材料]