锻压技术

22MnB5高强钢与201不锈钢温轧复合板组织性能研究

英文标题：Study on microstructure and properties of warm-rolled cladding plate for 22MnB5 high-strength steel and 201 stainless steel

作者：李占富陈龙刘发姚圣杰赵洪运初冠南

单位：哈尔滨工业大学(威海)

关键词：温轧工艺不锈钢复合板界面组织力学性能压下率

分类号：TG335.81

出版年,卷(期):页码：2021,46(7):199-206

摘要：

采用温轧工艺制备22MnB5高强钢与201不锈钢的复合板，通过扫描电镜(SEM)、X射线衍射、拉伸实验等方法研究了复合板的界面组织及力学性能。结果表明，温轧工艺制备的不锈钢复合板从基层到覆层之间依次为脱碳层、结合界面、渗碳层3种组织形貌。脱碳层的厚度随着压下率的增加而增大，覆层的奥氏体组织发生了形变诱发马氏体相变，热处理后的基层组织为板条马氏体。复合板界面处出现元素的相互扩散，且C、Cr、Mn元素的扩散能力较强，热处理后扩散层厚度增加。随着压下率的逐渐增加，复合板的抗拉强度增加、伸长率降低。热处理后复合板的抗拉强度达到1160 MPa以上，伸长率有所提高。

The cladding plate of 22MnB5 high-strength steel and 201 stainless steel was prepared by the warm rolling process, and the interfacial microstructures and mechanical properties of the cladding plate were studied by scanning electron microscope (SEM), X-ray diffraction and tensile test. The results show that the cladding plate prepared by the warm rolling process has three microstructures, namely, the decarburized layer, the bonding interface and the carburized layer from the base layer to the cladding layer. The thickness of the decarburized layer increases with the increasing of reduction ratio, the deformation induced martensite transformation is found in the austenite structure of the cladding layer, and the microstructure of the base layer after heat treatment is lath martensite. In addition, there is mutual diffusion of elements at the interface of the cladding plate, and because of the strong diffusion ability of C, Cr and Mn elements, the thickness of the diffusion layer increases after heat treatment. Furthermore, the tensile strength of the cladding plate increases and the elongation decreases with the increasing of reduction ratio, and after heat treatment, the tensile strength of the cladding plate reaches more than 1160 MPa and the elongation is also improved.

基金项目：

国家自然科学基金重点项目（U1937205）；国家自然科学基金资助项目（51775134）；山东省重大科技创新工程项目（2019TSLH0103,2020CXGC010303,2019JZZY020324）；山东省自然科学基金资助项目（ZR2020ME146）

作者简介：李占富（1987-），男，硕士研究生，E-mail：zhanfulee@163.com；通信作者：姚圣杰（1982-），男，博士，副教授，E-mail：shj_yao2010@hit.edu.cn

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