多道电子束扫描搭接率对40Cr钢组织与性能的影响

doi:10.13251/j.issn.0254-6051.2022.03.036

金属热处理 ›› 2022, Vol. 47 ›› Issue (3): 191-197.DOI: 10.13251/j.issn.0254-6051.2022.03.036

多道电子束扫描搭接率对40Cr钢组织与性能的影响

王荣, 龚玉辉, 殷学俊, 魏德强

桂林电子科技大学机电工程学院, 广西桂林 541004

收稿日期:2021-11-19 修回日期:2022-01-16 出版日期:2022-03-25 发布日期:2022-04-22
通讯作者: 魏德强,教授,硕士,E-mail: wdq1963@sina.com
作者简介:王荣(1965—),女,教授,博士,主要研究方向为新材料新工艺,E-mail: wr6056@guet.edu.cn。
基金资助:
国家自然科学基金(51665009);广西壮族自治区自然科学基金(2017GXNSFDA198007)

Effect of multi-pass electron beam scanning overlap rate on microstructure and properties of 40Cr steel

Wang Rong, Gong Yuhui, Yin Xuejun, Wei Deqiang

School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin Guangxi 541004, China

Received:2021-11-19 Revised:2022-01-16 Online:2022-03-25 Published:2022-04-22

摘要/Abstract

摘要： 对40Cr钢在不同搭接率下进行多道电子束扫描表面改性处理,并对其显微组织和力学性能进行了研究。结果表明,经多道电子束扫描表面改性处理,40Cr钢表面搭接区因回火生成回火马氏体及回火索氏体;重熔层中马氏体组织随着搭接率的增大而变得粗大。搭接率为0%时,电子束处理区域的平均显微硬度为627.4 HV0.2;搭接率增大,搭接区域表面显微硬度下降。当搭接率为25%时,试样表面光滑平整,粗糙度为1.083 μm;表面粗糙度随着搭接率的增大先减小后增大;40Cr钢耐磨性较电子束扫描处理前有明显改善。耐磨性随着搭接率的增大先增大后减小。

关键词: 40Cr钢, 电子束扫描处理, 搭接率, 显微组织, 硬度, 耐磨性

Abstract: Multi-pass electron beam scanning surface modification was carried out on 40Cr steel with different overlap rates, and microstructure and properties was studied. The results show that after multi-pass electron beam scanning surface modification, tempered martensite and tempered sorbite are formed in the overlapping area of 40Cr steel due to tempering, and the martensite structure in the remelted layer becomes coarsen with the increase of overlap rate. When the overlap rate is 0%, the average microhardness of the electron beam treatment area is 627.4 HV0.2, with the increase of overlap rate, the microhardness of overlap area decreases. When the overlap rate is 25%, the surface of the specimen is smooth and flat, and the roughness is 1.083 μm. The surface roughness first decreases and then increases with the increase of overlap rate. In addition, the wear resistance of the 40Cr steel is significantly improved compared with that before electron beam treatment. The wear resistance first increases and then decreases with the increase of overlap rate.

Key words: 40Cr steel, electron beam scanning treatment, overlap rate, microstructure, hardness, wear resistance

中图分类号:

TG439.3

王荣, 龚玉辉, 殷学俊, 魏德强. 多道电子束扫描搭接率对40Cr钢组织与性能的影响[J]. 金属热处理, 2022, 47(3): 191-197.

Wang Rong, Gong Yuhui, Yin Xuejun, Wei Deqiang. Effect of multi-pass electron beam scanning overlap rate on microstructure and properties of 40Cr steel[J]. Heat Treatment of Metals, 2022, 47(3): 191-197.

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多道电子束扫描搭接率对40Cr钢组织与性能的影响

Effect of multi-pass electron beam scanning overlap rate on microstructure and properties of 40Cr steel

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