金属热处理 ›› 2020, Vol. 45 ›› Issue (3): 41-45.DOI: 10.13251/j.issn.0254-6051.2020.03.009

• 组织与性能 • 上一篇    下一篇

多道搭接钴基合金激光熔覆层的组织与性能

崔陆军, 于计划, 曹衍龙, 曾文涵, 郭士锐, 李晓磊, 郑博   

  1. 中原工学院 机电学院, 河南 郑州 450007
  • 收稿日期:2019-09-23 出版日期:2020-03-25 发布日期:2020-04-03
  • 通讯作者: 郭士锐,副教授,博士,主要从事激光增材制造的研究,E-mail:laser@zut.edu.cn
  • 作者简介:崔陆军(1981—),男,副教授,博士,主要研究方向为网络化,微光纤传感器,E-mail:cuilujun@126.com。
  • 基金资助:

    中国纺织工业联合会科技指导性项目(2016085);河南省高等学校重点科研项目(20A460033,19A460035,20A460031);中原工学院自主创新应用研究项目(K2018YY001)

Microstructure and properties of multi-track joint Co-based alloy laser clad layer

Cui Lujun, Yu Jihua, Cao Yanlong, Zeng Wenhan, Guo Shirui, Li Xiaolei, Zheng Bo   

  1. School of Mechatronics and Engineering, Zhongyuan University of Technology, Zhengzhou Henan 450007, China
  • Received:2019-09-23 Online:2020-03-25 Published:2020-04-03

摘要:

以钴基合金粉作熔覆材料,利用激光熔覆技术在42CrMo基体表面制备高性能熔覆层。使用光学显微镜观察熔覆层的宏观形貌以及显微组织,采用显微硬度计、摩擦磨损试验仪测量基体与熔覆层的显微硬度及摩擦因数曲线并分析了其磨损机理。结果表明,熔覆层中的组织类型为平面晶、胞状晶和柱状晶,组织形态呈梯度分布。熔覆层平均硬度达到650 HV0.3,是基体平均硬度的2.7倍,其摩擦因数为0.275左右,比基体的摩擦因数小0.075左右。

关键词: 激光熔覆层, 钴基合金, 显微组织, 显微硬度, 磨损性能

Abstract:

Co-based alloy powder was used as a cladding material to prepare high performance cladding layer on the surface of 42CrMo substrate by using laser cladding technology. The macromorphology and microstructure of the clad layer were observed by an optical microscope. The microhardness and friction coefficient curves of the substrate and clad layer were measured by microhardness tester, friction and wear tester, and the wear mechanism was analyzed. The results show that the microstructure types of the clad layer are planar, cellular and columnar grains, and distributed as gradient morphology. The average hardness of the clad layer reaches 650 HV0.3, which is 2.7 times the average hardness of the substrate. The friction coefficient of the clad layer is about 0.275, about 0.075 smaller than that of the substrate.

Key words: laser clad layer, Co-based alloy, microstructure, micro-hardness, wear performance

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