Cr12MoV钢激光熔覆Ni-Al复合涂层的组织及性能

doi:10.13251/j.issn.0254-6051.2021.11.040

金属热处理 ›› 2021, Vol. 46 ›› Issue (11): 226-231.DOI: 10.13251/j.issn.0254-6051.2021.11.040

Cr12MoV钢激光熔覆Ni-Al复合涂层的组织及性能

陈滋鑫, 周后明, 朱宇旭, 张哲豪, 何方佳, 徐采星, 刘刚

湘潭大学机械工程学院, 湖南湘潭 411105

收稿日期:2021-05-02 出版日期:2021-11-25 发布日期:2021-12-08
通讯作者: 周后明,教授,博士,E-mail:zhouhouming@xtu.edu.cn
作者简介:陈滋鑫(1994—),男,硕士研究生,主要研究方向为激光表面改性,E-mail:1436524042@qq.com
基金资助:
湖南省自然科学基金(2020JJ4585);国家自然科学基金(51775469,51775470);长株潭标志性工程计划重大标志性创新示范工程项目(2019XK2303);湘潭市科技计划(ZD-ZD20191007)

Microstructure and properties of laser clad Ni-Al composite coatings on Cr12MoV steel

Chen Zixin, Zhou Houming, Zhu Yuxu, Zhang Zhehao, He Fangjia, Xu Caixing, Liu Gang

School of Mechanical Engineering, Xiangtan University, Xiangtan Hunan 411105, China

Received:2021-05-02 Online:2021-11-25 Published:2021-12-08

摘要/Abstract

摘要： 利用激光熔覆技术在Cr12MoV钢上熔覆了Ni-Al复合涂层,研究了Al含量对熔覆层组织形貌及力学性能的影响。结果表明:当熔覆层Al含量大于14%时,开始有裂纹出现;熔覆层的显微组织中无明显夹杂物,存在硬质相Al₂O₃及金属间化合物Ni₃Fe、AlNi₃;随着Al含量的增加,熔池边界逐渐消失,硬度、耐磨性呈先减小后增加的趋势。综合来看,Al含量为14%的熔覆层性能最佳。

关键词: 激光熔覆, Ni-Al复合涂层, 微观组织, 显微硬度, 摩擦磨损

Abstract: Ni-Al composite coatings on Cr12MoV steel were fabricated by laser cladding technology and the effect of Al content on structure and mechanical properties of the clad layer was studied. The results show that when the Al content is more than 14%, cracks begin to appear. There is no obvious inclusion in the clad layer, but there are hard phases Al₂O₃ and intermetallic compounds Ni₃Fe and AlNi₃in the clad layer. As the Al content increases, the boundary of molten pool gradually disappears, and the hardness and wear resistance decrease firstly and then increase. On the whole, the clad layer with 14% Al has the best performance.

Key words: laser cladding, Ni-Al composite coatings, microstructure, microhardness, friction and wear

中图分类号:

TG665

陈滋鑫, 周后明, 朱宇旭, 张哲豪, 何方佳, 徐采星, 刘刚. Cr12MoV钢激光熔覆Ni-Al复合涂层的组织及性能[J]. 金属热处理, 2021, 46(11): 226-231.

Chen Zixin, Zhou Houming, Zhu Yuxu, Zhang Zhehao, He Fangjia, Xu Caixing, Liu Gang. Microstructure and properties of laser clad Ni-Al composite coatings on Cr12MoV steel[J]. Heat Treatment of Metals, 2021, 46(11): 226-231.

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Cr12MoV钢激光熔覆Ni-Al复合涂层的组织及性能

Microstructure and properties of laser clad Ni-Al composite coatings on Cr12MoV steel

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