金属热处理 ›› 2022, Vol. 47 ›› Issue (6): 202-207.DOI: 10.13251/j.issn.0254-6051.2022.06.038

• 表面工程 • 上一篇    下一篇

TC4钛合金表面沉积CrAlSiN涂层的组织与性能

吴一若1,2, 谢峰3, 张月霞3, 张毓军3, 刘满红3, 胡瀚杰4, 陈全龙4, 周志明1   

  1. 1.重庆理工大学 材料科学与工程学院, 重庆 400054;
    2.重庆建设工业(集团)有限责任公司, 重庆 400054;
    3.重庆铁马工业集团有限公司, 重庆 400050;
    4.重庆交通大学 绿色航空技术研究院, 重庆 401135
  • 收稿日期:2022-01-09 修回日期:2022-05-05 出版日期:2022-06-25 发布日期:2022-07-05
  • 通讯作者: 周志明,教授,博士, E-mail:zhouzhiming@cqut.edu.cn
  • 作者简介:吴一若(1994—),男,硕士研究生,主要研究方向为材料表面改性与强化,E-mail:wuyiruo0529@163.com。
  • 基金资助:
    重庆市技术创新与应用产业类重点项目(cstc2019jscx-zdztzxX0072);重庆市英才计划(2020RC22);重庆市巴南区科技项目(2021TJZ013)

Microstructure and properties of CrAlSiN coating deposited on TC4 titanium alloy

Wu Yiruo1,2, Xie Feng3, Zhang Yuexia3, Zhang Yujun3, Liu Manhong3, Hu Hanjie4, Chen Quanlong4, Zhou Zhiming1   

  1. 1. School of Material Science and Engineering, Chongqing University of Technology, Chongqing 400054, China;
    2. Chongqing Jianshe Industry (Group) Co., Ltd., Chongqing 400054, China;
    3. Chongqing Tiema Industries Group Co., Ltd., Chongqing 400050, China;
    4. Green Aviation Technology Research Institute, Chongqing Jiaotong University, Chongqing 401135, China
  • Received:2022-01-09 Revised:2022-05-05 Online:2022-06-25 Published:2022-07-05

摘要: 为了提高TC4钛合金表面硬度和耐磨性能,通过等离子渗氮技术和多弧离子镀技术相结合的方法对TC4钛合金进行表面改性处理。通过扫描电镜、维氏显微硬度计、三维轮廓仪、高速往复摩擦磨损试验仪和电化学工作站,对比研究了TC4钛合金、渗氮层和CrAlSiN涂层的显微组织、硬度、耐磨性能和耐腐蚀性能。结果表明,经渗氮处理后,TC4合金表面渗氮层硬度提高了约2倍,在此基础上制备的CrAlSiN涂层的平均硬度高达3222 HV0.025,涂层表面存在少许大颗粒和凹坑;CrAlSiN涂层平均摩擦因数为0.22,磨损机理主要为粘着磨损,对磨副的材料粘着到涂层表面,而涂层几乎无磨损,耐磨性能显著提高。CrAlSiN涂层的自腐蚀电位为-0.542 V,比TC4钛合金基体的自腐蚀电位-0.747 V正移了0.205 V,表明在渗氮层基础上沉积CrAlSiN涂层显著提高了合金的耐电化学腐蚀性能。

关键词: TC4钛合金, 多弧离子镀, 等离子渗氮, CrAlSiN涂层, 耐磨性能

Abstract: In order to improve surface hardness and wear resistance of TC4 titanium alloy, the surface modification on the alloy was carried out by a combination of plasma nitriding and multi-arc ion plating technology. Microstructure, hardness, wear resistance and corrosion resistance of the TC4 titanium alloy, nitrided layer and CrAlSiN coating were studied by means of scanning electron microscopy, Vickers microhardness tester, three-position profiler, high-speed reciprocating friction and wear tester and electrochemical workstation. The results show that after nitriding treatment, surface hardness of the TC4 alloy is increased by about 2 times. The average hardness of the CrAlSiN coating prepared on this basis is as high as 3222 HV0.025, and there are a few large particles and pits on the coating surface. The average friction coefficient of the CrAlSiN coating is 0.22, and the wear mechanism is mainly adhesive wear. The material of the grinding pair adheres to the surface of the coating, and the coating is almost wear-free, and the wear resistance is significantly improved. The self-corrosion potential of the CrAlSiN coating is -0.542 V, which is 0.205 V higher than that of the TC4 titanium alloy substrate (-0.747 V), indicating that the electrochemical corrosion resistance of the CrAlSiN coating deposited on the basis of nitrided layer is significantly improved.

Key words: TC4 titanium alloy, multi-arc ion plating, plasma nitriding, CrAlSiN coating, wear resistance

中图分类号: