金属热处理 ›› 2025, Vol. 50 ›› Issue (9): 1-6.DOI: 10.13251/j.issn.0254-6051.2025.09.001

• 组织与性能 •    下一篇

激光等离子复合喷涂NiCr-Cr3C2涂层的组织与性能

田育金1, 杨胶溪1, 高枫1, 王高生1, 刘琦2, 李怀学2   

  1. 1.北京工业大学 物理与光电工程学院, 北京 100124;
    2.中国航空制造技术研究院, 北京 100024
  • 收稿日期:2025-04-03 修回日期:2025-07-17 出版日期:2025-09-25 发布日期:2025-10-13
  • 通讯作者: 杨胶溪,教授,博士,E-mail: yangjiaoxi@bjut.edu.cn
  • 作者简介:田育金(1999—),男,博士研究生,主要研究方向为激光增材制造技术及应用,E-mail: 1261893323@qq.com。
  • 基金资助:
    国防基础科研计划(JCKY2022205B020)

Microstructure and properties of NiCr-Cr3C2 coatings prepared by laser-plasma hybrid spraying

Tian Yujin1, Yang Jiaoxi1, Gao Feng1, Wang Gaosheng1, Liu Qi2, Li Huaixue2   

  1. 1. School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, China;
    2. AVIC Manufacturing Technology Institute, Beijing 100024, China
  • Received:2025-04-03 Revised:2025-07-17 Online:2025-09-25 Published:2025-10-13

摘要: 以GH625高温合金为基体,采用NiCr-Cr3C2作为涂层粉末,通过激光等离子复合喷涂技术制备NiCr-Cr3C2涂层,对其组织和性能进行了分析,并与等离子喷涂进行对比。结果表明,激光等离子复合喷涂涂层表面平整、无裂纹,与基体冶金结合良好,结构均匀致密,平均孔隙率(0.66%)远低于等离子喷涂制备涂层孔隙率(6.61%)。较等离子喷涂涂层,复合喷涂涂层中非平衡相减少,形成了高密度细小均匀的二次Cr3C2硬质相,元素分布更加均匀,形成了明显的枝晶结构,使显微硬度和耐磨性能显著提升。

关键词: 激光等离子复合喷涂, 镍基合金涂层, 微观组织, 硬度, 耐磨性

Abstract: Microstructure and properties of a coating on GH625 superalloy prepared by laser-plasma hybrid spraying using NiCr-Cr3C2 powder were analyzed and compared with plasma spraying. The results show that the surface of the laser-plasma hybrid sprayed coating is smooth, without cracks, and has good metallurgical bonding with the substrate. The microstructure is uniform and dense, and the average porosity (0.66%) is much lower than that of the plasma sprayed coating (6.61%). Compared with plasma sprayed coating, the non-equilibrium phase in the hybrid sprayed coating is reduced, forming high-density, fine and uniform secondary Cr3C2 hard phase. The element distribution is more uniform, forming clear dendritic structure, which significantly improves the microhardness and wear resistance.

Key words: laser-plasma hybrid spraying, nickel-based alloy coating, microstructure, hardness, wear resistance

中图分类号: