摘要
利用激光熔覆技术制备Ni基合金涂层,可以改善工件的表面硬度和耐磨性。为了进一步提高Ni基合金涂层硬度和耐磨性,对要求高硬度高耐磨性的零件进行修复,引入硬质相形成硬质相增强的Ni基复合熔覆层是国内外研究者的研究热点之一。通过对相关研究进行综述,全面总结了硬质相种类、尺寸及含量、硬质相的溶解行为以及外加元素等关键变量对硬质相增强Ni基复合熔覆层性能影响机理的最新进展,同时也指出了裂纹、气孔等缺陷控制是目前研究中存在的主要问题。最后,针对激光熔覆硬质相增强复合熔覆层性能提升以及缺陷控制问题,从专用粉末成分设计、硬质相梯度分布以及外部辅助手段几方面对未来的工作进行了展望。
Ni base alloy coating prepared by laser cladding technology can improve the surface hardness and wear resistance of the workpiece. In order to further improve the performance of the Ni-based alloy cladding layer and repair components which require high hardness and high wear resistance, the introduction of a hard phase to form a hard phase-reinforced Ni-based composite cladding layer is one of the research hotspots of researchers in China and abroad. Based on the review of relevant studies, the latest progress on the influence mechanism of the key variables such as the type, size and content of the hard phase, the dissolution behavior of the hard phase and the added elements on the performance of the hard phase reinforced Ni-based composite cladding layer was summarized. At the same time, it was pointed out that the control of defects such as cracks and pores was the main problem in the current research. Finally, the future work was prospected from the aspects of special powder composition design, hard phase gradient distribution and external auxiliary means, hard phase gradient distribution and external auxiliary means.
作者
武姜汝
冯校飞
韩日宏
齐海波
WU Jiangru;FENG Xiaofei;HAN Rihong;QI Haibo(School of Materials Science and Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Key Laboratory of Hebei Province Traffic Engineering Material,Shijiazhuang 050043,China)
出处
《热加工工艺》
北大核心
2022年第14期18-22,共5页
Hot Working Technology
基金
国家自然科学基金项目(51705345、51775359)
河北省重点研发计划项目(18211813D)
河北省自然科学基金项目(E2017210054)
河北省教育厅青年拔尖项目(BJ2018034)。
关键词
激光熔覆
硬质相增强
NI基合金
laser cladding
hard phase enhancement
Ni-based alloy
