摘要
激光熔覆作为一种新兴的材料表面加工技术,相比于其他表面改性技术具有不可比拟的优势,但存在基体热影响区性能恶化,熔覆层组织分布不均匀,熔覆层存在裂纹、气孔等缺陷。随着金属零部件表面性能需求的日益提高,激光熔覆的基体热影响区和熔覆层组织和性能亟待进一步提升。基于此,本文概述了热处理辅助、电磁场辅助、超声辅助等方式对激光熔覆层组织和性能的影响,综述了各种辅助处理方式对组织和性能影响的机理与组织转变机制,为激光熔覆层组织和性能优化提供参考,并指出了激光熔覆层组织和性能优化面临的挑战和未来发展方向。
As a new surface processing technology,laser cladding offers incomparable advantages over other surface modification technologies.However,the performance of the heat-affected zone of the matrix deteriorates,leading to non-uniform microstructures and the generation of defects such as cracks and pores in the cladding layer.With the increasing demand for the enhanced surface performance of metal parts,it is important to improve the heat-affected zone in the matrix and the microstructure of the cladding layer.In this regard,this paper summarises the influence of heat treatment-assisted,electromagnetic-assisted,and ultrasonic-assisted methods on the microstructure and properties of laser cladding layers.Further,the influence of the various methods on the mechanism of microstructure transformation is summarised.The results provide suitable directions for the optimisation of and further improvement in the microstructure of laser cladding layers,and the paper concludes by noting the challenges and future perspectives in this regard.
作者
刘卫东
米国发
李雷
陈晓文
潘雨佳
翟芳艺
苗浩伟
LIU Weidong;MI Guofa;LI Lei;CHEN Xiaowen;PAN Yujia;ZHAI Fangyi;MIAO Haowei(School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,Henan,China;School of Materials,Shanghai Dianji University,Shanghai 201306,China;Shanghai Jinbo Laser Technology Co.,Ltd.,Shanghai 201306,China)
出处
《材料导报》
CSCD
北大核心
2023年第15期196-202,共7页
Materials Reports
基金
上海市科委“科技创新行动计划”重大专项(19511105402)。
关键词
激光熔覆
热处理辅助
电磁场辅助
超声辅助
组织和性能优化
laser cladding
heat treatment aid
electromagnetic field assist
ultrasonic assisted
organizational performance optimization
