刀具表面激光熔覆高熵合金涂层的研究进展  

The Progress of High Entropy Alloys Coating Fabricated by Laser Cladding on Tool Steel

作　　者：薄盛宏 刘其斌[1,2] Bo Shenghong;Liu Qibin(College of Materials and Metallurgy,Guizhou University,Guiyang,Guizhou550025,China;Guizhou Province Key Laboratory of Materials Structure and Strength,Guiyang,Guizhou550025,China)

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]贵州省材料结构与强度重点实验室,贵州贵阳550025

出　　处：《应用激光》2022年第5期20-30,共11页Applied Laser

基　　金：国家自然科学基金面上项目(51671061);贵州省高层次创新型人才培养[黔科合人才(2015)4009]。

摘　　要：高熵合金具有很广泛的应用价值。目前,传统的铁基合金达不到高速切削的要求,为提高传统刀具材料在高速切削下的性能,国内外通过激光熔覆技术对传统刀具材料进行了改性。本文综述上述研究,同时也总结高熵合金块体与涂层的制备方法及研究现状。从热力学半经验判据设计合金成分出发,首先,介绍成分设计下的基础合金体系的显微组织与性能,探究添加不同合金化元素对涂层组织与性能的影响机制。其次,介绍退火和工艺参数对刀具表面激光熔覆高熔点高熵合金涂层的组织与性能的影响。最后展望高熔点高熵合金涂层的发展前景。High entropy alloys(HEAs)have very extensive application value.At present,traditional iron-based alloys cannot achieve the effect of high-speed cutting.In order to improve the performance of traditional tool materials in high-speed cutting,laser cladding technology was used to modify the traditional tool materials.In this paper,the previous researches are reviewed,and the preparation methods and research status of HEAs blocks and coatings are also summarized.This work is based on thermodynamic semi-empirical criterion for alloy composition design.The microstructure and properties of the basic alloy system under the composition design are introduced,and the influence mechanism of adding different elements on the microstructure and properties of the coating is explored.Secondly,the effect of annealing and process parameters on microstructure and properties of high melting point and high entropy alloy coating by laser cladding on tool surface is introduced.Finally,the development prospect of high melting point high entropy alloy coating is prospected.

关 键 词：高熵合金 激光熔覆 涂层 显微组织结构 力学性能 研究进展 

分 类 号：TG174.4[金属学及工艺—金属表面处理]