摘要
首先总结了涂层材料元素组成对耐腐蚀性能的影响;其次,从钝化膜、显微组织、位错、低角度晶界、热腐蚀动力学等几个方面总结了其与耐腐蚀性的联系;第三,综述了 EHLA与场外辅助技术结合对所制备涂层耐腐蚀性的影响;最后,总结和展望了超高速激光熔覆所制备涂层耐腐蚀性能的强化方法.
Abstract
With the rapid advancement of industrial technology in recent years,there are higher re-quirements in better surface related performance,such as wear resistance,heat resistance,corrosion re-sistance etc.for some key industrial equipment components.Extreme high-speed laser material deposi-tion,as an emerging surface treatment technology,it subverts the traditional metal surface treatment pro-cess,using high-energy laser as the heat source,alloy powder as the cladding material.It realizes a sig-nificant increase in cladding efficiency through the optimal coupling of powder and laser,and improves the surface properties of the workpiece by cladding coating with special properties with high efficiency and excellent surface accuracy,which also provides many advantages for the preparation of corrosion-re-sistant coatings.This paper firstly summarizes the influence of the chemical composition of coating mate-rials on the corrosion resistance of coatings.Secondly,it summarizes the relation between passivation film,microstructure,dislocations,low-angle grain boundaries,and thermal corrosion kinetics.Thirdly,it re-views the effect of EHLA combined with off-site assisted technology on corrosion resistance.Lastly,it summarizes and outlooks on the enhancement methods of the corrosion resistance of the coatings pre-pared by ultrahigh-speed laser melting and cladding.
基金项目
湖南省科技人才托举工程(2023TJ-X10)
湖南省自然科学基金(2023JJ50108)
湖南省创新型省份建设专项科普专题(2023ZK4316)
湖南省高耐磨合金材料先进制造工程技术研究中心创新能力提升项目(2023ZYQ030)
湖南省应用特色学科材料科学与工程学科(湘教通[2022]351号)
衡阳市"小荷"科技人才项目(衡市科协字[2022]68号)
湖南省"机械工程"学科科技创新平台开放课题(KFKA2205)
湖南工学院自科培育项目(2022HY007)
国家级大学生创新创业训练计划项目(S202311528056X)
NETL
NSTL
万方数据