激光技术2025，Vol.49Issue(2)：188-194,7.DOI:10.7510/jgjs.issn.1001-3806.2025.02.005
激光熔覆AlN/TiAl制备Ti-Al-N复合涂层及其摩擦性能研究
Preparation of Ti-Al-N composite coating by laser cladding AlN/TiAl and study of its wear performance
摘要
Abstract
In order to prepare wear-resistant titanium-based coating,a Ti-Al-N wear-resistant titanium-based coating was prepared on TC4 surface by laser cladding.The phase composition,microstructure evolution and hardness of the coating under different laser powers were observed and analyzed,and then the tribological properties of the composite coating in the air environment were analyzed.The results show that the strengthening phase of the coating is mainly composed of Ti2 AlN,TiN,TiAl and TixAlly.The diffraction peak intensity of each phase changes with the increase of laser power,and the matrix phase is composed of(γ-TiAl+α2-Ti3 Al).The coating is metallurgically bonded to the substrate.With the increase of laser power,the microstructure gradually changes from dispersed columnar crystals to coarse dendrites,but when the laser power was 2.4 kW,the microstructure becomes fine again.The microhardness of the composite coating can reach 2.14 times that of the substrate.In the air friction environment,different samples are mainly abrasive wear,and the matrix wear is serious.The coatings under different laser powers greatly improve the wear resistance of the substrate.The minimum wear rate of the coating was 0.786×10-4 mm3·N-1·min-1,and the matrix was 1.34×10-4 mm3·N-1·min-1.Therefore,the coating performance can be adjusted by controlling the laser power,which provides basic support for the application of laser cladding high wear-resistant titanium-based composite coatings in aerospace and marine equipment.关键词
激光技术/钛合金/激光熔覆/Ti-Al-N复合涂层/干摩擦磨损Key words
laser technique/titanium alloy/laser cladding/Ti-Al-N composite coating/dry friction and wear分类
金属材料引用本文复制引用
黄飞龙,肖华强,林波,莫太骞..激光熔覆AlN/TiAl制备Ti-Al-N复合涂层及其摩擦性能研究[J].激光技术,2025,49(2):188-194,7.基金项目
国家自然科学基金资助项目(52065009) （52065009）
贵州省科技计划资助项目(黔科合基础-ZK[2022]一般204) （黔科合基础-ZK[2022]一般204）
