TC4钛合金表面激光熔覆TiO_(x)N_(y)熔覆层的微观组织与耐磨性能研究  

Microstructure and Wear Resistance of Laser Cladded TiO_(x)N_(y) Coating on TC4 Titanium Alloy Surface

作　　者：汪子琪 刘岚逸 汪冰峰[1] WANG Ziqi;LIU Lanyi;WANG Bingfeng(School of Materials Science and Engineering,Central South University,Changsha 410083,Hunan,China;Powder Metallurgy Research Institute,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]中南大学粉末冶金研究院,湖南长沙410083

出　　处：《矿冶工程》2025年第1期148-152,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金国际合作项目(52020105013)。

摘　　要：为了提升Ti-6Al-4V合金表面硬度与耐磨性,采用激光熔覆在Ti-6Al-4V合金表面制备了TiO_(2)和TiN混合熔覆层,研究了熔覆层的微硬度、耐磨损性能、微观结构及元素分布。结果表明:与基体相比,熔覆层表面硬度和耐磨性显著提升,TiO_(2)和TiN粉末质量比为1∶9且双层熔覆时,硬度和比磨损率可达1936.1HV0.1和2.06×10^(-14) mm^(3)/(N·m),分别为基体的5.4倍和3.26倍;熔覆层的主要成分为α-Ti、TiN、TiN_(0.6)O_(0.4),这是TiO_(2)-TiN混合熔覆层硬度和耐磨性显著提升的原因。研究结果为利用激光熔覆技术提高Ti-6Al-4V合金表面的硬度与耐磨性提供了理论和实验依据。In order to improve the surface hardness and wear resistance of Ti-6Al-4V alloy,a cladded coating of TiO_(2) and TiN was prepared on the surface of Ti-6Al-4V alloy by laser cladding,and the microhardness,wear resistance,microstructure and element distribution of the coating were explored.Compared to the substrate,the surface hardness and wear resistance of the coating are significantly improved.It is shown that with TiO_(2) and TiN powder in a mass ratio of 1∶9,the hardness and specific wear rate of the coating can reach 1936.1HV0.1 and 2.06×10^(-14) mm^(3)/(N·m),respectively,which are 5.4 times and 3.26 times those of the substrate.The main components of the coating includeα-Ti,TiN,and TiN_(0.6)O_(0.4),which is the reason for the significant increase in hardness and wear resistance of the TiO_(2)-TiN cladded coating.The research results provide a theoretical and experimental basis for improving the hardness and wear resistance of Ti-6Al-4V alloy by laser cladding technology.

关 键 词：表面处理 激光熔覆 TC4钛合金 微观组织 耐磨性 熔覆层 

分 类 号：TG174[金属学及工艺—金属表面处理]