摘要
为了提高钛合金的滚动接触疲劳性能,以碳化钨(WC)/钛合金(TC18)混合粉末为原料,利用激光熔覆技术在TC18基材表面制备了耐磨涂层,分析了涂层的显微组织和显微硬度,在室温条件下测试了涂层的接触疲劳性能。结果表明,涂层与基体冶金结合良好,WC颗粒呈不规则块状均匀分布于β-Ti基体中,WC显微硬度在2122~2271HV之间。与传统钛合金表面超声速火焰喷涂WC-Co涂层相比,激光熔覆复合涂层的滚动接触疲劳性能改善,但耐磨性能降低。
In order to improve the rolling contact fatigue property of titanium alloy,tungsten carbide(WC)/titanium alloy(TC18)mixed powder was used as raw material to prepare wear-resistant coating on TC18 substrate surface by laser cladding technology.The microstructure and microhardness of the coating were analyzed.The contact fatigue property of the coating was tested at room temperature.The results showed that the laser cladding coating is metallurgically bonded to the substrate.The WC phase uniform distributes over theβ-Ti matrix as irregular block structure,and the microhardness of which is in the range of 2122~2271HV.Compared with WC-Co coating sprayed by supersonic flame on the surface of traditional titanium alloy,the rolling contact fatigue property of composite coating strengthened by laser cladding was improved,but the wear resistance was decreased.
作者
刘育斌
冯成慧
朱小军
王志刚
冯军
Liu Yubin;Feng Chenghui;Zhu Xiaojun;Wang Zhigang;Feng Jun(AVIC The First Aircraft Institute,Xi'an 710089,China)
出处
《航空科学技术》
2022年第3期86-90,共5页
Aeronautical Science & Technology
关键词
钛合金
激光熔覆
复合涂层
滚动接触疲劳
耐磨性
titanium alloy
laser cladding
composite coating
rolling contact fatigue
wear resistance
