Ti_2AlNb基O相合金双辉等离子渗碳层摩擦磨损性能

Friction and wear properties of double glow plasma carburized layer of Ti_2AlNb base O phase alloy

利用双层辉光等离子表面合金化技术在Ti2AlNb基O相合金表面进行渗碳处理,采用SEM、EDS、XRD、硬度仪及摩擦磨损试验机对其组织成分、元素分布、相组成、硬度及耐磨性能进行研究。结果表明,在Ti2AlNb基O相合金表面形成了约30μm的渗碳层,渗碳层表面硬度为1053 HV0.1,且硬度随渗层厚度梯度递减。渗碳层和基体平均摩擦因数分别为0.4和0.75,渗碳层比磨损率为基体比磨损率的1/17。双层辉光等离子渗碳技术明显提高了Ti2AlNb基O相合金的耐磨性。

Double glow plasma carburized layer was carried out on the surface of Ti2A1Nb base O phase alloy to improve its wear-resistance. The microstructure, element distribution, phases, hardness and wear resistance of the carburized layer were analyzed by SEM, EDS, XRD, hardness tester and friction wear testing machine. The results show that a carburized layer is formed about 30 μm, and surface hardness of the carburized layer is 1053 HV0.1 and it gradually decreases along the depth. The general friction coefficient of the carburized layer and matrix is 0.4 and 0.75, respectively. The specific wear rate of carburized layer is 1/17 of the matrix. The wear resistance of Ti2AlNb base O phase alloy is improved significantly by plasma carburizing.