中文摘要：

对QBe1.9铜合金进行双辉等离子Ti＋N共渗,在其表面制备富TiN合金层以改善该铜合金的摩擦磨损性能。采用扫描电镜、辉光放电光谱仪和X射线衍射仪等分析了Ti＋N共渗合金层的组织、成分及相结构,对该合金层的硬度进行分析,并利用往复球盘摩擦磨损试验机研究了QBe1.9基材及其Ti＋N共渗后的摩擦磨损性能。结果表明：经过Ti＋N共渗,QBe1.9合金表面形成了厚度约15μm的富TiN合金层。QBe1.9合金经Ti＋N共渗后其表面硬度达486HV,与基材相比有明显提高;其摩擦系数和磨损率与未处理基材相比均有明显降低,达到了良好的减摩耐磨效果。表面高硬富TiN合金层的形成是Ti＋N共渗处理改善QBe1.9铜合金表面性能的主要原因。

英文摘要：

Double glow plasma Ti＋N penetration for QBe1.9 Cu alloy was carried out. The wear resistance of Cu alloy improves by preparing TiN-rich alloying layer. The microstructure, composition and phase structure of Ti＋N penetration alloying layer were studied by using SEM, GDOES and XRD. The hardness of the alloying layer was analyzed. The friction and wear properties of QBe1.9 matrix and the matrix after Ti＋N penetration were studied by reciprocating hall-on-disk friction-abrasion testing machine. The results show that after Ti＋N treatment, TiN-rich layer with the thickness of 15μm forms on QBel.9 alloy surface. The surface hardness of QBe1.9 alloy after Ti＋N penetration is up to 486HV, which is higher than that of untreated QBe 1.9. The friction coefficient and wear rate of Ti＋N treated QBe 1.9 alloy reduce significantly compared with untreated QBe 1.9 alloy, which shows a good antifriction and wear resistance behavior. The improvement of the properties of QBe 1.9 alloy after Ti＋N treatment is attributed to the high hardness and TiN-rich layer forming on the surface.