中文摘要：

对C61900铜合金镀钛-渗碳复合工艺进行了研究,首先采用了闭合场非平衡磁控溅射镀钛膜,再利用等离子体渗碳在铝青铜合金表面制备出了镀钛渗碳改性层;然后对改性层表面进行了硬度、摩擦磨损、SEM、EDS、XRD表征。结果显示：最佳等离子渗碳工艺参数为650℃保温时间6 h,将铝青铜表面硬度提高到了300 HV0.01以上,是铝青铜基体的3.8倍以上,并使其磨损率降低了近90%,解决了C61900铜合金表面硬度低耐磨性差的问题。

英文摘要：

Composite surface modification for C61900 copper alloy via titanizing and carburizing was investigated. Firstly,Ti film was deposited on the copper alloy substrate by closed field unbalanced magnetron sputtering,subsequently the plasma carburization was carried out on the Ti coated copper alloy. Then,the surface and cross-sectional morphologies and elements distribution in the composite modified layer were characterized by SEM,EDS and XRD. Additionally,the microhardness and wear resistance of the modified layer were also measured. The experimental results show that the best carburizing parameters are the plasma carburizing at 650 ℃ for 6 h,and the surface hardness of the modified C61900 copper alloy can be enhanced to over 300 HV0. 01 as 3. 8 times of that of the untreated one. Meanwhile,the wear rate decreased about 90% comparing with the untreated one. The problems of lower hardness and poor wear resistance of the C61900 copper alloy surface are solved.