摘要
通过添加MoS2固体自润滑相,利用激光熔覆技术在TC4合金基材表面制备TC4/N i/MoS2复合材料,获得冶金质量较好的熔覆层。对激光熔覆层用扫描电境(SEM)进行形貌观察,并进行能谱成分分析,用XRD进行合金物相的表征,用MMG-10型高温高速摩擦磨损试验机对MoS2/Ti基涂层的摩擦性能进行测试。研究结果表明,TC4/Ni/MoS2复合涂层摩擦系数比TC4激光涂层显著降低,高温摩擦系数减小尤为明显,而且随添加MoS2含量的增多,涂层摩擦系数有减小的趋势,对比TC4激光涂层和复合涂层的磨耗,TC4/N i/MoS2复合涂层的磨耗显著低于TC4涂层,其耐磨性提高约9倍。
Ti-based alloy coating with the additions of MoS2 solid lubricants was successfully prepared on TC4 substrate by means of laser cladding.The quality of coating was relatively high and had metallurgical bonding with the substrate.The morphology of laser cladding layer was observed by SEM,composition analysis was applied by EDS,and the phase composition was characterized by XRD.Elevated temperature frictional behaviors of MoS2/Ni composites were investigated on MMG-10 wear machine.The results show that the friction coefficient of TC4/Ni/MoS2 coating is obviously reduced,especially during the high temperature.In addition,with the increase of MoS2 from 0 to 8%,the friction coefficient of coating decreases gradually.The wear losses of composite coatings are significantly lower than that of the TC4 coating.The composite coatings have excellent wear resistance and antifriction property.The wear resistance of TC4/Ni/MoS2 coatings is nine times higher than that of TC4 coatings.
出处
《金属热处理》
CAS
CSCD
北大核心
2011年第8期93-96,共4页
Heat Treatment of Metals
基金
国家自然科学基金项目(50971004)
北京市自然科学基金(3092008)
北京市教委科研计划(KM200910005022)
关键词
激光熔覆
二硫化钼
自润滑
摩擦性能
laser cladding
MoS2
self-lubrication
friction behavior
作者简介
杨胶溪（1971-），男，山东青岛胶州人，副研究员，博士，主要从事激光表面改性技术的研究及应用，已发表论文45余篇，获得山东省科技进步二等奖和中国高校科技进步二等奖各1项。联系电话：010-67392701，13641384625，E—mail：yangjiaoxi@bjut．edu．cn
