激光熔覆对304不锈钢表面摩擦磨损性能的影响  

Effects of laser cladding on friction and wear properties of 304 stainless steel

作　　者：冯爱新[1,2] 陈风国[2] 裴绍虎[2,3] 薛伟[1] 章正刚[2] 吕豫文[2] 庄绪华[2] 印成[2] 

机构地区：[1]温州大学机电工程学院,浙江温州325035 [2]江苏大学机械工程学院,江苏镇江212013 [3]常州光电技术研究院,江苏常州213164

出　　处：《材料热处理学报》2015年第8期223-228,共6页Transactions of Materials and Heat Treatment

基　　金：科技部中俄双边政府间2014-2015科技合作项目(CR17-11);浙江省国际科技合作专项(2013C14007);国家自然科学基金项目(51175237;51305050);温州市工业科技研究开发项目(J20130033)

摘　　要：采用激光熔覆对304不锈钢表面处理得到不同的熔覆层,研究了激光功率和粉末成分对涂层磨损量以及摩擦系数的影响。利用CETR UMT-2型摩擦磨损试验机进行干滑动磨损试验,采用SURFCOM 130A型粗糙度仪扫描熔覆层表面磨痕,采用ESM及EDS观察磨损表面形貌,分析其磨损形式。结果表明:C类涂层(Ni60:92%,C;2%,Mo S2:6%)在1.8 k W激光下制备的涂层C2的磨损量为1.452×10-2mm3,相对耐磨性达到基体的6.39倍,磨损形式主要为疲劳磨损,伴随轻微磨粒磨损;E类涂层(Ni60:92%,C:6%,Mo S2:2%)在2.0 k W激光下制备的涂层E3的磨损量仅为0.925×10-2mm3,耐磨性最好,磨损形式主要为磨粒磨损;添加润滑相的E3涂层的摩擦系数高于C2,但是在整个实验过程中比较稳定;磨损特性的改善表明石墨与Mo S2之间有良好的协同效应。Different cladding layers on the surface of 304 stainless steel were prepared by laser cladding. The effects of laser puwer and powder ingredient on wear volume loss and friction coefficient of the cladding layers were examined by dry sliding wear test on a CETR UMT-2 tester. The wear traces and worn surface morphology of the coatings were analyzed by a SURFCOM 130A roughmeter, SEM and EDS analysis. The results show that the coating of specimen C2 （92% Ni60, 2% C and 6% MoS2 ） prepared at laser power of 1.8 kW gives the wear volume loss of 1. 452 × 10-2 mm3 for which the relative wear resistance is 6. 39 times of that of the matrix, and the wear mechanism is fatigue wear with slight abrasive wear. The coating of specimen E（92% Ni60, 6% C and 2% MoS2 ） prepared at laser power of 2.0 kW gives the wear volume loss is 0. 925 × 10-2 mm3 ,which has the best wear resistance, the main wear mechanism is abrasive wear. Although the friction coefficient of the coating E3 is higher than that of specimen C2, it exhibits stable wearing behavior due to the synergistic effect of C and MoS2.

关 键 词：激光熔覆 摩擦磨损 激光功率 粉末成分 磨损机制 

分 类 号：TG178.1[金属学及工艺—金属表面处理]