摘要
采用不同激光功率在45钢表面熔覆Ni-60%WC涂层,并通过超景深显微镜分析了所制备的涂层微观组织。利用磨损试验机测试了激光功率对Ni-60%WC涂层摩擦学性能的影响,并建立磨损模型对磨损机理进行了探讨。结果表明,在激光功率为1400 W、1700 W、2000 W和2300 W时Ni-60%WC涂层的平均摩擦因数分别为0.291、0.375、0.338和0.261,对应的磨损率分别为26.48、21.44、30.24、27.36μm3/(N·mm),这表明在激光功率为1700 W时Ni-60%WC涂层的磨损率比在其他激光功率时Ni-60%WC涂层分别降低了19%、29%和22%,说明合适的激光功率可以改善其抗磨损性能。激光功率几乎对Ni-60%WC涂层的磨损机理没有影响,主要磨损机理为磨粒磨损和黏着磨损。
Ni-60%WC coatings were prepared on 45steel via the laser cladding process,employing various laser power settings.The microstructure of obtained coatings was analyzed using a super depth of field microscope.The effect of laser power on the tribological performance of Ni-60%WC coating was investigated using a wear tester,and the wear mechanism was discussed by the wear model.The results show that the average coefficients of friction of Ni-60%WC coating at the laser power of 1400,1700,2000and 2300Ware 0.291,0.375,0.338,and 0.261,respectively,and the corresponding wear rates are 26.48,21.44,30.24,and 27.36μm3/(N·mm),respectively.The wear rate of Ni-60%WC coating at the laser power of 1700W decrease by 19%,29%,and 22%compared with those at the laser power of 1400,2000and 2300W,respectively,which indicates that the appropriate laser power may improve its wear resistance.Furthermore,laser power exhibited negligible influence on the wear mechanism of Ni-60%WC coatings,with abrasive wear and adhesive wear identified as the primary modes of degradation.
作者
何闯
He Chuang(Jiangsu Yuanfang Power Technology Co.,Ltd.,Changzhou213017,Jiangsu,China)
出处
《应用激光》
CSCD
北大核心
2024年第3期40-50,共11页
Applied Laser
