摘要
采用激光熔覆技术在斜齿轮钢表面制备Fe基熔覆层。通过光学显微镜、显微硬度计对熔覆层进行金相组织与显微硬度分析,采用磨损机对熔覆层和基材进行摩擦实验。结果表明:当激光功率为750W,送粉速率为20g/min,扫描速度10mm/s,离焦量为16.4mm时,铁基熔覆层与基体结合界面有明显的白亮带,激光熔覆效果较好,熔覆层的显微硬度值分布在845.3HV至955.6HV之间,约为基体硬度(419.7HV)2倍;熔覆层摩擦磨损性能得到了提高;熔覆层显微组织为均匀而细小的铁素体和珠光体,力学性能优于基体材质。
Laser cladding technology is used to prepare Fe-based cladding layer on the surface of helical gear steel. The metallographic structure and microhardness of the cladding layer are analyzed by optical microscope and microhardness tester, and use abrasion machine to perform friction experiment on the cladding layer and the substrate. The results show that when the laser power is 750 W, the powder feeding rate is 20 g/min, the scanning speed is 10 mm/s, and the defocus is 16.4 mm, there is a clear white band at the interface between the iron-based cladding layer and the substrate, and the laser cladding effect is better. The hardness value of the cladding layer ranges from 845.3 HV to 955.6 HV, which is about 2 times the hardness of the matrix(419.7 HV), the friction and wear performance of the cladding layer has been improved, the microstructure of the cladding layer is uniform and fine ferrite and pearlite, and the mechanical properties are better than the matrix Material.
作者
杨韩
王洪建
张绍军
周志杰
YANG Han;WANG Hongjian;ZHANG Shaojun;ZHOU Zhijie(School of Mechanical Engineering,Chongqing Technology and Business University,Chongqing 400067,China)
出处
《光学技术》
CAS
CSCD
北大核心
2021年第3期305-309,共5页
Optical Technique
基金
国家重点研发计划(2018YFB1306602)
重庆市技术创新与应用发展专项面上项目(cstc2019jscx-msxmX0032)。
