摘要
采用连续光纤激光器研究了12组(A~L组)不同激光参数对数控机床传动轴的表面氮化效果,从中选出了3组最佳参数研究了其渗氮后的组织与性能,以期为揭示表层氮化后的显微组织结构成分及其物理-机械行为等演变规律奠定基础。结果表明,当激光功率为1.2 kW、扫描速度为3 mm·s^(-1)时形成的渗氮层表面粗糙度最低,为Ra 1.6μm;显微组织不仅得到细化,也从回火索氏体变为由马氏体、碳化物、氮化物和基体组织组成的混合组织。此外,渗氮层的显微硬度、抗磨损性能以及抗拉强度均得到了相应的提高。
In this paper, a continuous fiber laser was used to study the surface nitriding effect on CNC machine drive shaft by 12 groups(Group A~L) of different laser parameters. Three groups of optimum parameters were selected to study the microstructure and properties after laser nitriding, in order to lay a foundation for revealing the evolution law of microstructure, composition, and physical mechanical behavior. The results show that when the laser power and scanning speed is 1.2 kW and 3 mm·s^(-1) respectively, the surface roughness of the nitrided layer is Ra=1.6 μm, which is the lowest compared with other parameters. The microstructure is not only refined, but also changed from tempered sorbite to a mixture of martensite, carbide, nitride, and matrix. In addition, the microhardness, wear resistance, and tensile strength of nitriding layer are improved accordingly.
作者
赵鹏展
Zhao Pengzhan(School of Information and Intelligent Manufacturing,Chongqing City Vocational College,Chongqing,402160,China)
出处
《应用激光》
CSCD
北大核心
2022年第9期66-73,共8页
Applied Laser
关键词
激光渗氮
数控机床
表面工程
组织性能
laser nitriding
CNC machine tool
surface engineering
microstructure and properties