激光扫描速度对40Ct钢激光表面合金化层组织性能的影响

Effect of Laser Scanning Speed on Microstructures and Properties of 40Cr by Laser Surface Alloying

为了改善金属拉拔卷筒40Cr铜的性能，采用Mo制成合金粉末，用CO2激光对卷筒表面进行激光合金化处理。研究激光合金化的工艺参数，对不同扫描速度下合金化层的质量进行比较并对其组织进行分析。结果表明：激光合金化工艺参数为：功率P=2．0kW，焦距f=315mm，搭接率为40％，扫描速度V=6mm／s，获得的合金化层具有良好的组织和性能，没有裂纹产生，未发现不熔物，组织较均匀。

In order to improve the metal drawing 40Cr steel drum performance, the use made of Mo alloy powder, with a CO2 laser on the drum surface laser alloying treatment. The process of laser alloying parameters of different scanning speeds the quality of the alloyed layer comparison and analysis of their organizations. The results showed that： the laser alloying process parameters： Power P = 2. 0kW, focal length f = 315mm, 40% overlap, scanning speed V = 6mm / s, gain alloy layer has a good organization and performance, there is no crack Have not found things do not melt, the organization is uniform