激光功率对0Cr13Ni4Mo不锈钢激光淬火组织性能的影响

Effect of Laser Power on Microstructure and Properties of Laser Hardened 0Cr13Ni4Mo Stainless Steel

为了研究激光淬火功率对水力机械过流部件0Cr13Ni4Mo不锈钢组织性能及抗磨损性能的影响,采用激光淬火功率分别为2.5,3.0,3.5 kW的半导体激光器进行表面淬火;利用显微硬度计、冲击韧性试验机、摩擦磨损试验机、扫描电子显微镜分别对3种不同功率的淬火层的显微硬度、冲击韧性、抗磨损性能进行分析与测试,并通过对涂层磨损微观结构的观察,分析涂层的磨损机理。结果表明:3种功率下的激光淬火层的显微硬度、抗冲击韧性、抗磨损性能均随激光淬火功率的增大而呈提高趋势。淬火层的磨损机理主要是黏着磨损。激光淬火0Cr13Ni4Mo不锈钢可显著提高基体的抗磨损性能,具有广泛的应用前景.

In order to study the the effect of laser quenching power on the microstructure and wear resistance of the 0Cr13Ni4Mo stainless steel of hydraulic mechinery flow passage component,semiconductor lasers with a laser quenching power of 2.5 kW,3.0 kW,3.5 kW respectively were used for surface quenching.The microhardness tester,impact toughness tester,friction and wear tester,and scanning electron microscope were used to analyze and test the microhardness,impact toughness and wear resistance of the three resulting quenched layers.By observing the wear microstructure of the coating,the wear mechanism of the coating was analyzed.Results showed that the microhardness,impact toughness and wear resistance of the laser quenched layer all increased with the rising of laser quenching power.The wear mechanism of the quenched layer was mainly adhesive wear.In general,laser quenching could improve the wear resistance of 0Cr13Ni4Mo stainless steel significantly and it had a prospect of wide application.