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为了有效延长材料和设备的使用寿命、改善其表面状态,使其性能更好地发挥;探讨激光扫描速度对熔覆层耐磨性的影响;对比单道和大面积激光熔覆层的耐磨性。采用CO2激光器及LASERCELL-1005六轴六联动三维激光加工机床在40Cr钢上进行激光熔覆处理。利用X射线衍射仪、显微硬度计、磨料磨损试验机等设备对熔覆层硬度、耐磨性能进行研究。结果表明:激光熔覆层的显微硬度HK在4200～17792MPa之间;随扫描速度的的增加,激光熔覆涂层的最高硬度及耐磨性呈现先升高后降低的趋势;大面积激光熔覆层的硬度、耐磨性能不及单道激光熔覆层,原因在于大面积激光熔覆过程中受到重复加热的影响,易使硬度下降并产生裂纹;多层叠加熔覆涂层的硬度及耐磨性能优于多道搭接熔覆涂层。
In order to effectively extend the service life of materials and equipment to improve the surface state, to make its performance better play; laser scanning speed on the wear resistance of the cladding; contrast single-and large-area laser cladding wear Sex. CO2 laser and LASERCELL-1005 six-axis three-dimensional laser processing machine tool 40Cr steel laser cladding. The hardness and wear resistance of cladding layer were studied by X-ray diffractometer, microhardness tester and abrasive wear tester. The results show that the microhardness (HK) of the laser cladding layer is between 4200 and 17792MPa. With the increase of the scanning speed, the highest hardness and wear resistance of the laser cladding coating firstly increase and then decrease. The large area laser The reason is that the hardness and wear resistance of the cladding layer are less than that of the single laser cladding layer. The reason is that the hardness of the cladding layer is reduced and cracks occur due to the repeated heating during the laser cladding. The hardness of the multilayer cladding layer and Wear resistance is better than lap coating.