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研究了激光感应复合快速熔覆(LIHRC)碳化钨金属陶瓷层的影响因素。结果表明,随着感应预热温度的增加,激光感应复合快速熔覆的效率增加;基材类型对激光感应复合快速熔覆的效率也有较大影响,这主要是由基材的热物理性能参数(如熔点、电阻率与磁导率)决定;随着激光比能与基材感应预热温度的增加,复合层的稀释率增加;随着粉末面密度的增加,复合层的稀释率降低。此外,在激光感应复合快速熔覆过程中,复合粉末的利用率不仅与激光工艺参数、感应预热温度有关,还与WC颗粒的含量以及粘结金属的种类有关。
The influencing factors of laser induced composite rapid cladding (LIHRC) tungsten carbide cermets were studied. The results show that with the increase of induction preheating temperature, the laser cladding rapid cladding efficiency increases; the substrate type also has a greater impact on the laser cladding rapid cladding efficiency, which is mainly determined by the thermal physical properties of the substrate parameters (Such as melting point, resistivity and permeability). With the increase of laser specific energy and substrate preheating temperature, the dilution rate of composite layer increases. With the increase of powder surface density, the dilution rate of composite layer decreases. In addition, during the laser cladding rapid cladding process, the utilization rate of the composite powder is not only related to the laser process parameters and the temperature of the induction preheating, but also to the content of the WC particles and the type of the binder metal.