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系统地研究了Ni基合金自动送粉激光熔覆工艺参数对熔覆层稀释率的影响规律。为解释送粉速率和扫描速度对稀释率的影响 ,利用金相法检测了不同工艺条件下单道熔覆层的宏观参数 ,定量计算了LimL .C提出的单位质量熔覆材料的比能和单位时间实际输入的比能两个重要参数。利用单位质量熔覆材料的比能和单位时间实际输入的比能随工艺参数的变化规律 ,成功的解释了在激光参数一定的条件下稀释率随扫描速度的增加而减小 ,随送粉速率的增加而减小 ,为进一步研究熔覆层的凝固行为、显微组织与工艺参数的关系奠定了理论基础。
The effects of laser cladding parameters on the dilution rate of cladding layer were studied systematically. In order to explain the effect of powder feeding rate and scanning speed on the dilution rate, the macroscopic parameters of single pass cladding layer under different technological conditions were measured by metallographic method, and the specific energy per unit mass of cladding material and the unit time The actual input ratio can be two important parameters. Using the specific energy of the unit mass cladding material and the actual energy input per unit time with the variation of the process parameters, it is successfully explained that the dilution rate decreases with the increase of the scanning speed under certain laser parameters. With the increase of the powder feeding rate , Which laid a theoretical foundation for the further study of the solidification behavior of the cladding layer and the relationship between the microstructure and the process parameters.