论文部分内容阅读
引入经典光学理论计算激光束与粉末流的相互作用,藉此研究了送粉速率对工件表面激光强度分布和不同位置颗粒温度的影响。计算结果表明:随送粉速率的增加,激光强度以及颗粒温度的最高值都显著降低;同时,激光强度分布和不同位置颗粒温度趋于均匀。由于对激光熔池中动力学过程的潜在影响,这些结果应在描述激光熔覆过程的数学模型中加以考虑。
The classical optical theory is introduced to calculate the interaction between laser beam and powder flow. The effect of powder feeding rate on the laser intensity distribution and particle temperature at different positions is studied. The calculation results show that the laser intensity and the maximum particle temperature decrease significantly with the increase of powder feeding rate. At the same time, the laser intensity distribution and particle temperature at different positions tend to be uniform. These results should be considered in describing the mathematical model of the laser cladding process due to its potential impact on the kinetics of laser cladding.