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利用金相检测法 ,根据能量守恒 ,推导和计算了激光熔覆过程中单位时间激光热有效利用率 ,并分析了影响因素。结果表明 :在相同的送粉速率条件下 ,激光热有效利用率随扫描速度的增大而增大 ;在相同的扫描速度条件下 ,激光热有效利用率随送粉速率的增加而增大。对激光热有效利用率随扫描速度变化出现的最大值给出了解释
Based on the energy conservation, metallographic detection method was used to derive and calculate the effective utilization rate of laser heat per unit time during laser cladding and the influencing factors were analyzed. The results show that under the same conditions of powder feeding rate, the effective utilization rate of laser heat increases with the increase of scanning speed. Under the same scanning speed, the effective utilization rate of laser heat increases with the increase of powder feeding rate. The effective use of laser heat scan speed changes with the maximum given the explanation