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在分析自动送粉式激光熔覆过程中熔覆材料颗粒加入方式及其在激光束中的行为的基础上，建立热平衡方程，推导出反映熔覆过程实际情况的参数：熔覆材料颗粒尺寸、在激光束中运动距离、加热温度、激光功率密度之间的相互关系式等。指出在自动送粉式激光熔覆中能够获得最佳熔覆层的必要条件是：熔覆材料颗粒进入激光束后直到其落到基体材料表面之前，必须始终在激光束中。激光束沿着扫描方向必须有足够的宽度是满足上述条件的关键，同时提出其计算方法及公式，并阐明获得最佳熔覆层的工艺参数之间的匹配原则
On the basis of analyzing the way of adding cladding particles and their behavior in laser beam during automatic powder feeding laser cladding process, the heat balance equation is established and the parameters reflecting the actual situation of cladding process are deduced: the grain size of cladding material, The relationship between the laser beam moving distance, heating temperature, laser power density and so on. It is pointed out that the necessary conditions for obtaining the optimal cladding in automatic powder delivery laser cladding are that the cladding material particles must always be in the laser beam after they enter the laser beam until they fall on the surface of the substrate. The laser beam must have sufficient width along the scanning direction is the key to meet the above conditions, while its calculation method and formula, and to clarify the principle of matching the process parameters to obtain the best cladding