可见增大送粉速率可以提高熔覆层的成形高度和宽度，但熔覆层的深度却逐渐减小。在聚焦光束能量密度一定时，送粉速率的增大会导致熔池内粉末总量的增多；粉末吸收的总能量增多，基体吸收的能量减少，当熔覆层凝固时，熔覆层的熔高和熔宽会有所增大，而熔深将会减小。

It can be seen that increasing the powder feeding rate can increase the forming height and width of the clad layer, but the depth of the clad layer gradually decreases. When the energy density of the focused beam is certain, the increase of the powder feeding rate will lead to the increase of the total amount of powder in the melt pool; the total energy absorbed by the powder will increase and the energy absorbed by the substrate will decrease, and the melt height and width of the melt layer will increase and the melt depth will decrease when the melt layer solidifies.