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采用ＣＯ_２激光焊接１Ｃｒ１８Ｎｉ９Ｔｉ，激光深熔焊接的临界平均功率密度不仅随光斑大小而变化，而且与功率密度分布有关，而光斑内的最高功率密度却基本相同，提示应以光斑内的最高功率密度作为描述激光深熔焊接临界功率密度的依据。
The use of CO_2 laser welding 1Cr18Ni9Ti, laser deep penetration welding of the critical average power density varies not only with the spot size, but also with the power density distribution, and the maximum power density within the spot is basically the same, suggesting that the spot should be the highest power density as The basis for describing the critical power density of laser deep penetration welding.