open keyhole laser welding 穿透型激光深熔焊接
A numerical method is presented for the two dimensional quasi steady state heat transfer on high power density laser welding processes according to the keyhole model.
对高能量密度激光匙孔焊接过程的二维准稳态传热进行了计算方法的研究。
The welding process is influenced by the plasma produced by laser irradiation. Plasma plume above the keyhole is the bright, often bluish, flash frequently seen during laser welding.
激光焊接中，光致等离子体的产生，尤其是小孔外闪烁的明亮蓝色等离子体云，影响着激光焊接过程的进行。
The main defects of laser spot welding of aluminum are crater, hot crack and porosity which created by oxide film and keyhole instability,.
焊点中存在的主要缺陷是气孔，表面下塌，热裂纹，其中气孔主要为氧化膜气孔和匙孔不稳定形成的气孔。
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