论述了穿孔等离子弧焊熔池的形成机理 ,建立了运动等离子弧作用下穿孔焊接熔池的三维数值分析模型 ,对不锈钢板对接焊的穿孔熔池形成过程进行了计算机仿真 ,并给出熔池形状的可视化图形结果。 The formation mechanism of perforation plasma arc welding pool was discussed. The three-dimensional numerical model of perforation welding pool under the action of moving plasma arc was established. The forming process of perforation pool of butt welding stainless steel plate was simulated and the simulation results were given. Visualization of Shapes Results.