穿孔等离子弧焊接工艺综述

摘要

This paper surveys the characteristics, classification and the parameters matching for the technology of keyhole plasma arc welding. Keyhole plasma arc welding can cause a special keyhole,with which welding speed, workpiece thickness and welding efficiency will be all increased significantly. It can be generalized to constant, pulsed, variable polarity and special plasma arc welding, so it can satisfy special requirements of many different industries. This paper is quite significant to guide welding practice and increase productivity and the quality of welding joints.%综述了穿孔等离子弧焊接工艺的特点、种类及工艺参数匹配与焊缝质量之间的关系等方面的问题.指出穿孔等离子弧焊具有特殊的"小孔效应",与钨极氩弧焊相比焊接速度、工件厚度和焊接效率都有了很大的提高.等离子弧焊接衍生出众多类型,包括直流等离子弧焊接、脉冲等离子弧焊接、变极性等离子弧焊接和特殊等离子弧焊接等,能够满足不同行业的特殊需求.本文对于指导实际焊接生产,进一步提高生产效率和焊缝质量具有重要的意义.