Method of plasma multiarc welding by permanently burning direct- current arcs

摘要

A method of plasma multiarc welding by permanently burning direct- current arcs of different polarities makes use of a plasma forming gas and shielding mediums and the arcs are located so that the adjacent arcs have opposite polarities, consisting, according to the invention, in that all arcs are started between nonconsumable electrodes and a workpiece or some arcs are started between nonconsumable electrodes and a workpiece and other arcs are started between consumable electrodes and a workpiece, the currents of all arcs and the distance between the arcs being set so that the ratio of the product of the currents of two adjacent arcs to the distance therebetween is equal or more than 6.10.sup. 3 A.sup.2 /cm.