Patent ID: 6087616
Filing Date: 2000-07-11
Classification: B23K,H05H

Abstract:
A method of plasma-arc welding of metals, comprising the following steps:striking a pilot electric arc between the electrode and the nozzle, said nozzle comprising an anode of the plasma-arc welding torch,approaching a plasma-producing medium to the arcing zone of said pilot arc, constricting the pilot arc with said plasma-producing medium in the nozzle of the welding torch, and producing a plasma jet as a result,establishing the main electric arc between the electrode of the plasma-arc welding torch and the metal being welded,stabilizing the main electric arc with said plasma jet and fusing the metal with said stabilized main electric arc,characterized in that used as the plasma-producing medium is water vapor and welding of metals is effected with a straight polarity of the main electric arc.