On the Employment of Plasma Heating in Welding Processes

摘要

An experimental investigation was made of plasma heating in welding processes. The conclusions of the investigation are: Penetrating arcs of normal regime forming in tips with outer water cooling are energetically more appropriate than plasma streams corresponding to them in electrical power or in basic currents. The current of a penetrating arc should correspond to the diameter of the output duct of the forming tip. A current increase lowers heat distribution in the penetrating arc (above a certain limit), but is energetically indifferent for a plasma forming arc. An increase in gas consumption improves the conditions of utilizing arc energy. In the range of small consumptions the utilization of energy of plasma generating arc decreases considerably. The derived conclusions allow for a better and more rational evaluation of the propriety of using plasma heating in individual welding processes.