| 2007 №08 (03) | 2007 №08 (05) |
The Paton Welding Journal, 2007, #8, 18-22 pages
HHeating by plasma arc of flat electrode axially fed into plasmatron
V.V. Chigarev, K.A. Kondrashov, N.A. Makarenko, N.A. Granovsky
Priazovsky State Technical University, Mariupol, UkraineAbstract
The paper presents the data on heating of a flat electrode (flattened flux-cored wire) inside the plasmatron by the plasma arcs during plasma surfacing by the combined method. It is established that application of the pulsed mode of plasma arc running, in which the flat electrode periodically becomes the cathode relative to the plasmatron nonconsumable electrode, improves its heating efficiency, while the proneness of the process to shunting of plasma arcs by the flat electrode is enhanced.
Keywords: plasma surfacing, combined method, plasma arc, heat input into flat electrode, pulsed mode, double arc formation, shunting of plasma arc, active cathodic spots of arc
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