Plasma-Arc Remelting of Titanium Alloys,

Vacuum plasma-arc melting has the following advantages over vacuum arc melting with the consumable electrode the possibility of the remelting of lump, noncompact charge the possibility of the velocity control of melting, maintaining metal in the molten state and, therefore, its additional degassing and, simpler vacuum equipment. Plasma-arc melting in vacuum 0.4-0.5 mm Hg. has advantages over plasma-arc melting in weakly rarefied atmosphere 75-100 mm Hg. the higher degree of degassing of melt the higher thermal efficiency of process the less consumption of working gas the possibility of using low-voltage current sources for vacuum arc furnaces.