ELECTRODE FOR THE ARC-PLASMA TORCH Russian patent published in 1995 - IPC

FIELD: metal working. SUBSTANCE: bush having the radial thickness from the side of the working face end not less than 0.25 mm is mounted between the emitting insert and the electrode holder. The bush is made of material having more work function than that of the material of the emitting insert. The bush can be made of silver, gold, platinum, rhodium, iridium, palladium, nickel and their alloys or of an alloy containing copper and of metals chosen from the group: silver, gold, platinum, rhodium, iridium, palladium, nickel and their alloys. The emitting insert can be made of hafnium, zirconium, tungsten and their alloys. EFFECT: facilitated manufacture. 4 cl, 6 dwg, 1 tbl