METHOD OF ISOTHERMIC PLASMA-JET HARD-FACING OF SHAFTS Russian patent published in 1997 - IPC

FIELD: mechanized plasma-jet hard-facing of shafts and other bodies of revolution, in particular, of a small diameter. SUBSTANCE: before the hard-facing the limiting temperature saturation temperature of the part is determined. Hard-facing is conducted in a helix. In the process of hard-facing the are power is being varied so as to provide constant temperature conditions for formation of the deposited bead at stable temperature conditions at the preset level of the limiting temperature saturation. EFFECT: prevented excessive growth of temperature in the zone of formation of the deposited bead, limited increase of its size in the process of application of coating. 3 dwg