METHOD AND APPARATUS FOR TREATING SURFACE OF METAL BLANK BY ARC DISCHARGE Russian patent published in 1998 - IPC

FIELD: metal working. SUBSTANCE: method and apparatus provide formation, between main exposed part of anode and consecutive confined areas of the first surface of blank playing role of cathode, arc discharge in vacuum with current intensity at least 50 A and positive voltage-current gradient. Apparatus has casing with evacuation means and controlled gas supply means, at least one anode, blank-cathode with device for holding and displacing it within casing, means to generate arc between anode and blank-cathode, means to bind arc discharge to consecutive confined areas of blank-cathode surface, means to ensure uniform distribution of arc along anode, and means to provide relative displacement between blank-cathode and anode in desired direction. EFFECT: stabilized arc discharge state for required time to increase quality of treated surface. 31 cl, 15 dwg