METHOD OF COMBINED PLASMA TREATMENT OF THIN- WALLED CYLINDERS MADE FROM COMPLEX ALLOY STEELS Russian patent published in 2003 - IPC

FIELD: electrothermics; mechanical engineering; power engineering; nuclear industry. SUBSTANCE: combined plasma spraying or welding- on of working layer on outer surface of cylinder is performed at rotary motion of this cylinder. Pressure of 100 Pa is built up inside cylinder by means of vacuum system. Vacuum arc discharge at density of 60 kA/ sq m is excited and rigidly interconnected electrodes of vacuum-arc and plasma treatment are moved in synchronism. Ends of said electrodes are accurately opposite on either side of thin wall of cylinder. EFFECT: facilitated initiating of plasma; enhanced stability of process; improved quality of coats. 2 cl, 1 dwg, 1 ex