FIELD: mechanical engineering; instrumentation engineering; application of wear-resistant, insulating and decorative coats on articles. SUBSTANCE: parts are treated by spark discharge in gaseous medium containing element being introduced. During treatment part performs function of anode. Treatment is effected at frequency of 90-220 Hz and voltage of 12000 20000 V. After treatment in this mode, thickness of layer is equal to several hundreds of micrometers and possesses high adhesion to backing. EFFECT: improved quality of hardened layers on parts of any configuration made from any alloys. 1 ex
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