FIELD: mining industry. SUBSTANCE: method involves upsetting bead and subjecting it to final machining; holding blank under isothermal conditions for up to 72 hours at temperature of 490-520 C in the flow of ammonia dissociated to 70-90% and simultaneously exposing furnace atmosphere to charged particles emitted from surface of catalyst, which was preliminarily introduced into furnace working space. EFFECT: improved strength and increased service life of bars. 8 cl, 1 tbl
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