FIELD: process engineering.
SUBSTANCE: invention relates to machine building, particularly, to vacuum-chemical hardening of parts. Proposed process comprises preliminary annealing, mechanical processing and alphanising. Alphanising is carried out in electric furnace at 760÷780°C in vacuum of 10-1÷10-3 mm Hg for 1.5÷2 h. Then, the part is cooled, first, in vacuum together with furnace and, then, in atmospheric air to get alphanised 0.007-0.02 mm deep ply that features hardness of 600-900 HV.
EFFECT: simplified and accelerated process, higher surface hardness, non-polluting process.
2 dwg
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