FIELD: machine engineering.
SUBSTANCE: pre-hardening, tempering and coating the product with a vacuum spraying method, cryogenic treatment of the product in a nitrogen gas environment at a temperature of -153 to -196°C for more than 24 hours followed with heating in it to room temperature are carried out, then a low temper is carried out at a temperature of 150 to 180°C followed by air cooling.
EFFECT: increase of products wear resistance and increase of operational durability.
2 cl, 2 tbl
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