FIELD: metallurgy.
SUBSTANCE: procedure consists in part heating, in nitriding during heating in nitrogen containing gas from 390 - 410°C to 500 - 570°C during 1 - 4 hours and in cooling from 500 - 570°C to 350 - 400°C during 40 - 60 minutes in plasma of glowing discharge directly upon heating.
EFFECT: upgraded quality and consumer qualities of threaded parts, increased efficiency and reduced expenditure of resources by nitriding during heating and cooling.
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