FIELD: metallurgy.
SUBSTANCE: invention can be used for treatment of long-length precision cylinders of well pumps operating under abrasive wear conditions. The procedure for ion-vacuum nitriding long-length steel part in glow discharge consists in heating part at temperature 400-450°C, in isothermal conditioning during 20-30 minutes, in preliminary nitriding at temperature 480-510°C for 60-120 minutes, in final nitriding at temperature 20-50°C above temperature of preliminary nitriding during 8-16 hours and in cooling to 350-400°C during 40-60 minutes.
EFFECT: production of part with uniform nitrided layer and hardness of surface.
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