METHOD OF CHEMICAL-THERMAL TREATMENT OF FRICTION PAIR PARTS MADE OUT OF STEEL

摘要

FIELD: metallurgy.;SUBSTANCE: nicotriding of parts is performed in mixture, containing charcoal carburiser, carbamid and Trilon-B. Nicotriding is carried out at 600-700°C with conditioning during 4-6 hours. Then contact copper coating is performed by means of holding parts in a 5-10% water solution of blue stone (CuSO₄ 5H₂O) within 10-30 minutes. After that the parts are dried at 100-120°C during 45-60 minutes and working surfaces of parts are grinded in. In particular cases of this invention application copper coating of parts is carried out directly from the temperature of nicotriding, for example after their cooling up to 100-80°C or after their cooling up to an ambient temperature.;EFFECT: upgraded wear resistance of formed layers on working surfaces of steel friction pair parts due to improved tribological characteristics and contact strength.;4 cl, 5 dwg, 1 tbl, 3 ex