METHOD FOR THERMAL STRENGTHENING OF railway wheels TYRES

摘要

The invention relates to ferrous metallurgy. A method for thermal strengthening railway wheels tyres includes heating tyres stacks to a temperature of austenitizing 890-, holding at this temperature, rapid cooling of the tyres stacks in the hardening tank with water to the tempering temperature, and their tempering at a temperature of 490- during a period between 4 hours 30 minutes and 5 hours, at that in the hardening tank the auxiliary component is installed for formation a circular water layer thickness of 20- at the inner surface of the tyres stacks, stacks are placed on the supporting elements and cooled in water at 30-40 ° C for 150-180 sec. The technical result is obtaining high alloy plasticity and viscosity of the inner surface of the stacks with the high hardness of the outer surface (roll surface) of tyres.