Water spray quenching technology for wheel treads of industrial and mining locomotives, cranes and the like

Abstract

The invention designs a surface quenching technology of loading wheels in a heat treatment furnace for heating and cooling by water spray quenching after the wheels are out of the furnace. A technical solution is as follows: according to a water spray quenching technology for wheel treads of industrial and mining locomotives, cranes and the like, the wheels are in a rotating state when water is sprayed. An apparatus of the technology adopts a steel beam is set up on a quenching water tank. After induction quenching, a hardening layer and a matrix are obviously layered with a transition layer thin, so that the hardening layer and the matrix are easy to crack when being heavily loaded. However, a transition layer between a hardening layer and a matrix of the wheel treads by the water spray quenching is relatively gentle and reasonable. The treads can bear greater impact and load. A water pump of the technology is put in a water tank; a motor is fixed on the wall of the water tank; a small sprocket wheel drives a large sprocket wheel; the upper side of the large sprocket wheel is connected with a circular turnplate; the center of the circular turnplate is welded with a tapered column for positioning a wheel lifting mould; and the wheels are put on the mould.

Description

technical field [0001] The invention relates to a surface heat treatment technology, which is mainly aimed at the water spray quenching technology of industrial and mining steel wheel treads. Background technique [0002] The hardened layer on the tread surface of industrial and mining steel wheels is generally 15mm-20mm, and the hardness requirement is high, generally above HB300. At present, this kind of wheel is generally heat treated in the industry by putting it into oil or water for cooling and quenching after power frequency induction heating. However, the hardness of oil quenching is relatively low, and the wheels with high hardness requirements must be quenched with water to be quenched, but water quenching is not easy to control, and it is easy to quench and crack, so it often causes great losses. Furthermore, the depth of induction heating is limited, and the frequency is also fixed. This makes the hardness gradient between the hardened layer and the core too lar...

AI Technical Summary

Problems solved by technology

This makes the hardness gradient between the hardened layer and the core too large, which increases the stress in the transition zone and reduces the life of the workpiece

If it is subjected to heavy loads, it is easy to cause the hardened layer to peel off from the core, causing accident damage

Images