Wheel groupWheel and axle,Website:http://www.xqcranes.com, bearing and bearing box and other components of the wheel group.The wheel is used to support the crane and the load, and on the track to make the crane run back and forth. The main damage form of the wheel is wear, hardening layer crushing and pitting corrosion. The material of the wheel is generally adopted ZG430-640 cast steel. In order to improve the wear resistance and service life of the wheel surface, the surface should be treated by heat treatment, the surface hardness is HB300-350, the quenching depth is not less than 20mm.� � �� ����