company news about What are the steps of the batch quenching method for railway wheels?

The company has developed an intermittent quenching method for railway wheels, which belongs to the field of heat treatment of railway wheels. The present invention is carried out according to the following steps: S1, heating the wheel as a whole to complete austenitization; S2, alternately performing water cooling and air cooling on the wheel to form a uniform fine pearlite+ferrite structure in the entire rim area; wherein cooling The process includes the first stage and the second stage. The water volume V1 in the first stage is less than the water volume V2 in the second stage. The number of alternating cycles of circulating water/air cooling in the first stage is N1, and the number of alternating cycles of circulating water/air cooling in the second stage is N2. N1>N2. The invention overcomes the problem of poor performance of the wheel caused by the conventional quenching method in the prior art, can effectively avoid the formation of an abnormal structure caused by the conventional quenching method in the near surface layer of the tread, reduce the depth of the abnormal structure as much as possible, thereby effectively improving the whole life cycle of the wheel Internal service performance, extending the service life of the wheel.