company news about What are the steps of a railway wheel preparation method to optimize the strength and toughness relationship?

The company has developed a railway wheel preparation method for optimizing the strength and toughness relationship, which belongs to the field of railway wheel preparation. The present invention includes the following steps: S1, heating the blank wheel to a temperature of 90-110°C above the critical temperature Ac3, and then maintaining the temperature to a completely austenitized state; S2, transferring the wheel to a quenching table, using an intermittent quenching method, first using a flow rate Spray the wheel tread with the nozzle of L1 for short-term pre-cooling, and then use the nozzle with the flow rate of L2 to spray the wheel tread for tread quenching, L1=(1/5~1/4)L2; S3. Temper the wheel, and The finished wheel is obtained by subsequent processing steps. The invention aims at improving the fracture mechanical properties of the wheel rim without affecting the conventional mechanical properties such as the strong plasticity of the wheel steel, so that the wheel steel can obtain better strength and toughness. The matching relationship is used as a reference for the design and preparation of long contact fatigue life and high wear resistance wheels.