Process analysis of spindle heat treatment using medium frequency induction quenching equipment

The spindle is an important part of automobiles, machine tools, and grinders. It has to withstand huge friction during work. Therefore, production usually requires the spindle to have high hardness, high wear resistance, high service life, and high fatigue resistance. Performance etc. To meet these requirements, the core of the spindle needs to be quenched and tempered to (250±15) HBS, and the surface induction hardening hardness is ≥59HRC.

In order to meet the performance requirements of the spindle, many heat treatment manufacturers use medium frequency induction quenching equipment to heat treat it, with good results. The specific process is as follows:

1. Quenching and tempering: The temperature is 810°C. First, quench with salt water for 20 seconds, then oil-cool, then temper at 600°C and air-cool.

2. Induction quenching: After finishing the car, medium frequency induction quenching equipment is used for quenching heat treatment. GS-ZP-50, 2500Hz equipment is used. The parameters are shown in the table below.

3. Tempering: Medium frequency induction quenching equipment is also used, and the temperature is 160°C.

The hardness of both sides of the 20mm section and the cone section is allowed to be as low as 50HRC.

After heat treatment using the above process, the hardness of the spindle reaches the technical requirements and the service life is greatly improved. If you still don’t know anything about the above process, you can read more books on heat treatment.