Process analysis of heat treatment of automobile steering knuckle using medium frequency induction heating machine

The automobile steering knuckle is an important security component of the automobile and is mainly composed of universal joint forks, cross shafts, bearings and other parts. It mainly bears the role of bending load, that is, it bears the role of bending and torsion stress. Therefore, automobile steering knuckles are required to have high hardness, wear resistance and service life. At this time, quenching heat treatment becomes more and more important. Today, Zhengzhou Gou's technical staff will tell you about the medium-frequency heat treatment process of automobile steering knuckles.

It can be seen from the material and working conditions of the automobile steering knuckle that it is first subjected to quenching and tempering treatment to ensure that the strength of the matrix meets the requirements, and then a medium frequency induction heating machine is used for surface quenching. Surface quenching is carried out using a special half-turn inductor, and a cylindrical inductor is used for medium-frequency induction heating. The specific process parameters are as shown in the following table:

Electrical parameters and quenching process specifications for medium-frequency induction heating of automotive steering knuckles

After the steering knuckle has been subjected to medium frequency induction quenching and low temperature tempering, the number of bending fatigue times can be increased by tens to hundreds of times compared with other ordinary heat treatments. The reason is that on the basis of the quenching and tempering treatment, medium frequency quenching is performed, which is equivalent to the steering knuckle. Surface strengthening treatment is carried out, which is the result of a large amount of compressive stress on the surface. The induction coil has a half-circle structure, which is characterized by uniform heating of the steering knuckle shaft diameter, fillet and end face, and reasonable distribution of the hardened layer. At the same time, the heating temperature and hardened layer can be adjusted to facilitate mass production.

Today, the technical staff of Zhengzhou Gou's gave you a brief introduction to the heat treatment process of automobile steering knuckles. I hope it will be helpful to your work. As an important part of the car, the quality of the steering knuckle plays an important role in the overall operation of the car. Nowadays, accidents caused by poor quality of steering knuckles are very common in society. Let us work together to improve the quality of steering knuckles and slow down the occurrence of accidents.