Heat treatment process of the valve rocker arm is quenched using an 80kw high-frequency induction heating machine

The valve rocker arm is an important part of the car. It has to withstand huge friction during work. In order to meet the working requirements of the rocker arm, many manufacturers use high-frequency induction heating machines for quenching heat treatment to improve its hardness, wear resistance and use. life. The rocker arm is a common part for us, but we don’t know much about its heat treatment process. Today, technicians from Zhengzhou Gou’s will tell you about the high-frequency induction quenching process of the valve rocker arm.

The material used for the valve rocker arm in the 4125 generator is ZG45 steel. Its pre-heat treatment is normalizing, and its hardness is 156~217HB. The pre- and post-processing steps are: milling the spherical surface and chamfering the end surface. Amount after treatment: 0.30mm. The technical requirements are: R14mm spherical surface high-frequency quenching, hardness ≥50HRC; quenching layer depth 2.3 ~ 5.3mm; depth measurement at the center of the arc when the spherical surface crosses. Metallographic structure: M + a small amount of troostite and a small amount of F. Key dimensions of the heating area of the part: R14mm spherical surface.

In order to meet its working performance requirements, valve rocker arm parts are usually quenched on an 80kw high-frequency induction heating machine. Its process parameters are shown in the following table:

High frequency quenching process parameters

The valve rocker arm parts require R14mm spherical surface heating and quenching. This type of quenching is a flat heating type quenching. Taking into account the particularity of the structure of the valve rocker arm parts, in order to ensure that the quenching working surface is heated evenly and that there is a certain depth of the quenching layer without being quenched through, a three-branch return type inductor is used. This type of inductor is mainly located in the middle The strip heating part can heat the end faces of multiple cylindrical workpieces at one time, which improves the heating efficiency and saves energy.

Zhengzhou Gou's is a manufacturer specializing in the production of high-frequency induction heating machines. It has a good understanding of equipment manufacturing and workpiece heat treatment. If you want to know more information about workpiece heat treatment, please feel free to leave us a message.