The selection of the induction heating equipment with unsuitable frequency affects the quality of the heating of the work piece: the power size; the problem of determining the heating speed and processing efficiency of the work piece; the heating time is slow, the work efficiency is low, the heating is uneven, and the temperature can not reach the requirement, which may cause the damage of the work piece and cause the opposite effect.

How to choose the correct frequency? Please remember the following words: 

(1)The larger the diameter of the work piece is, the lower the frequency is.

(2) The more shallow the quenching layer is, the higher the frequency should be.

(3) The larger the volume of the welding is, the lower the frequency is.

The advantages of induction heating equipment compared with common heating equipment are: 

1.The heating speed is very fast, which can expand the range of A bulk transition temperature and shorten the transformation time.

2. After heating , extremely fine hidden marten site can be obtained on the surface of the work piece, and the hardness is slightly higher (2 ~ 3HRC). Low brittleness and high fatigue strength.

3.The work piece processed by this process is not easy to oxidize and decarburization, and even some work piece can be directly assembled after processing. 

4. The hardened layer is deep and easy to control operation