When using a high-frequency induction heating machine to heat treat parts, what are the factors that affect its structural processability?

The main heat treatment process factors that affect the structure of parts are:

1) Selection of parts materials

2) Part geometry and stiffness

3) Size of parts

4) Surface condition of parts

In order to avoid excessive deformation, cracking, insufficient hardness and soft spots when parts are heat treated using high-frequency induction heating machines, the geometry of the parts is often the key. Sharp edges, corners and cavities will produce stress concentration, which is the main source of cracking; sudden changes in the cross-section of parts (such as threads, oil holes, keyways and undercuts, etc.) can also easily cause stress concentration; the microscopy of parts Uneven structure will cause uneven stress distribution during heat treatment, leading to deformation and cracking.

If there is no room for improvement in the structural shape of the part, materials with better hardenability can be used and quenched with a gentle cooling medium to avoid deformation and cracking.

The parts have poor stiffness and will undergo large deformation when heated or cooled by a high-frequency induction heating machine. Special fixtures can be designed to prevent deformation.

The surface condition of parts also has a great impact on heat treatment processability. The surface roughness value is low, the air film during quenching and cooling is not easy to adhere, and the cooling is uniform, which can reduce deformation. Knife marks on the surface and deep or inappropriate marks on the location may also cause cracking during heat treatment.