Purpose “Contour Hardening Pattern Formation Using Dual Frequency“
· High power rapid heating process - Rapid heating within 1s using high power over 1MW
· Energy saving with charge / discharge type
· Process simplification - Low deformation method can eliminate straightening and grinding process after heat treatment
· Uniform hardening pattern - Inside the gear, the thermal effect is small, so the material hardness is almost maintained.

Characteristic
- In the case of a single frequency, the eddy current generation position is different according to the frequency, so un uniformity hardening occurs and deformation causes noise and durability problems.
- When the two frequencies are used in a time division system, eddy currents flow as a whole and a uniform hardening pattern can be formed, thereby producing a high-quality product having low deformation and high durability.