Single frequency induction hardening process

Details Single frequency induction hardening process Single frequency induction hardening process

1985-11-13

1987-01-27

Goldberg, Howard N.

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

291592, 148150, 219 1059, C21D 924

Patent

active

046392793

ABSTRACT:
The teeth and roots of a gear are contour hardened by induction at a single work station with a single solid state power supply. The inductor or coil is full-faced and encircles the gear during the preheat and final heat steps of the process. The power supply energizes the inductor with alternating current of a single frequency in the general range of 50-100 kHz according to a predetermined schedule of on-time and power level. The supply of current to the inductor is such that the time required for the supplied power level to achieve the scheduled power level in the final heat step is no more than approximately one-third of the scheduled final heat time.

REFERENCES:
patent: 2446202 (1948-08-01), Vang
patent: 3196244 (1965-07-01), Wulf
Metals Handbook, 9th Edition, vol. 4, "Heat Treating-Induction Hardening and Tempering", pp. 451-483.

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