Induction hardening of valve seat inserts

Details Induction hardening of valve seat inserts Induction hardening of valve seat inserts

1980-09-19

1982-06-22

Albritton, C. L.

Electric heating

Metal heating

Of cylinders

219 95, 219 1057, 291567A, 29447, 148145, H05B 638, C21D 110

Patent

active

043364322

ABSTRACT:
An induction heating process for hardening a metal insert retained in a recess formed in a second component comprises the steps of fitting the insert in place within the recess by an interference fit, machining the interior surface of the insert, locating an induction heater adjacent the surface of the insert to be hardened, the heating element being spaced from the metal surface a predetermined distance, and energizing the heating element from the high frequency electrical power source for an extremely brief period.

REFERENCES:
patent: 2424794 (1947-07-01), Brown
patent: 2444259 (1948-06-01), Jordan
patent: 2757268 (1956-07-01), Edwards
patent: 2914641 (1959-11-01), Yuhasz
patent: 3022407 (1962-02-01), Robinson et al.
patent: 3240639 (1966-03-01), Lihl
patent: 3502837 (1970-03-01), Peehs
patent: 3505489 (1970-04-01), Tsuge et al.
patent: 3621550 (1971-11-01), Colestock
patent: 3737612 (1973-06-01), Pfaffmann
patent: 3837934 (1974-09-01), Pfaffmann et al.
patent: 4798141 (1957-07-01), Longacre

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