Heating magnetic metal workpieces

Details Heating magnetic metal workpieces Heating magnetic metal workpieces

1984-04-23

1986-10-28

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148121, 219 1041, 219 1057, 219 1071, H01F 104

Patent

active

046197176

ABSTRACT:
Method and apparatus for heating a billet of magnetic metal material to a forging or other elevated processing temperature above the Curie point temperature of the workpiece metal by first inductively preheating the billet in an induction heating coil to a preheat temperature not appreciably higher than the Curie point temperature of the workpiece metal, and then conveying the preheated billet from the induction heating coil into, and post-heating it to the elevated processing temperature within, the heating chamber of a slot-type high efficiency electric radiant heat electric furnace.

REFERENCES:
patent: 2980561 (1961-04-01), Ford et al.
patent: 3409480 (1968-11-01), Forslund
patent: 3419698 (1968-12-01), Palmero et al.
patent: 3421925 (1969-01-01), Hair et al.
patent: 3423253 (1969-01-01), Ames et al.
patent: 3469052 (1969-09-01), Hatchard

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