Furnace for the heat treatment of drills

Details Furnace for the heat treatment of drills Furnace for the heat treatment of drills

1982-03-08

1984-04-10

Rutledge, L. Dewayne

Metallurgical apparatus

Means treating solid metal

266274, 266124, C21D 100

Patent

active

044416989

ABSTRACT:
The furnace effects a partial heat-treatment of drills and similar tools having a clamping portion and a working portion and with respect to which it is important to subjecting only the working portion, to a heat treatment, particularly hardening. The physical properties of the clamping portion are, retained essentially in their original state during the heat treatment. The furnace is provided with a tool receiver that cooperates with hearth-bottom plates that are traversed by cooling fluid. The tool receiver assures that the drills or other similar tools are maintained in their clamping portion at substantially the same temperature level during the heat treatment while the working portion of the tools is freely exposed to the heating and quenching.

REFERENCES:
patent: 1310074 (1919-07-01), Hadfield et al.
patent: 2321806 (1943-06-01), Gilbertson
patent: 2365183 (1944-12-01), Forsberg
patent: 3460815 (1969-08-01), Corteggiano et al.
patent: 3615927 (1971-10-01), Paulson

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