Pack carburizing process for earth boring drill bits

Details Pack carburizing process for earth boring drill bits Pack carburizing process for earth boring drill bits

1985-12-06

1987-02-17

Parker, Roscoe V.

Metal tools and implements, making

Blank or process

Drill

148 19, C21D 922

Patent

active

046430512

ABSTRACT:
A method of manufacturing an earth boring bit of the type having a bearing pin which extends from a head section of the drill bit for rotatably mounting a cutter. A container is provided having opposing end openings with sidewalls therebetween which define a container interior. The container is placed over a portion of the head section so that the pin extends within the interior of the container. A spring spacer is then installed within the interior of the container about at least a portion of the circumference of the bearing pin at at least one axial location. The container is then packed with a particulate treating medium, the container is covered, and the pin and container are placed into a furnace for a time and at a temperature sufficient to activate the treating medium.

REFERENCES:
patent: 539089 (1895-05-01), Simonds
patent: 1561482 (1925-11-01), Phillips
patent: 2048526 (1936-07-01), Van der Pyl
patent: 2210622 (1940-08-01), Kell
patent: 4188242 (1980-02-01), Scales

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