Simultaneous carburizing and boronizing of earth boring drill bi

Details Simultaneous carburizing and boronizing of earth boring drill bi Simultaneous carburizing and boronizing of earth boring drill bi

1985-06-11

1987-04-07

Lusignan, Michael R.

Metal treatment

Compositions

Heat treating

148 155, 148 165, C21D 148, C21D 156, C21D 922, C23C 900

Patent

active

046558519

ABSTRACT:
Disclosed herein are treatments for the manufacture of earth boring drill bits having abrasive wear resistant seal surfaces. The external surface of the bearing pin is surface treated, as by carburizing, in one region and simultaneously boronized over the remaining friction bearing region in a one step operation.

REFERENCES:
patent: 3155548 (1964-11-01), Ashikari et al.
patent: 4188242 (1980-02-01), Scales
patent: 4495006 (1985-01-01), Aves et al.

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