Simultaneous carburizing and boronizing of earth boring...

Details Simultaneous carburizing and boronizing of earth boring... Simultaneous carburizing and boronizing of earth boring...

C - Chemistry, Metallurgy

21

D

148/37

C21D 9/22 (2006.01) C21D 1/06 (2006.01) C21D 1/78 (2006.01) C23C 8/72 (2006.01) E21B 10/22 (2006.01)

Patent

CA 1265729

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.

503211

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