Differentially hardfaced rock bit
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United States of America Patent
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-
Feb 23, 1988
Grant Date -
N/A
app pub date -
Jul 13, 1987
filing date -
Jul 13, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for manufacturing an earth boring drill bit and bit produced thereby are shown. The bit has rotatable cutters with a plurality of milled teeth, each of the teeth having opposing flanks. A first tube hardfacing is applied to a selected one of the opposing flanks, the hardfacing comprising a metallic binder with wear-resistant particles dispersed throughout the binder. The other of the opposing flanks has a second tube hardfacing applied thereto. The particle size of the wear-resistant particles differs between the first and second tube hardfacings so that the resulting difference in abrasion resistance of the tooth flanks produces a self-sharpening effect as the tooth wears.
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