Method of forming an uninterrupted refractory coating on a downh

Details Method of forming an uninterrupted refractory coating on a downh Method of forming an uninterrupted refractory coating on a downh

1992-05-04

1994-09-20

Beck, Shrive

Coating processes

Spraying

Heated coating material

427450, 427451, 175374, 175375, 175426, C23C 400

Patent

active

053487702

ABSTRACT:
Drill bits having projecting inserts are completely coated with refractory material including on the edge margins about the inserts by thermally spraying with refractory particles whose particulate constituent under the spraying conditions is able to penetrate the inserts. Completely coated drill bits are provided.

REFERENCES:
patent: 4372404 (1983-02-01), Drake
patent: 4396077 (1983-08-01), Radtke
patent: 4592252 (1986-06-01), Ecer
patent: 4593776 (1986-06-01), Salesky
patent: 4597456 (1986-07-01), Ecer
patent: 5019686 (1991-05-01), Marantz
patent: 5206059 (1993-04-01), Marantz

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