Drill bushing and similar article

Details Drill bushing and similar article Drill bushing and similar article

1975-08-08

1978-05-02

Bertsch, Richard A.

Cutlery

308241, 308DIG8, F16C 3304

Patent

active

040871371

ABSTRACT:
A drill bushing or similar article, such as a pump bushing having a hardened body of steel and a thin inner coating of tungsten carbide distributed throughout a matrix of nickel chrome which provides a metallurgical bond to the steel body and a metallic bond to the particles of tungsten carbide. The drill bushing or similar article will have the wear characteristic of the solid tungsten carbide article, but would retain the coefficient of expansion characterisic of steel with the steel body eliminating the brittleness experienced in solid tungsten carbide articles.

REFERENCES:
patent: 3206264 (1965-09-01), Dalzell et al.
patent: 3915514 (1975-10-01), Hudson
patent: 3972576 (1976-08-01), Hill

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