Cutting tool

Details Cutting tool Cutting tool

1989-09-08

1991-12-03

Dean, R.

Alloys or metallic compositions

Cobalt base

Chromium containing

420440, 428552, 501 87, 30350, G22F 300

Patent

active

050698729

ABSTRACT:
An improved cutting tool is provided, especially useful for hand shears. The cutting edge of the tool is made of a wear-resistant material of either: (a) 85% to 96% tungsten carbide and 15% to 4% cobalt, (b) 60% to 89% tungsten carbide, 4% to 28% tantalum carbide, 4% to 25% titanium carbide and 3% to 30% cobalt, or (c) 34% to 51% cobalt, 25% to 32% chromium, 14% to 21% tungsten, 2% to 4% carbon and one or more of the metals nickel, silicon, columbium, manganese and iron which, together, comprise no more than 16% of the material. For material "b", preferably the composition contains about 5% to 13% cobalt, 65% to 89% tungsten carbide, titanium carbide and tantalum carbide which, together, are present in an amount no greater than 30% of the composition of the material. For material "c", preferably the composition contains about 28% to 32% chromium, 43% to 48% cobalt, tungsten and one or more of nickel, silicon, iron, manganese, columbium and carbon which, together, are present in an amount no greater than 29% of the composition of the material.

REFERENCES:
patent: 2122403 (1938-07-01), Balke et al.
patent: 2191446 (1940-02-01), Balke et al.
patent: 2309371 (1943-01-01), Wissler
patent: 2801165 (1957-07-01), Baldwin et al.
patent: 3451791 (1969-06-01), Meadows
patent: 4868065 (1989-09-01), Maruyama et al.

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