Method of making a cemented carbide tool and a cemented tool

Details Method of making a cemented carbide tool and a cemented tool Method of making a cemented carbide tool and a cemented tool

2006-12-19

2006-12-19

Jolley, Kirsten (Department: 1762)

Coating processes

Coating by vapor, gas, or smoke

Carbon or carbide coating

C427S249100, C427S376800, C051S307000, C051S309000, C148S527000

Reexamination Certificate

active

07150897

ABSTRACT:
According to the present invention there is now provided a cemented carbide body provided with at least one wear resistant layer, which body contains a toughness increasing surface zone. Increase in toughness is obtained due to the presence of a surface zone having increased WC grain size and/or increased Co content. The invention is most suitable for WC—Co cemented carbides. A method for making such bodies is also disclosed.

REFERENCES:
patent: 4830886 (1989-05-01), Cho et al.
patent: 4830930 (1989-05-01), Taniguchi et al.
patent: 6436204 (2002-08-01), Gates et al.
patent: 6447912 (2002-09-01), Mikus et al.
patent: 0 560 212 (1993-09-01), None
patent: 98/35071 (1998-08-01), None
patent: 99/31292 (1999-06-01), None
patent: 00/31314 (2000-06-01), None
Swedish Patent Office Action dated May 23, 2001.

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