Cemented carbide insert

Details Cemented carbide insert Cemented carbide insert

2006-07-10

2009-11-10

Chen, Bret (Department: 1792)

Coating processes

Coating by vapor, gas, or smoke

Carbon or carbide coating

C427S255391, C427S376100

Reissue Patent

active

RE040962

ABSTRACT:
Methods of making a coated cemented carbide body include: forming a powder mixture having WC, 5-12 wt % Co, 3-11% cubic carbides of Ta and Ti with a ratio of Ta/Ti is 1.0-4.0; adding N in an amount of 0.6-2.0% of the weight of Ta and Ti; milling and spray-drying the mixture to form a powder; compacting and sintering the powder at a temperature of 1300-1500° C., in a controlled atmosphere of about 50 mbar followed by cooling, whereby a body having a binder phase enriched and essentially gamma-phase free surface zone of 5-50 μm in thickness is obtained; applying a pre-coating treatment to the body; and appling a hard, wear-resistant coating to the body.

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