Cemented carbide and cutting tool

Details Cemented carbide and cutting tool Cemented carbide and cutting tool

2011-07-05

2011-07-05

King, Roy (Department: 1733)

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

C075S236000, C075S242000, C428S698000

Reexamination Certificate

active

07972409

ABSTRACT:
Disclosed is a cemented carbide comprising 5 to 10 mass % of cobalt and/or nickel, and 0 to 10 mass % of at least one selected from a carbide (except for tungsten carbide), a nitride and a carbonitride of at least one selected from the group consisting of metals of groups 4, 5 and 6 of the Periodic Table, the balanced amount of tungsten carbide, a hard phase comprising mainly tungsten carbide particles, and containing β particles of at least one selected from the carbide, the nitride and the carbonitride, and the hard phase being bonded through a binder phase comprising mainly cobalt and/or nickel, wherein a mean particle size of the tungsten carbide particles is 1 μm or less, and the cemented carbide having a sea-island structure in which plural binder-phase-aggregated portions composed mainly of cobalt and/or nickel are scattered in the proportion of 10 to 70 area % based on the total area on the surface of the cemented carbide. The cemented carbide is excellent in wear resistance and fracture resistance.

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Chinese language office action and its English language translation for corresponding Chinese application 200680009887.4.
German language office action and its English language translation for corresponding German application 112006000769.6-45.
Japanese language office action dated Sep. 14, 2010 and its English language translation for corresponding Japanese application 2007510428 lists the reference above.

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