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US 5,830,256 AGranted
Cemented carbide
OwnerIan Thomas Northrop, Christopher Thomas Petersinventors
Life of this patent
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Abstract
A coarse grained cemented carbide is produced by sintering a mixture of coarse grain carbide particles having an average particle size of at least 10 microns and a nickel binder in particulate form. The cemented carbide has particular use in the manufacture of a cutting element for a soft rock mining tool or road planing tool.
Claims4
A cemented carbide cutting element for a soft rock mining tool or a road planing tool which is resistant to stress corrosion in acidic water environments comprising:
- a cemented carbide produced by sintering a mixture of coarse grain carbide particles and a nickel binder in particulate form wherein the nickel binder has a particle size of less than 5 microns, and wherein the coarse grain carbide particles have a particle size of 10-50 microns which, in combination with the nickel binder having a particle size less than 5 micons endows the cutting element with the stress corrosion resistance in acidic water environments.
Dependencies are inferred from the claim text.