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US 5,738,698 AGranted
Brazing of diamond film to tungsten carbide
AssigneeSaint-Gobain/Norton Industrial Ceramics Corporation
InventorsRakesh R. Kapoor, Bela G. Nagy, Louis K. Bigelow
Life of this patent
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Abstract
The reliability of a braze joint formed between a diamond film and a tungsten carbide body is increased by use of a vanadium-containing braze. The braze joint exhibits an average shear strength greater than about 40,000 pounds per square inch, (276 MPa) and the braze exhibits a contact angle with the diamond film of less than about 15.degree..
Claims2
A cutting tool, comprising:
- a polycrystalline diamond film cutter element joined to a cemented tungsten carbide substrate by means of a first braze to form an assembly piece, the first braze comprising between 0.5 and 10 weight percent vanadium and contains at least one metal selected form the group consisting of gold and nickel, and
- a larger workpiece joined to said assembly piece by means of a second braze, the second braze having a lower melting temperature than the first braze.
Dependencies are inferred from the claim text.