Composite diamond abrasive compact

US5498480A · kind A · utility

Inventors

• Klaus Tank · Germiston, ZA
• Peter N. Tomlinson · Kimberley, ZA
• Trevor J. Martell · Kimberley, ZA
• Andrew I. Lloyd · Kimberley, ZA
• Bruce Ringsby Olmstead · Johannesburg, ZA

Key dates

• Filing date: May 5, 1994
• Grant date: Mar 12, 1996
• Expiry date: May 5, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/30
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A composite diamond abrasive compact comprises a diamond compact bonded to a cemented carbide support along a compact/carbide interface and is characterised by the carbide support comprising at least two zones, a first zone containing a binder metal content of a predetermined amount, and a second zone extending from the interface to the first zone and having a binder metal content which is substantially lower than that of the first zone. The second zone has a depth or thickness of no more than 0,75 mm. The binder metal content of the second zone increases from the interface to the first zone in a continuous, non-interrupted manner.