Fabrication of brazable in air diamond tool inserts and inserts

Details Fabrication of brazable in air diamond tool inserts and inserts Fabrication of brazable in air diamond tool inserts and inserts

1996-01-05

1997-07-15

Jones, Deborah

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51307, 51309, 407119, B24D 1102

Patent

active

056478780

ABSTRACT:
A diamond article, for example, a sheet-form diamond tool insert brazable in air. The diamond sheet has a dual layer coating, a WTi bonding layer and a protective braze compatible overcoat, such as a Ag overcoat. The interface between the WTi layer and the diamond substrate includes sufficient metal carbide component to provide adhesion. Once coated with the WTi layer and the protective overcoat, the dual-coated diamond insert may be air brazed to a tool substrate in a manufacturing environment using a standard braze without a vacuum furnace or special atmosphere. A method for manufacturing the diamond insert is also disclosed. The diamond insert is coated and heat treated in an oxygen- and nitrogen-free atmosphere to create metal carbide at the diamond-coating interface.

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