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US 6,102,789 AGranted
Abrasive tools
AssigneeNorton Company
InventorsSrinivasan Ramanath, Shih Yee Kuo, William H. Williston, Sergej-Tomislav Buljan
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Abstract
Abrasive tools suitable for precision grinding of hard brittle materials, such as ceramics and composites comprising ceramics, at peripheral wheel speeds up to 160 meters/second are provided. The abrasive tools comprise a wheel core attached to an abrasive rim of dense, metal bonded superabrasive segments by means of a thermally stable bond.
Claims12
An abrasive tool comprising a core, having a minimum specific strength of 2.4 MPa-cm.sup.3 /g, a core density of 0.5 to 8.0 g/cm3 and a circular perimeter;
- an abrasive rim defined by at least one abrasive segment;
- and a thermally stable bond between the core and the rim;
- wherein the abrasive segment consists essentially of 45 to 90 volume % metal bond matrix and 10 to 50 volume % abrasive grain sintered together at a temperature of 370-550.degree. C., and has a fracture toughness of 1.0 to 6.0 MPa M.sup.1/2 ;
- and wherein the abrasive tool is adapted for precision grinding of brittle materials at speeds up to 160 m/s.
1 more element
Dependencies are inferred from the claim text.