Coated abrasives

Abstract

This Invention relates to coated abrasives, a process for their production, and to coated abrasives for use in abrasive-containing tools.

1 - 8 . (canceled) 
   
   
       9 . A tool component, comprising a metal bond matrix containing ferrous materials and a coated diamond abrasive that comprises a core of diamond abrasive material, an inner layer of a metal carbide, nitride, or boride chemically bonded to an outer surface of the diamond abrasive material and an outer layer of a metal carbonitride deposited on the inner layer. 
   
   
       10 . The tool component according to  claim 9 , wherein the outer layer is formed of titanium carbonitride. 
   
   
       11 . The tool component according to  claim 9 , wherein the outer layer is deposited by physical vapour deposition. 
   
   
       12 . The tool component according to  claim 9 , wherein the inner layer is formed from an element capable of forming, singly or in combination, carbides, nitrides or borides to the surface(s) of the diamond abrasive material using a hot coating process. 
   
   
       13 . The tool component according to  claim 12 , wherein the element is selected from the group comprising groups IVa, Va, VIa, IIIb and IVb of the periodic table. 
   
   
       14 . The tool component according to  claim 9 , wherein the inner layer is a titanium or chromium carbide coating. 
   
   
       15 . The tool component according to  claim 9 , wherein the matrix comprises a metal selected from the group consisting of cobalt, iron, and nickel. 
   
   
       16 . The tool component according to claim  8 , which is a component for an impregnated tool. 
   
   
       17 . The tool component according to  claim 16 , wherein the impregnated tool is a saw blade, a drill and a bead for a diamond wire.