Brazed Diamond Tools and Methods for Making the Same

Abstract

Superabrasive tools and methods for the making thereof are disclosed and described. In one aspect, superabrasive particles are chemically bonded to a matrix support material according to a predetermined pattern by a braze alloy. The brazing alloy may be provided as a powder, thin sheet, or sheet of amorphous alloy. A template having a plurality of apertures arranged in a predetermined pattern may be used to place the superabrasive particles on a given substrate or matrix support material.

1 . A method of making a superabrasive tool, comprising the steps of:
 a) providing a substrate; and   b) brazing a plurality of superabrasive particles directly to an exposed surface of the substrate in accordance with a predetermined pattern with a brazing alloy.   
     
     
         2 . The method of  claim 1 , wherein the brazing is accomplished using a brazing alloy that includes a material selected from the group consisting of titanium, vanadium, chromium, zirconium, molybdenum, tungsten, manganese, iron, silicon, aluminum and mixtures or alloys thereof. 
     
     
         3 . The method of  claim 2 , wherein the brazing alloy includes between about 2% and about 50% by weight of a material selected from the group consisting of chromium, manganese, titanium, silicon and aluminum. 
     
     
         4 . The method of  claim 3 , wherein the material is chromium. 
     
     
         5 . The method of  claim 1 , wherein the step of brazing includes heating the brazing alloy and substrate to a temperature of less than about 1,100° C. which is sufficient to braze the superabrasive particles directly to the substrate. 
     
     
         6 . The method of  claim 1 , wherein the braze alloy is a sheet of amorphous braze alloy. 
     
     
         7 . The method of  claim 1 , wherein prior to the step of brazing, the method further comprises the steps of:
 a) affixing the superabrasive particles in a predetermined pattern on an exposed surface of the substrate; and   b) applying the braze alloy to the substrate and the superabrasive particles.   
     
     
         8 . The method of  claim 1 , wherein prior to the step of brazing, the method further comprises the steps of:
 a) affixing the superabrasive particles in a predetermined pattern on a transfer sheet of amorphous braze alloy; and   b) applying the transfer sheet to the substrate.   
     
     
         9 . The method of  claim 1 , wherein the superabrasive particles are placed in a predetermined pattern. 
     
     
         10 . The method of  claim 9 , wherein the predetermined pattern is a uniform grid. 
     
     
         11 . A superabrasive tool comprising:
 a) a solid metal substrate;   b) a plurality of superabrasive particles; and   c) a layer of amorphous braze alloy chemically bonding the plurality of superabrasive particles to the solid metal substrate.   
     
     
         12 . The superabrasive tool of  claim 11 , wherein the brazing alloy includes a material selected from the group consisting of titanium, vanadium, chromium, zirconium, molybdenum, tungsten, manganese, iron, silicon and aluminum. 
     
     
         13 . The superabrasive tool of  claim 11 , wherein the brazing alloy includes between about 2% and 50% by weight of a material selected from the group consisting of chromium, manganese, titanium, silicon and aluminum. 
     
     
         14 . The superabrasive tool of  claim 11 , wherein bonding of the superabrasive particles avoids damage to the superabrasive particles. 
     
     
         15 . The superabrasive tool of  claim 11 , wherein superabrasive particles are oriented in a predetermined pattern. 
     
     
         16 . The superabrasive tool of  claim 15 , wherein the predetermined pattern consists of superabrasive particles positioned substantially along an exterior edge of the superabrasive tool. 
     
     
         17 . The superabrasive tool of  claim 15 , wherein the predetermined pattern comprises an exterior portion concentration of superabrasive particles that is higher than an interior portion concentration of superabrasive particles. 
     
     
         18 . The superabrasive tool of  claim 15 , wherein the predetermined pattern is a uniform grid. 
     
     
         19 . The super abrasive tool of  claim 11 , further comprising a layer of overlay material affixed to a working surface of the brazing alloy to create a smooth working surface. 
     
     
         20 . A superabrasive tool precursor comprising:
 a) a metal support matrix;   b) a plurality of superabrasive particles placed on the metal support matrix; and   c) a layer of amorphous braze alloy placed in contact with either the plurality of superabrasive particles or the metal support matrix.