Attack Tool
In one aspect of the invention, an attack tool is disclosed which has a wear-resistant base suitable for attachment to a driving mechanism, a first cemented metal carbide segment brazed to the base at a first interface, and a second metal carbide segment brazed to the first carbide segment at a second interface opposite the base.
1 . An attack tool, comprising:
a first cemented metal carbide segment brazed to a second cemented metal carbide segment at an interface;
wherein diamond with a substantially conical shape is bonded to the second cemented metal carbide segment and is 0.020 to 0.100 inches away from the interface.
2 . The tool of claim 1 , wherein the first segment is attached to a wear resistant base at an interface with a shank suitable for attachment to a driving mechanism.
3 . The tool of claim 2 , wherein the first segment is substantially coaxial with the shank.
4 . The tool of claim 2 , wherein the shank is secured within a holder that is adapted to allow the shank to rotate during operation.
5 . The tool of claim 2 , wherein the shank is secured within a hold that is adapted to restrain the shank from rotating during operation.
6 . The tool of claim 1 , wherein the tool is an asphalt pick.
7 . The tool of claim 1 , wherein the tool is a mining pick.
8 . The tool of claim 1 , wherein the tool is an indenter.
9 . The tool of claim 1 , wherein the tool is a shear cutter.
10 . The tool of claim 1 , wherein the first cemented metal carbide segment comprises a volume of 0.250 cubic inches to 0.600 cubic inches.
11 . The tool of claim 1 , wherein the second cemented metal carbide segment comprises a region bonded to the diamond selected from the group consisting of layered diamond, infiltrated diamond, natural diamond, polycrystalline diamond, diamond impregnated carbide, diamond impregnated matrix, silicon bonded diamond, or combinations thereof.
12 . The tool of claim 1 , wherein the first and/or second metal carbide segments comprise tungsten, titanium, tantalum, molybdenum, niobium, or combinations thereof.
13 . The tool of claim 1 , wherein the first cemented metal carbide segment comprises an upper diameter and the second cemented metal carbide segment comprises a lower diameter, wherein the upper and lower diameters are substantially equal.
14 . The tool of claim 1 , wherein the first segment increases in diameter from the braze to the interface.