ABRASIVE TOOL HAVING A BRAZE JOINT WITH INSOLUBLE PARTICLES
Multi-part abrasive tools are disclosed herein. In one embodiment, an abrasive tool includes a first body, a second body, and a braze layer that couples the first body to the second body. The braze layer includes a braze alloy having a liquidus temperature and insoluble particles at least partially surrounded by the braze alloy. The insoluble particles are insoluble with the braze alloy at temperatures at least 100° C. above the liquidus temperature of the braze alloy.
1 . An abrasive tool, comprising:
a first body;
a second body; and
a braze layer coupling the first body to the second body, the braze layer comprising:
a braze alloy having a liquidus temperature; and
insoluble particles at least partially surrounded by the braze alloy, wherein the insoluble particles are insoluble with the braze alloy at temperatures at least 100° C. above the liquidus temperature of the braze alloy.
2 . The abrasive tool of claim 1 , wherein the first body is a diamond body comprising polycrystalline diamond or composite diamond.
3 . The abrasive tool of any of claims 1 - 2 , wherein the second body is a hard metal carbide substrate.
4 . The abrasive tool of any of claims 1 - 3 , wherein the insoluble particles are selected from a group consisting of ceramics, diamond, cubic boron nitride, and refractory materials.
5 . The abrasive tool of any of claims 1 - 4 , wherein the insoluble particles maintain a yield strength of the braze layer at temperatures above about 250° C.
6 . The abrasive tool of any of claims 1 - 5 , wherein the braze alloy comprises an active metal braze alloy.
7 . The abrasive tool of claim 6 , wherein the active metal braze alloy comprises titanium.
8 . The abrasive tool of claim 7 , wherein the active metal braze alloy comprises from about 1 wt. % to about 5 wt. % titanium.
9 . The abrasive tool of claim 7 , wherein the active metal braze alloy comprises about 3 wt. % titanium.
10 . The abrasive tool of any of claims 1 - 9 , wherein the braze alloy comprises silver and copper.
11 . The abrasive tool of claim 10 , wherein the braze alloy further comprises indium.
12 . The abrasive tool of any of claim 1 - 9 , wherein the metal alloy comprises molybdenum.
13 . The abrasive tool of any of claims 3 - 12 , wherein the hard metal carbide substrate comprises cemented tungsten carbide.
14 . The abrasive tool of any of claims 1 - 13 , wherein the braze layer comprises less than about 20 vol. % insoluble particles, and preferably from about 8 vol. % to about 12 vol. % insoluble particles.
15 . The abrasive tool of any of claims 1 - 14 , wherein the insoluble particles exhibit a D 50 of less than about 10 μm, and preferably less than or equal to about 5 μm.
16 . The abrasive tool of any of claims 1 - 15 , wherein a ratio x of a D 50 of the insoluble particles to a thickness of a braze layer is in a range of about 0.08≦x≦0.20, and preferably in a range of about 0.10≦x≦0.15.
17 . The abrasive tool of any of claims 1 - 16 , wherein the insoluble particles are diamond particles, and the external surfaces of the diamond particles form a reaction product with the active metal braze alloy.
18 . The abrasive tool of any of claims 1 - 16 , wherein the liquidus temperature of the braze alloy is less than about 750° C., and preferably less than about 650° C.
19 . The abrasive tool of any of claims 1 - 16 , wherein the liquidus temperature of the braze alloy is in a range from about 800° C. to about 1050° C.
20 . The abrasive tool of any of claims 1 - 19 , wherein the braze layer having the braze alloy and the insoluble particles exhibits a higher critical temperature at which its strength decreases than a critical temperature of the braze alloy alone.