US4496372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive bodies
Assignee: Individual
•
Filing: 1983-03-30
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Granted: 1985-01-29
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Expires: 2003-03-30
Abstract
Abstract There is provided a method of bonding an abrasive compact to a metal-containing support body, typically a body of cemented carbide, using solid state diffusion bonding techniques. The metal which is used for the diffusion bonding is nickel, copper, cobalt, iron or an alloy containing one or more of these metals.
Inventors
- 👤 Eric A. Almond
- 👤 Mark G. Gee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:26
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/007; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B22F7/00; B22F7/06; B23; B23K; B23K20/00; B23K20/16; B23K20/22; B23P; B23P15/00; B23P15/28; B23P15/30; B24D18/00; B24D3/02; B24D3/04; B24D3/06; C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C04B35/645; C04B37/00; C04B37/02; C04B37/023; C04B37/025; C04B37/026; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/08; C04B2237/12; C04B2237/123; C04B2237/124; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/345; C04B2237/348; C04B2237/36; C04B2237/361; C04B2237/363; C04B2237/368; C04B2237/40; C04B2237/401; C04B2237/405; C04B2237/50; C04B2237/52; C04B2237/64; C04B2237/70; C04B2237/708; C04B2237/72; C04B2237/76; C04B2237/78
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
133 words
A method of bonding an abrasive compact to a metal-containing support body including the steps of: (a) bonding a layer of nickel, copper, cobalt, iron or an alloy containing one or more of these metals to a surface of the support body; (b) bringing the compact and support body together so that the metal layer contacts a surface of the compact; (c) urging the compact and support body together by applying a transverse pressure thereto; (d) raising the temperature of the metal layer to a temperature below its melting point and in the range of 650° C. to 950° C.; and (e) maintaining the pressure and temperature for a time sufficient to cause diffusion bonding between the compact and the support body, steps (d) and (e) being carried out in an inert atmosphere.
Claim 2
Independent Claim
133 words
A method of bonding an abrasive compact to a metal-containing support body including the steps of: (a) bonding a layer of nickel, copper, cobalt, iron or an alloy containing one or more of these metals to a surface of the support body; (b) bringing the compact and support body together so that the metal layer contacts a surface of the compact; (c) urging the compact and support body together by applying a transverse pressure thereto; (d) raising the temperature of the metal layer to a temperature below its melting point and in the range of 650° C. to 950° C.; and (e) maintaining the pressure and temperature for a time sufficient to cause diffusion bonding between the compact and the support body, steps (d) and (e) being carried out in an inert atmosphere.
Claim 3
Dependent Claim
26 words
A method of claim 1 wherein the transverse pressure applied to the compact and support body is in the range 40 to 300 N/mm 2 .
Claim 4
Dependent Claim
20 words
A method of claim 1 wherein the pressure and temperature are maintained for a period of 5 to 360 minutes.
Claim 5
Dependent Claim
20 words
A method of claim 3 wherein the pressure and temperature are maintained for a period of 5 to 35 minutes.
Claim 6
Dependent Claim
59 words
A method of claim 1 wherein the transverse pressure applied to the compact and support body is in the range 40 to 300 N/mm 2 ; the temperature to which the metal layer is raised is in the range 650° to 950° C. and the temperature and pressure conditions were maintained for a period of 5 to 360 minutes.
Claim 7
Dependent Claim
95 words
A method according to claim 1 wherein the compact and support body after having been brought together in step (b) are placed in the cavity of an assembly comprising a surround body having a cavity formed therein and an expansion body located in the cavity and having a coefficient of thermal expansion greater than that of the surround body, and the temperature of the assembly raised to the desired temperature of step (d) thereby causing the expansion body to expand and apply the desired transverse pressure of step (c) to the compact and support body.
Claim 8
Dependent Claim
20 words
A method according to claim 6 wherein the temperature of the assembly is raised by placing it in a furnace.
Claim 9
Dependent Claim
24 words
A method according to claim 6 wherein the surround body is made of cemented carbide or a ceramic based on silicon nitride or zirconia.
Claim 10
Dependent Claim
14 words
A method according to claim 6 wherein the expansion body is made of Nimonic.
Claim 11
Dependent Claim
30 words
A method according to claim 1 wherein the surface of the metal layer which is brought into contact with the surface of the compact is polished prior to step (b).
Claim 12
Dependent Claim
66 words
A method according to claim 1 wherein the metal layer is bonded to the surface of the support body by depositing the layer on the surface, applying a transverse pressure to the layer, raising the temperature of the layer to a temperature below its melting point and maintaining the pressure and temperature for a period sufficient to enable the layer to bond to the support body.
Claim 13
Dependent Claim
23 words
A method of claim 11 wherein the pressure applied to the metal layer is in the range 1 to 200 N/mm 2 .
Claim 14
Dependent Claim
25 words
A method of claim 11 wherein the pressure and temperature applied to the metal layer are maintained for a period of 5 to 300 minutes.
Claim 15
Dependent Claim
25 words
A method of claim 11 wherein the pressure and temperature applied to the metal layer are maintained for a period of 5 to 30 minutes.
Claim 16
Dependent Claim
39 words
A method of claim 11 wherein the pressure applied to the metal layer is in the range 1 to 200 N/mm 2 ; and the temperature and pressure conditions are maintained for a period of 5 to 300 minutes.
Claim 17
Dependent Claim
14 words
A method according to claim 1 wherein the support body is a tool shank.
Claim 18
Dependent Claim
20 words
A method according to claim 1 wherein the abrasive compact bonded to the support body is a composite abrasive compact.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |