US4604106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite polycrystalline diamond compact
Assignee: Smith International Inc
•
Filing: 1985-04-29
•
Granted: 1986-08-05
•
Expires: 2005-04-29
Abstract
Abstract The invention is a composite polycrystalline diamond compact comprising at least one layer of diamond crystals and precemented carbide pieces which have been pressed under sufficient heat and pressure to create composite polycrystalline material wherein polycrystalline diamond and the precemented carbide pieces are interspersed in one another. Preferably, this composite material layer is disposed as a transition layer between the layer including the working surface of the compact and the substrate for the compact. In addition, the layer including the working surface may also be comprised of the composite material, with the general requirement that the volume percent of the polycrystalline diamond component in the layer including the working surface be higher than in the transition layer. Alternatively, the compact, rather than being divided into discrete layers, instead comprises a single layer of this composite material wherein the concentration of the polycrystalline diamond component is at its highest at the working surface of the compact and then decreases in the direction away from the working surface.
Inventors
- 👤 David R. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:32
CPC Classifications
C; C22; C22C; C22C26/00; B; B01; B01J; B01J3/00; B01J3/06; B01J3/062; B22; B22F; B22F7/00; B22F7/06; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/06; B28; B28D; B28D1/00; B28D1/02; B28D1/12; B28D1/121; E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B4/00; E21B4/003; F; F16; F16C; F16C17/00; F16C17/04; F16C17/10; F16C33/00; F16C33/02; F16C33/04; F16C33/043; F16C33/26; B01J2203/00; B01J2203/06; B01J2203/0605; B01J2203/062; B01J2203/065; B01J2203/0655; B01J2203/0675; B01J2203/0685; B22F2998/00; F16C2206/00; F16C2206/02; F16C2352/00
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
126 words
A composite polycrystalline body for engaging a work material comprising: a first layer with at least one exposed surface adapted for contacting the work material, said first layer comprising diamond crystals pressed under sufficient heat and pressure to create polycrystalline diamond material in which adjacent diamond crystals are bonded together; and a second layer which is joined at an interface with the first layer and comprising a mixture of diamond crystals and precemented carbide pieces pressed under sufficient heat and pressure to create composite polycrystalline material in which adjacent diamond crystals are bonded together to create polycrystalline diamond material which is bonded to the precemented carbide pieces, and in which second layer the polycrystalline diamond material and the precemented carbide pieces are interspersed in one another.
Claim 2
Dependent Claim
126 words
A composite polycrystalline body for engaging a work material comprising: a first layer with at least one exposed surface adapted for contacting the work material, said first layer comprising diamond crystals pressed under sufficient heat and pressure to create polycrystalline diamond material in which adjacent diamond crystals are bonded together; and a second layer which is joined at an interface with the first layer and comprising a mixture of diamond crystals and precemented carbide pieces pressed under sufficient heat and pressure to create composite polycrystalline material in which adjacent diamond crystals are bonded together to create polycrystalline diamond material which is bonded to the precemented carbide pieces, and in which second layer the polycrystalline diamond material and the precemented carbide pieces are interspersed in one another.
Claim 3
Dependent Claim
17 words
The composite polycrystalline body of claim 1 further comprising a substrate for supporting the composite polycrystalline body.
Claim 4
Dependent Claim
15 words
The composite polycrystalline body of claim 2 wherein the substrate is comprised of cemented carbide.
Claim 5
Dependent Claim
14 words
The composite polycrystalline body of claim 2 wherein the substrate is comprised of steel.
Claim 6
Dependent Claim
25 words
The composite polycrystalline body of claim 1 wherein the total volume percent of polycrystalline diamond material in the second layer is between 20 and 80.
Claim 7
Dependent Claim
25 words
The composite polycrystalline body of claim 1 wherein the total volume percent of polycrystalline diamond material in the second layer is between 35 and 45.
Claim 8
Dependent Claim
33 words
The composite polycrystalline body of claim 1 wherein the volume percent of polycrystalline diamond material varies in the second layer and generally decreases along a gradient in the direction away from the interface.
Claim 9
Dependent Claim
193 words
A composite polycrystalline body for engaging a work material comprising: a first layer with at least one exposed surface adapted for contacting the work material, said first layer comprising a first mixture of diamond crystals and precemented carbide pieces pressed under sufficient heat and pressure to create composite polycrystalline material in which adjacent diamond crystals are bonded together to create polycrystalline diamond material which is bonded to the precemented carbide pieces, and in which first layer the polycrystalline diamond material and the precemented carbide pieces are interspersed in one another; and a second layer which is joined at an interface with the first layer, and comprising a second mixture of diamond crystals and precemented carbide pieces pressed under sufficient heat and pressure to create composite polycrystalline material in which adjacent diamond crystals are bonded together to create polycrystalline diamond material which is bonded to the precemented carbide pieces, and in which second layer the polycrystalline diamond material and the precemented carbide pieces are interspersed in one another; said first layer having a volume percent of polycrystalline diamond material which is higher than the volume percent of polycrystalline diamond material in said second layer.
Claim 10
Dependent Claim
193 words
A composite polycrystalline body for engaging a work material comprising: a first layer with at least one exposed surface adapted for contacting the work material, said first layer comprising a first mixture of diamond crystals and precemented carbide pieces pressed under sufficient heat and pressure to create composite polycrystalline material in which adjacent diamond crystals are bonded together to create polycrystalline diamond material which is bonded to the precemented carbide pieces, and in which first layer the polycrystalline diamond material and the precemented carbide pieces are interspersed in one another; and a second layer which is joined at an interface with the first layer, and comprising a second mixture of diamond crystals and precemented carbide pieces pressed under sufficient heat and pressure to create composite polycrystalline material in which adjacent diamond crystals are bonded together to create polycrystalline diamond material which is bonded to the precemented carbide pieces, and in which second layer the polycrystalline diamond material and the precemented carbide pieces are interspersed in one another; said first layer having a volume percent of polycrystalline diamond material which is higher than the volume percent of polycrystalline diamond material in said second layer.
Claim 11
Dependent Claim
17 words
The composite polycrystalline body of claim 8 further comprising a substrate for supporting the composite polycrystalline body.
Claim 12
Dependent Claim
15 words
The composite polycrystalline body of claim 9 wherein the substrate is comprised of cemented carbide.
Claim 13
Dependent Claim
14 words
The composite polycrystalline body of claim 9 wherein the substrate is comprised of steel.
Claim 14
Dependent Claim
25 words
The composite polycrystalline body of claim 8 wherein the total volume percent of polycrystalline diamond material in the first layer is between 70 and 98.
Claim 15
Dependent Claim
25 words
The composite polycrystalline body of claim 8 wherein the total volume percent of polycrystalline diamond material in the second layer is between 2 and 70.
Claim 16
Dependent Claim
22 words
The composite polycrystalline body of claim 8 wherein the volume percent of polycrystalline diamond material is relatively uniform throughout the first layer.
Claim 17
Dependent Claim
22 words
The composite polycrystalline body of claim 8 wherein the volume percent of polycrystalline diamond material is relatively uniform throughout the second layer.
Claim 18
Dependent Claim
38 words
The composite polycrystalline body of claim 8 wherein the volume percent of polycrystalline diamond material varies in the first layer and generally decreases along a gradient in a direction away from the exposed surface and toward the interface.
Claim 19
Dependent Claim
29 words
The composite polycrystalline body of claim 16 wherein the volume percent of polycrystalline diamond material varies in the second layer and generally increases in a direction toward the interface.
Claim 20
Dependent Claim
109 words
A composite polycrystalline body for engaging a work material comprising a mixture of diamond crystals and precemented carbide pieces pressed under sufficient heat and pressure to create a composite polycrystalline body with an exposed surface adapted for contacting the work material, and in which adjacent diamond crystals are bonded together to create polycrystalline diamond material which is bonded to the precemented carbide pieces, and in which body the diamond crystals and the precemented carbide pieces are interspersed in one another; and in which the volume percent of polycrystalline diamond material varies in the composite body, and generally decreases along a gradient in the direction away from the exposed surface.
Claim 21
Dependent Claim
109 words
A composite polycrystalline body for engaging a work material comprising a mixture of diamond crystals and precemented carbide pieces pressed under sufficient heat and pressure to create a composite polycrystalline body with an exposed surface adapted for contacting the work material, and in which adjacent diamond crystals are bonded together to create polycrystalline diamond material which is bonded to the precemented carbide pieces, and in which body the diamond crystals and the precemented carbide pieces are interspersed in one another; and in which the volume percent of polycrystalline diamond material varies in the composite body, and generally decreases along a gradient in the direction away from the exposed surface.
Claim 22
Dependent Claim
17 words
The composite polycrystalline body of claim 18 further comprising a substrate for supporting the composite polycrystalline body.
Claim 23
Dependent Claim
15 words
The composite polycrystalline body of claim 19 wherein the substrate is comprised of cemented carbide.
Claim 24
Dependent Claim
14 words
The composite polycrystalline body of claim 19 wherein the substrate is comprised of steel.
Claim 25
Dependent Claim
21 words
The composite polycrystalline body of claim 18 wherein the total volume percent of polycrystalline diamond material is between 20 and 80.
Claim 26
Dependent Claim
21 words
The composite polycrystalline body of claim 18 wherein the total volume percent of polycrystalline diamond material is between 40 and 50.
Claim 27
Dependent Claim
24 words
The composite polycrystalline body of claim 18 wherein the volume percent of polycrystalline diamond material at the exposed surface is between 90 and 100.
References Cited (Backward Citations)
US3745623A
Cited
US4215999A
Cited
US4229186A
Cited
US4303442A
Cited
US4255165A
Cited
US4252102A
Cited
US4411672A
Cited
US4370149A
Cited
US4525178A
Cited
US4525178B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |