US5135801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusion barrier coating material
Assignee: Sandvik AB
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Filing: 1988-06-13
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Granted: 1992-08-04
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Expires: 2008-06-13
Abstract
Abstract A coated body consisting of a substrate that can be decarburized during a carbide, nitride or carbonitride coating process comprising a first (innermost) carbon diffusion retarding coating of MetCO, MetCON, MetON adjacent to the substrate and a second (next innermost) wear resistant coating of MetC, MetN and/or MetCN, where Met is Ti, Hf, V, Zr, Si, B or other metals of subgroup 3-7 of the periodic table of the elements, or a mixture thereof. The intermediate coating has been found beneficial in order to reduce or even eliminate the formation of eta phase in the substrate.
Inventors
- 👤 Asa K. Nystrom
- 👤 Jan N. Lindstrom
- 👤 Mats E. C. Sjostrand
- 👤 Leif E. A. Akesson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:15
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/24; C23C28/00; C23C28/04; C23C28/044; C23C16/00; C23C16/22; C23C16/30; C23C16/308; C23C16/32; C23C16/34; C23C16/36; C23C30/00; C23C30/005; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/30
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
86 words
Coated body consisting of a substrate that can be decarburized during a carbide, nitride or carbonitride coating process comprising a first (innermost) carbon diffusion barrier coating selected from the group consisting of MetCO, MetCON and MetON atop and adjacent to the substrate and a second (next innermost) wear resistant coating of at least one layer of MetC, MetN or MetCN, where Met is Ti, Hf, V, Zr, Si, B or other metals of subgroup 3-7 of the periodic table of the elements, or a mixture thereof.
Claim 2
Dependent Claim
86 words
Coated body consisting of a substrate that can be decarburized during a carbide, nitride or carbonitride coating process comprising a first (innermost) carbon diffusion barrier coating selected from the group consisting of MetCO, MetCON and MetON atop and adjacent to the substrate and a second (next innermost) wear resistant coating of at least one layer of MetC, MetN or MetCN, where Met is Ti, Hf, V, Zr, Si, B or other metals of subgroup 3-7 of the periodic table of the elements, or a mixture thereof.
Claim 3
Dependent Claim
26 words
Coated body according to claim 1 where the first coating adjacent to the substrate consists of MetC x O y N z where y>0.1 and x+y+z<1.3.
Claim 4
Dependent Claim
23 words
Coated body according to claim 1 where the first coating adjacent to the substrate is a solid solution of MetC, MetO and MetN.
Claim 5
Dependent Claim
14 words
Coated body according to claim 1 in which the body consists of cemented carbide.
Claim 6
Dependent Claim
23 words
Coated body according to claim 1 in which the first coating is 0.05-5 μm thick, and the second coating is >0.2 μm thick.
Claim 7
Dependent Claim
16 words
Coated body according to claim 1 in which the first coating is thinner than the second.
Claim 8
Dependent Claim
17 words
Coated body according to claim 1 in which the said body has a third coating of alumina.
Claim 9
Dependent Claim
17 words
Coated body according to claim 1 in which the said body has an outermost coating of TiN.
Claim 10
Dependent Claim
19 words
Coated body according to claim 1 in which the said body has an outer coating which contains multiple layers.
Claim 11
Dependent Claim
17 words
Coated body according to claim 1 in which the substrate has a binder phase enriched surface zone.
Claim 12
Dependent Claim
26 words
Coated body according to claim 2 wherein the first coating adjacent to the substrate consists of MetC x O y N z where y>0.2 and 0.8<x+y+z<1.05.
Claim 13
Dependent Claim
23 words
Coated body according to claim 5 in which the first coating is 0.1-2 μm thick and the second coating is 0.5-20 μm thick.
Claim 14
Dependent Claim
10 words
Coated body according to claim 3 wherein Met is Ti.
Claim 15
Dependent Claim
85 words
Coated body of a cemented carbide substrate that can be decarburized during a carbide, nitride or carbonitride coating process comprising a first (innermost) carbon diffusion barrier coating selected from the group consisting of MetCO, MetCON, and MetON adjacent to the substrate and a second (next innermost) wear resistant coating of at least one layer of MetC, MetN or MetCN, where Met is Ti, Hf, V, Zr, Si, B or other metals of subgroup 3-7 of the periodic table of the elements, or a mixture thereof.
Claim 16
Dependent Claim
85 words
Coated body of a cemented carbide substrate that can be decarburized during a carbide, nitride or carbonitride coating process comprising a first (innermost) carbon diffusion barrier coating selected from the group consisting of MetCO, MetCON, and MetON adjacent to the substrate and a second (next innermost) wear resistant coating of at least one layer of MetC, MetN or MetCN, where Met is Ti, Hf, V, Zr, Si, B or other metals of subgroup 3-7 of the periodic table of the elements, or a mixture thereof.
Claim 17
Dependent Claim
25 words
Coated body according to claim 14 wherein the first coating adjacent to the substrate comprises MetC x O y N z where y>0.1 and x+y+z<1.3.
Claim 18
Dependent Claim
10 words
Coated body according to claim 14 wherein Met is Ti.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |