EP0347399A1
Expired / Lapsed
EP
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A diffusion barrier coating material
Assignee: Sandvik AB
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Filing: 1989-06-07
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Granted: —
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Expires: 2009-06-07
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 Kutscher
- 👤 Jan Lindström
- 👤 Mats Sjöstrand
- 👤 Leif Akesson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 16:35
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: 11
Claim 1
Independent Claim
78 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 of MetCO, MetCON, MetON adjacent to the substrate and a second (next innermost) wear resistant coating of at least one layer of MetC, MetN and/or MetCN, where Met is Ti, Hf, V, Zr, Si, B or other metal of subgroup 3-7 of the periodic table of the elements, or a mixture thereof.
Claim 2
Dependent Claim
78 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 of MetCO, MetCON, MetON adjacent to the substrate and a second (next innermost) wear resistant coating of at least one layer of MetC, MetN and/or MetCN, where Met is Ti, Hf, V, Zr, Si, B or other metal of subgroup 3-7 of the periodic table of the elements, or a mixture thereof.
Claim 3
Dependent Claim
30 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, preferably y>0.2 and x+y+z<1.3 preferably 0.8<x+y+z<1.05.
Claim 4
Dependent Claim
25 words
Coated body according to claim 1 and 2 where the first coating adjacent to the substrate is a solid solution of MetC, MetO and/or MetN.
Claim 5
Dependent Claim
18 words
Coated body according to any of the preceding claims in which the body consists of cemented carbide .
Claim 6
Dependent Claim
35 words
Coated body according to any of the preceding claims in which the first coating is 0.05 - 5µm, preferably 0.1 - 2µm thick, and the second coating is > 0.2µm, preferably 0.5 - 20µm thick.
Claim 7
Dependent Claim
19 words
Coated body according to any of the preceding claims in which the first coating is thinner than the second.
Claim 8
Dependent Claim
17 words
Coated body according to any of the preceding claims in which the third coating consists of alumina.
Claim 9
Dependent Claim
17 words
Coated body according to any of the preceding claims in which the outermost coating consists of TiN.
Claim 10
Dependent Claim
19 words
Coated body according to any of the preceding claims in which the outer coating is a multiple layer coating.
Claim 11
Dependent Claim
20 words
Coated body according to any of the preceding claims in which the substrate has a binder phase enriched surface zone.
References Cited (Backward Citations)
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