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US4728579A
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Wear resistant, coated, metal carbide body and a method for its production
Assignee: Fried Krupp AG Hoesch Krupp
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Filing: 1986-03-04
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Granted: 1988-03-01
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Expires: 2006-03-04
Abstract
Abstract A wear resistant, coated, metal carbide body comprising a metal carbide basic body, a metallic intermediate layer and at least one metal-free hard substance layer; wherein the metallic intermediate layer comprises molybdenum and/or tungsten, has a thickness of 0.1 to 2 μm and is applied to the metal carbide basic body by means of a physical vapor deposition process, preferably by direct cathode sputtering. During the application of the intermediate layer, the metal carbide basic body has a temperature from 200° to 600° C.
Inventors
- 👤 Udo Konig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:16
CPC Classifications
C; C23; C23C; C23C28/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12771; Y10T428/12806
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
99 words
A wear resistant, coated, metal carbide body comprising a metal carbide basic body, a metallic intermediate layer and at least one metal-free hard substance layer, wherein the metallic intermediate layer comprises at least one metal selected from the group consisting of molybdenum and tungsten and has a thickness of from about 0.1 to 2 μm, said metallic intermediate layer having been applied to the metal carbide basic body by a physical vapor deposition process in which the metal carbide basic body is maintained at a temperature of from 200° to 600° C. during the deposition of the intermediate layer.
Claim 2
Dependent Claim
99 words
A wear resistant, coated, metal carbide body comprising a metal carbide basic body, a metallic intermediate layer and at least one metal-free hard substance layer, wherein the metallic intermediate layer comprises at least one metal selected from the group consisting of molybdenum and tungsten and has a thickness of from about 0.1 to 2 μm, said metallic intermediate layer having been applied to the metal carbide basic body by a physical vapor deposition process in which the metal carbide basic body is maintained at a temperature of from 200° to 600° C. during the deposition of the intermediate layer.
Claim 3
Dependent Claim
13 words
The metal carbide body of claim 1, wherein the intermediate layer comprises molybdenum.
Claim 4
Dependent Claim
13 words
The metal carbide body of claim 1, wherein the intermediate layer comprises tungsten.
Claim 5
Dependent Claim
16 words
The metal carbide body of claim 1, wherein the intermediate layer comprises both molybdenum and tungsten.
Claim 6
Dependent Claim
25 words
The metal carbide body of claim 1, wherein the metallic intermediate layer has been applied to the metal carbide basic body by direct cathode sputtering.
Claim 7
Dependent Claim
35 words
The metal carbide body of claim 1, wherein the metallic intermediate layer comprises 0.1 to 49 weight percent of at least one metal selected from the group consisting of titanium, zirconium, hafnium, niobium and tantalum.
Claim 8
Dependent Claim
41 words
The metal carbide body of claim 1, wherein the metal-free hard substance layers comprise at least one hard substance selected from the group consisting of titanium carbide, titanium nitride, titanium carbonitride, aluminum oxide, zirconium oxide, boron carbide, silicon carbide, titanium diboride.
Claim 9
Dependent Claim
34 words
The metal carbide body of claim 1, wherein the metal-free hard substance layers comprise at least one hard substance selected from the group consisting of titanium carbide, titanium nitride, titanium carbonitride and aluminum oxide.
Claim 10
Dependent Claim
71 words
A process for producing the wear resistant, coated, metal carbide body of claim 1, comprising applying a metallic intermediate layer onto the metal carbide basic body by a physical vapor deposition process, during the deposition of which the metal carbide basic body is maintained at a temperature of from about 200° to 600° C., and applying at least one metal-free hard substance layer onto the metallic intermediate layer by known means.
Claim 11
Dependent Claim
22 words
The process of claim 9, wherein the metallic intermediate layer is applied to the metal carbide basic body by direct cathode sputtering.
Claim 12
Dependent Claim
24 words
The process of claim 9, wherein at least one metal-free hard substance layer is applied to the metallic intermediate layer by reactive cathode sputtering.
Claim 13
Dependent Claim
24 words
The process of claim 9, wherein at least one metal-free hard substance layer is applied to the metallic intermediate layer by gas phase reaction.
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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) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |