Patent US2558708A successfully refreshed from Google Patents.
US4606948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of nickel-chromium/chromium carbide coatings on substrates
Assignee: Westaim Corp
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Filing: 1985-05-20
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Granted: 1986-08-19
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Expires: 2005-05-20
Abstract
Abstract A process for producing a nickel-chromium/chromium carbide coating on a substrate comprises flame spraying nickel/chromium carbide composite powder onto the substrate to cause burnout of some of the carbon in the carbide during spraying with the result that some of the chromium becomes alloyed with the nickel. The nickel/chromium carbide composite powder comprises particles each having a core of chromium carbide at least partially coated with nickel, and the coating comprises chromium carbide particles in a matrix of nickel-chromium alloy.
Inventors
- 👤 Karel Hajmrle
- 👤 Vilnis Silins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:46
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12181
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
100 words
A process for producing a nickel-chromium/chromium carbide coating on a substrate comprising providing nickel/chromium carbide composite powder comprising particles each having a core of chromium carbide at least partially coated with nickel without chromium being present in the nickel coating, and flame spraying said nickel/chromium carbide composite powder onto the substrate to cause burn-out of some of the carbon in the chromium carbide during spraying with the result that some of the chromium of the chromium carbide becomes alloyed with the nickel to produce a sprayed coating on the substrate comprising chromium carbide particles in a matrix of nickel-chromium alloy.
Claim 2
Dependent Claim
100 words
A process for producing a nickel-chromium/chromium carbide coating on a substrate comprising providing nickel/chromium carbide composite powder comprising particles each having a core of chromium carbide at least partially coated with nickel without chromium being present in the nickel coating, and flame spraying said nickel/chromium carbide composite powder onto the substrate to cause burn-out of some of the carbon in the chromium carbide during spraying with the result that some of the chromium of the chromium carbide becomes alloyed with the nickel to produce a sprayed coating on the substrate comprising chromium carbide particles in a matrix of nickel-chromium alloy.
Claim 3
Dependent Claim
33 words
A process according to claim 1 wherein the nickel/chromium carbide composite powder comprises particles whose chromium carbide cores are of a size in the range of from about 1 to about 100 μm.
Claim 4
Dependent Claim
33 words
A process according to claim 2 wherein the nickel/chromium carbide composite powder comprises particles whose chromium carbide cores are of a size in the range of from about 5 to about 25 μm.
Claim 5
Dependent Claim
26 words
A process according to claim 1 wherein the nickel content of each particle is in the range of from about 1 to about 80% by weight.
Claim 6
Dependent Claim
26 words
A process according to claim 4 wherein the nickel content of each particle is in the range of from about 15 to about 45% by weight.
Claim 7
Dependent Claim
53 words
A process according to claim 1 wherein the nickel/chromium carbide composite powder comprises particles whose nickel content of each particle is in the range of from about 1 to about 80% by weight and whose chromium carbide cores are of a size in the range of from about 1 to about 100 μm.
Claim 8
Dependent Claim
53 words
A process according to claim 1 wherein the nickel/chromium carbide composite powder comprises particles whose nickel content of each particle is in the range of from about 15 to about 45% by weight and whose chromium carbide cores are of a size in the range of from about 5 to about 25 μm.
Claim 9
Dependent Claim
37 words
A process according to claim 1 wherein the nickel/chromium carbide composite powder comprises particles each having a core of chromium carbide at least partially coated with nickel and at least one of the elements cobalt and molybdenum.
Claim 10
Dependent Claim
29 words
A process according to claim 8 wherein the nickel/chromium carbide composite powder comprises particles each having a core of chromium carbide at least partially coated with nickel and cobalt.
Claim 11
Dependent Claim
29 words
A process according to claim 8 wherein the nickel/chromium carbide composite powder comprises particles each having a core of chromium carbide at least partially coated with nickel and molybdenum.
Claim 12
Dependent Claim
30 words
A process according to claim 8 wherein the nickel/chromium carbide composite powder comprises particles each having a corre of chromium carbide at least partially coated with nickel, cobalt and molybdenum.
Claim 13
Dependent Claim
43 words
A process according to claim 1 wherein the chromium carbide cores of the composite powder particles comprises a chromium carbide selected from the group consisting of Cr 3 C 2 , Cr 23 C 6 , Cr 7 C 3 and mixtures thereof.
Claim 14
Dependent Claim
19 words
A process according to claim 1 wherein the chromium carbide cores of the composite powder particles also contain molybdenum.
Claim 15
Dependent Claim
27 words
A process according to claim 1 wherein the nickel-chromium matrix of the sprayed coating on the substrate contains from about 1 to about 50% chromium by weight.
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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |