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Patent US4507151A successfully refreshed from Google Patents.
US4507151A
Expired / Lapsed
US
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Coating material for the formation of abrasion-resistant and impact-resistant coatings on workpieces
Assignee: ECG Immobilier SA
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Filing: 1981-11-20
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Granted: 1985-03-26
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Expires: 2001-11-20
Abstract
Abstract A flame spray powder composition is provided for the thermal coating of workpieces comprising a mechanical mixture of hard particles of material and particles of a matrix-forming self-fluxing alloy selected from the group consisting of Ni-base, Fe-base and Co-base self-fluxing alloys. The hard material is a fused tungsten carbide alloy consisting essentially by weight of about 3 to 7% C, an effective amount of iron ranging up to about 3%, up to about 2% total of other alloying elements and the balance essentially tungsten. Substantially each of the fused tungsten carbide alloy particles is characterized by a metal coating having a melting point higher than the melting point of the self-fluxing alloy and having an average particle size less than about 75 microns. The proportion by weight of the coated hard particles in the mixture ranges from about 10% to 95%, with the balance essentially said self-fluxing alloy. The flame sprayed coating produced from the powder mixture on a workpiece is characterized by a strongly bonded coating having high resistance to abrasion and impact and by uniform properties across the cross section of the coating.
Inventors
- 👤 Wolfgang Simm
- 👤 Hans-Theo Steine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:46
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12181
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
164 words
A flame spray powder composition for the thermal coating of workpieces comprising a mechanical mixture of hard particles of material and particles of a matrix-forming self-fluxing alloy selected from the group consisting of Ni-base, Fe-base and Co-base self-fluxing alloys, said hard material being a fused tungsten carbide alloy consisting essentially by weight of about 3 to 7% C, from 0 to about 3% iron, up to about 2% total of other alloying elements and the balance essentially tungsten, substantially each of said fused tungsten carbide alloy particles being characterized by a coating of about 2 to 20% by weight of a metal selected from the group consisting of Ni, Fe and Co having a melting point higher than the melting point of the self-fluxing alloy and having an average particle size less than about 75 microns, the proportion by weight of the coated hard particles in the mixture ranging from about 10% to 95%, with the balance of the mixture essentially said self-fluxing alloy.
Claim 2
Dependent Claim
164 words
A flame spray powder composition for the thermal coating of workpieces comprising a mechanical mixture of hard particles of material and particles of a matrix-forming self-fluxing alloy selected from the group consisting of Ni-base, Fe-base and Co-base self-fluxing alloys, said hard material being a fused tungsten carbide alloy consisting essentially by weight of about 3 to 7% C, from 0 to about 3% iron, up to about 2% total of other alloying elements and the balance essentially tungsten, substantially each of said fused tungsten carbide alloy particles being characterized by a coating of about 2 to 20% by weight of a metal selected from the group consisting of Ni, Fe and Co having a melting point higher than the melting point of the self-fluxing alloy and having an average particle size less than about 75 microns, the proportion by weight of the coated hard particles in the mixture ranging from about 10% to 95%, with the balance of the mixture essentially said self-fluxing alloy.
Claim 3
Dependent Claim
74 words
The flame spray powder composition of claim 1, wherein the metal coating on the fused tungsten carbide alloy particles in the powder mixture is selected from the group consisting of Ni, Fe, and Co, and wherein the self-fluxing alloy is a nickel-base alloy containing about 0.2 to 18% Cr, about 1.5 to 4.5% B, about 1 to 4.5% Si, about 0.01 to 1.5% C, about 0.2 to 20% Fe and the balance essentially Ni.
Claim 4
Dependent Claim
74 words
The flame spray powder composition of claim 1, wherein the metal coating on the fused tungsten carbide alloy particles in the powder mixture is selected from the group consisting of Ni, Fe and Co, and wherein the self-fluxing alloy is a cobalt-base alloy containing about 10 to 35% Cr, about 0.2 to 30% Ni, about 0.05 to 1.5% C, 0 to about 1.5% W, 0 to about 10% Mo and the balance essentially Co.
Claim 5
Dependent Claim
45 words
The flame spray powder of claim 1, wherein the fused tungsten carbode alloy in the powder mixture consists essentially by weight of about 3.5 to 5.5% C, up to about 0.2% Fe, a maximum of about 0.1% of other elements, and the balance essentially tungsten.
Claim 6
Dependent Claim
27 words
The flame spray powder of claim 1, wherein the average particle size of the coated hard material in the powder mixture is less than about 62 microns.
Claim 7
Dependent Claim
34 words
The flame spray powder of claim 1, wherein the proportion by weight of the coated hard material in the powder mixture ranges from about 40 to 80%, and the balance essentially said self-fluxing alloy.
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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) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |