Patent US4626477A successfully refreshed from Google Patents.
US4626477A
Expired / Lapsed
US
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Wear and corrosion resistant coatings and method for producing the same
Assignee: Praxair ST Technology Inc
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Filing: 1986-02-20
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Granted: 1986-12-02
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Expires: 2006-02-20
Abstract
Abstract A coating composition applied to a substrate by a thermal spray process which consists essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Inventors
- 👤 John E. Jackson
- 👤 Thomas A. Adler
- 👤 Jean M. Quets
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:04
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06; C22C29/08; C23; C23C; C23C4/00; C23C4/04; C23C4/06; C23C4/067; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T442/00; Y10T442/20; Y10T442/2139; Y10T442/2148; Y10T442/273
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
50 words
A coating composition which has been applied to a substrate by a thermal spray process which consists essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 2
Dependent Claim
50 words
A coating composition which has been applied to a substrate by a thermal spray process which consists essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 3
Dependent Claim
41 words
A coating composition according to claim 1 consisting essentially of from about 7.0 to about 8.5 weight percent cobalt, from about 2.5 to about 3.5 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 4
Dependent Claim
18 words
A coating composition according to claim 1 having a hardness value in excess of 900 DPH 300 .
Claim 5
Dependent Claim
56 words
A coating composition according to claim 1 wherein the substrate is a metallic material selected from the group consisting of steel, stainless steel, iron base alloys, nickel, nickel base alloys, cobalt, cobalt base alloys, chromium, chromium base alloys, titanium, titanium base alloys, aluminum, aluminum base alloys, copper, copper base alloys, refractory metals, and refractory-metal base alloys.
Claim 6
Dependent Claim
25 words
A coating composition according to claim 1 wherein the substrate is a non metallic material selected from the group consisting of carbon, graphite and polymers.
Claim 7
Dependent Claim
59 words
An article comprising a substrate and a coating composition applied to said substrate by a thermal spray process, said coating composition which has been applied consisting essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 8
Dependent Claim
59 words
An article comprising a substrate and a coating composition applied to said substrate by a thermal spray process, said coating composition which has been applied consisting essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 9
Dependent Claim
44 words
An article according to claim 6 wherein said coating composition consists essentially of from about 7.0 to about 8.5 weight percent cobalt, from about 2.5 to about 3.5 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 10
Dependent Claim
107 words
An article comprising a substrate and a coating composition applied to said substrate by a D-Gun deposition process, wherein said coating composition which has been applied consists essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten, and wherein said coating has a hardness value in excess of about 900 DPH 300 , an average volume loss of about 1.1 mm 3 per 1000 revolutions when subjected to a standard dry sand/rubber wheel abrasion test and which is easily ground to a smooth finish.
Claim 11
Dependent Claim
107 words
An article comprising a substrate and a coating composition applied to said substrate by a D-Gun deposition process, wherein said coating composition which has been applied consists essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten, and wherein said coating has a hardness value in excess of about 900 DPH 300 , an average volume loss of about 1.1 mm 3 per 1000 revolutions when subjected to a standard dry sand/rubber wheel abrasion test and which is easily ground to a smooth finish.
Claim 12
Dependent Claim
23 words
An article according to claim 10 wherein the major portion of said coating composition comprises a mixture of WC and (W,Cr,Co) 2 C.
Claim 13
Dependent Claim
107 words
An article comprising a substrate and a coating composition applied to said substrate by a plasma spray process, wherein said coating composition which has been applied consists essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten, and wherein said coating has a hardness value in excess of about 830 DPH 300 , an average volume loss of about 4.1 mm 3 per 1000 revolutions when subjected to a standard dry sand/rubber wheel abrasion test and which is easily ground to a smooth finish.
Claim 14
Dependent Claim
107 words
An article comprising a substrate and a coating composition applied to said substrate by a plasma spray process, wherein said coating composition which has been applied consists essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten, and wherein said coating has a hardness value in excess of about 830 DPH 300 , an average volume loss of about 4.1 mm 3 per 1000 revolutions when subjected to a standard dry sand/rubber wheel abrasion test and which is easily ground to a smooth finish.
Claim 15
Dependent Claim
23 words
An article according to claim 10 wherein the major portion of said coating composition comprises a mixture of WC and (W,Cr,Co) 2 C.
Claim 16
Dependent Claim
54 words
A powdered coating composition for applying a wear and corrosion resistant coating to a substrate by a thermal spray process consisting essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 17
Dependent Claim
54 words
A powdered coating composition for applying a wear and corrosion resistant coating to a substrate by a thermal spray process consisting essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 18
Dependent Claim
42 words
A powdered coating composition according to claim 12 consisting essentially of from about 7.0 to about 8.5 weight percent cobalt, from about 2.5 to about 3.5 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 19
Dependent Claim
12 words
A powdered coating composition according to claim 12 consisting of sintered powder.
Claim 20
Dependent Claim
42 words
A powdered coating composition according to claim 12 consisting essentially of from about 7.0 to about 9.0 weight percent cobalt from about 3.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 21
Dependent Claim
30 words
A powdered coating composition according to claim 15 consisting essentially of about 7.7 weight percent cobalt, about 3.5 weight percent chromium, about 3.8 weight percent carbon and the balance tungsten.
Claim 22
Dependent Claim
123 words
In a method for coating a substrate wherein a powdered coating material is suspended within a high temperature, high velocity gaseous stream and heated to a temperature at least close to the melting point thereof, said gaseous stream being directed against a surface of said substrate to deposit said powdered coating material and form a coating thereon, the improvement for increasing the wear resistance of said coating, said improvement comprising a powdered coating material having a composition such that the coating composition which has been deposited onto said substrate consists essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 23
Dependent Claim
123 words
In a method for coating a substrate wherein a powdered coating material is suspended within a high temperature, high velocity gaseous stream and heated to a temperature at least close to the melting point thereof, said gaseous stream being directed against a surface of said substrate to deposit said powdered coating material and form a coating thereon, the improvement for increasing the wear resistance of said coating, said improvement comprising a powdered coating material having a composition such that the coating composition which has been deposited onto said substrate consists essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 24
Dependent Claim
60 words
A method according to claim 17 wherein the powdered coating material has a composition such that the coating composition which has been deposited onto said substrate consists essentially of from about 7.0 to about 8.5 weight percent cobalt, from about 2.5 to about 3.5 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 25
Dependent Claim
26 words
A method according to claim 17 wherein the powdered coating material is suspended within a high temperature, high velocity gaseous stream produced by a detonation device.
Claim 26
Dependent Claim
48 words
A method according to claim 17 wherein the powdered coating material has a composition consisting essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 27
Dependent Claim
48 words
A method according to claim 20 wherein the powdered coating material has a composition consisting essentially of from about 7.0 to about 9.0 weight percent cobalt from about 3.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 28
Dependent Claim
26 words
A method according to claim 12 wherein the powdered coating material is suspended within a high temperature, high velocity gaseous stream produced by plasma arc torch.
Claim 29
Dependent Claim
25 words
A method according to claim 22 wherein the powdered coating material has a composition which is substantially the same as the composition of said coating.
Claim 30
Independent Claim
132 words
A method for coating a substrate comprising: feeding a mixture of oxygen and a fuel gas into the barrel of a detonation gun along with a powdered coating material; igniting the oxygen and fuel gas mixture to produce a detonation wave along the length of said barrel which accelerates said powdered coating material in a high temperature, high velocity gaseous stream; and directing said gaseous stream against a surface of said substrate to deposit said powdered coating material and form a coating thereon, said powdered coating material having a composition such that the coating deposited onto said substrate consists essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 31
Independent Claim
132 words
A method for coating a substrate comprising: feeding a mixture of oxygen and a fuel gas into the barrel of a detonation gun along with a powdered coating material; igniting the oxygen and fuel gas mixture to produce a detonation wave along the length of said barrel which accelerates said powdered coating material in a high temperature, high velocity gaseous stream; and directing said gaseous stream against a surface of said substrate to deposit said powdered coating material and form a coating thereon, said powdered coating material having a composition such that the coating deposited onto said substrate consists essentially of from about 6.5 to about 9.0 weight percent cobalt, from about 2.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 32
Dependent Claim
56 words
A method according to claim 24 wherein the powdered coating material has a composition such that the coating deposited onto said substrate consists essentially of from about 7.0 to about 8.5 weight percent cobalt, from about 2.5 to about 3.5 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 33
Dependent Claim
20 words
A method according to claim 24 wherein the ratio of oxygen to fuel gas in said mixture is approximately 1.0.
Claim 34
Dependent Claim
48 words
A method according to claim 26 wherein the powdered coating material has a composition consisting essentially of from about 7.0 to about 9.0 weight percent cobalt, from about 3.0 to about 4.0 weight percent chromium, from about 3.0 to about 4.0 weight percent carbon and the balance tungsten.
Claim 35
Dependent Claim
36 words
A method according to claim 27 wherein the powdered coating material has a composition consisting essentially of about 7.7 weight percent cobalt, about 3.5 weight percent chromium, about 3.8 weigh percent carbon and the balance tungsten.
Claim 36
Dependent Claim
23 words
A method according to claim 24 wherein the ratio of oxygen to fuel gas in said mixture is between about 1.1 and 1.2.
Claim 37
Dependent Claim
36 words
A method according to claim 29 wherein the powdered coating material has a composition consisting essentially of about 10 weight percent cobalt, about 4 weight percent chromium, about 5.2 weight percent carbon and the balance tungsten.
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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) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |