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US4036601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion-resistant turbine blades and method for producing them
Assignee: Gesellschaft fuer Kernforschung mbH
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Filing: 1975-03-26
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Granted: 1977-07-19
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Expires: 1995-03-26
Abstract
Abstract A turbine blade includes a core made of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto the core. The cover forms a gas-tight metallurgical bond with the core and has great strength, high ductility and a uniform layer thickness. The process includes the steps of preshaping a core of highly heat-resistant material and fitting the preshaped core into a substantially preshaped, corrosion-resistant and highly heat-resistant cover. The cover is welded to the core at a point which during later use is subjected only to little stress to form a vacuum-tight seal and workpiece. The workpiece is heated in a pressure vessel to a temperature of at least 1000° C, and the cover of the heated workpiece is heat-welded to the core by isotactic hot-pressing without the formation of pores.
Inventors
- 👤 Peter Weimar
- 👤 Franz Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:12
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/288; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12986
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
106 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of a molybdenum-rhenium alloy having a rhenium content of from 30 to 50 weight percent, the remainder molybdenum, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 2
Dependent Claim
106 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of a molybdenum-rhenium alloy having a rhenium content of from 30 to 50 weight percent, the remainder molybdenum, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 3
Dependent Claim
106 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of a niobium-molybdenum alloy having a molybdenum content of 5 to 20 percent by weight, the remainder niobium, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 4
Dependent Claim
106 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of a niobium-molybdenum alloy having a molybdenum content of 5 to 20 percent by weight, the remainder niobium, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 5
Dependent Claim
107 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of a niobium-tungsten alloy having a tungsten content of from 5 to 10 percent by weight, the remainder niobium, and the protective cover is made from a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 6
Dependent Claim
107 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of a niobium-tungsten alloy having a tungsten content of from 5 to 10 percent by weight, the remainder niobium, and the protective cover is made from a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 7
Dependent Claim
118 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of a vanadium-titanium-niobium alloy having a titanium content of from 1 to 10 percent by weight, a niobium content of from 5 to 20 percent by weight, the remainder vanadium, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 8
Dependent Claim
118 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of a vanadium-titanium-niobium alloy having a titanium content of from 1 to 10 percent by weight, a niobium content of from 5 to 20 percent by weight, the remainder vanadium, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 9
Dependent Claim
96 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of a vanadium-titanium-silicon alloy of the formula V-3Ti-1Si and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and a resistance to oxidation in air at temperatures of about 1200° C.
Claim 10
Dependent Claim
96 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of a vanadium-titanium-silicon alloy of the formula V-3Ti-1Si and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and a resistance to oxidation in air at temperatures of about 1200° C.
Claim 11
Dependent Claim
95 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of an alloy consisting essentially of Mo-Ti-Zr, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 12
Dependent Claim
95 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of an alloy consisting essentially of Mo-Ti-Zr, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 13
Dependent Claim
94 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of an alloy consisting essentially of Ta-8W-HfC, and the protective cover is made of metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 14
Dependent Claim
94 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the core is made of an alloy consisting essentially of Ta-8W-HfC, and the protective cover is made of metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 15
Dependent Claim
92 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the alloy consists essentially of W-3Re-2ThO 2 , and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 16
Dependent Claim
92 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the alloy consists essentially of W-3Re-2ThO 2 , and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 17
Dependent Claim
90 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the alloy consists essentially of Co-27Cr-5Mo, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 18
Dependent Claim
90 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the alloy consists essentially of Co-27Cr-5Mo, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 19
Dependent Claim
90 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the alloy consists essentially of Co-22Cr-10W-9Ta, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 20
Dependent Claim
90 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the alloy consists essentially of Co-22Cr-10W-9Ta, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 21
Dependent Claim
90 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the alloy consists essentially of Ni-15Cr-7Fe-2.5Ti, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 22
Dependent Claim
90 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the alloy consists essentially of Ni-15Cr-7Fe-2.5Ti, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 23
Dependent Claim
90 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the alloy consists essentially of Ni-19Cr-18Fe-5Nb-3Mo, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
Claim 24
Dependent Claim
90 words
Turbine blade comprising a core of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto said core and forming a gas-tight metallurgical bond therewith, said protective cover having great strength, high ductility and a uniform layer thickness, wherein the alloy consists essentially of Ni-19Cr-18Fe-5Nb-3Mo, and the protective cover is made of a metal selected from the group consisting of rhenium, rhodium, iridium, and platinum, said metal having a high melting point and being resistant to oxidation in air at temperatures of about 1200° C.
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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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |