US4174213A
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US
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Highly ductile alloys of iron-nickel-chromium-molybdenum system for gas turbine combustor liner and filler metals
Assignee: Hitachi Ltd
•
Filing: 1978-03-01
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Granted: 1979-11-13
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Expires: 1998-03-01
Abstract
Abstract The present alloys of iron-nickel-chromium-molybdenum system are alloys having high strength and ductility, comprising 0.03-0.2% by weight of carbon, not more than 2% by weight of silicon, not more than 2% by weight of manganese, 42-70% by weight of nickel, 15-35% by weight of chromium, 4.5-15% by weight of molybdenum, 0.05-1.0% by weight of at least one of Ti and Nb as additive elements, and 7.5-35% by weight of iron, the balance being incidental impurities, or further contain 0.1-10% by weight of at least one of tungsten and cobalt as reinforcing elements.
Inventors
- 👤 Yutaka Fukui
- 👤 Fumio Hataya
- 👤 Tetsuo Kashimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:21
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/053
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
69 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of 0.03-0.2% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 42-70% by weight of nickel, 15-35% by weight of chromium, 4.5-15% by weight of molybdenum, 0.05-1% by weight of at least one of titanium and niobium as an additive element, and 7.5-35% by weight of iron, the balance being incidental impurities.
Claim 2
Dependent Claim
69 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of 0.03-0.2% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 42-70% by weight of nickel, 15-35% by weight of chromium, 4.5-15% by weight of molybdenum, 0.05-1% by weight of at least one of titanium and niobium as an additive element, and 7.5-35% by weight of iron, the balance being incidental impurities.
Claim 3
Dependent Claim
12 words
An alloy according to claim 1, wherein the additive element is titanium.
Claim 4
Dependent Claim
12 words
An alloy according to claim 1, wherein the additive element is niobium.
Claim 5
Dependent Claim
20 words
An alloy according to claim 1, wherein the additive element is 0.05-1.0% by weight in total of titanium and niobium.
Claim 6
Dependent Claim
69 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of 0.05-0.15% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 44-50% by weight of nickel, 22-30% by weight of chromium, 5-10% by weight of molybdenum, 0.2-0.6% by weight of at least one of titanium and niobium as an additive element, and 15-25% by weight of iron, the balance being incidental impurities.
Claim 7
Dependent Claim
69 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of 0.05-0.15% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 44-50% by weight of nickel, 22-30% by weight of chromium, 5-10% by weight of molybdenum, 0.2-0.6% by weight of at least one of titanium and niobium as an additive element, and 15-25% by weight of iron, the balance being incidental impurities.
Claim 8
Dependent Claim
12 words
An alloy according to claim 5, wherein the additive element is titanium.
Claim 9
Dependent Claim
12 words
An alloy according to claim 5, wherein the additive element is niobium.
Claim 10
Dependent Claim
20 words
An alloy according to claim 5, wherein the additive element is 0.2-0.6% by weight in total of titanium and niobium.
Claim 11
Dependent Claim
68 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of about 0.06% by weight of carbon, about 0.8% by weight of silicon, about 1.5% by weight of manganese, about 47% by weight of nickel, about 26.5% by weight of chromium, about 6% by weight of molybdenum, about 0.4% by weight of titanium, about 0.4% by weight of niobium, the balance being iron and incidental impurities.
Claim 12
Dependent Claim
68 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of about 0.06% by weight of carbon, about 0.8% by weight of silicon, about 1.5% by weight of manganese, about 47% by weight of nickel, about 26.5% by weight of chromium, about 6% by weight of molybdenum, about 0.4% by weight of titanium, about 0.4% by weight of niobium, the balance being iron and incidental impurities.
Claim 13
Dependent Claim
84 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of 0.03-0.2% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 42-70% by weight of nickel, 15-35% by weight of chromium, 4.5-12% by weight of molybdenum, 0.05-1% by weight of at least one of titanium and niobium as an additive element, 0.1-10% by weight of at least one of tungsten and cobalt as an intensifying element, and 7.5-35% by weight of iron, the balance being incidental impurities.
Claim 14
Dependent Claim
84 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of 0.03-0.2% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 42-70% by weight of nickel, 15-35% by weight of chromium, 4.5-12% by weight of molybdenum, 0.05-1% by weight of at least one of titanium and niobium as an additive element, 0.1-10% by weight of at least one of tungsten and cobalt as an intensifying element, and 7.5-35% by weight of iron, the balance being incidental impurities.
Claim 15
Dependent Claim
84 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of 0.05-0.15% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 44-50% by weight of nickel, 22-30% by weight of chromium, 5-10% by weight of molybdenum, 0.2-0.6% by weight of at least one of titanium and niobium as an additive element, 0.3-5% by weight of at least one of tungsten and cobalt as an intensifying element, and 15-25% by weight of iron, the balance being incidental impurities.
Claim 16
Dependent Claim
84 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of 0.05-0.15% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 44-50% by weight of nickel, 22-30% by weight of chromium, 5-10% by weight of molybdenum, 0.2-0.6% by weight of at least one of titanium and niobium as an additive element, 0.3-5% by weight of at least one of tungsten and cobalt as an intensifying element, and 15-25% by weight of iron, the balance being incidental impurities.
Claim 17
Dependent Claim
20 words
An alloy according to claim 11, wherein the additive element is titanium and niobium, and the intensifying element is tungsten.
Claim 18
Dependent Claim
20 words
An alloy according to claim 11, wherein the additive element is titanium and niobium, and the intensifying element is cobalt.
Claim 19
Dependent Claim
20 words
An alloy according to claim 11, wherein the additive element is titanium, and the intensifying element is tungsten and cobalt.
Claim 20
Dependent Claim
22 words
An alloy according to claim 11, wherein the additive element is titanium and niobium, and the intensifying element is tungsten and cobalt.
Claim 21
Dependent Claim
81 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of about 0.1% by weight of carbon, about 0.5% by weight of silicon, about 0.7% by weight of manganese, about 46% by weight of nickel, about 22% by weight of chromium, about 9% by weight of molybdenum, about 0.6% by weight of tungsten, about 1.5% by weight of cobalt, about 0.4% by weight of titanium, and about 0.4% by weight of niobium, the balance being iron and incidental impurities.
Claim 22
Dependent Claim
81 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of about 0.1% by weight of carbon, about 0.5% by weight of silicon, about 0.7% by weight of manganese, about 46% by weight of nickel, about 22% by weight of chromium, about 9% by weight of molybdenum, about 0.6% by weight of tungsten, about 1.5% by weight of cobalt, about 0.4% by weight of titanium, and about 0.4% by weight of niobium, the balance being iron and incidental impurities.
Claim 23
Dependent Claim
82 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of 0.03-0.2% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 42-70% by weight of nickel, 15-35% by weight of chromium, 4.5-15% by weight of molybdenum, 0.05-1% by weight of at least one of titanium and niobium as an additive element, and 7.5-35% by weight of iron, the balance being incidental impurities, and the alloy being processed by at least one of rolling and forging.
Claim 24
Dependent Claim
82 words
An alloy of iron-nickel-chromium-molybdenum system having a high ductility, which consists essentially of 0.03-0.2% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 42-70% by weight of nickel, 15-35% by weight of chromium, 4.5-15% by weight of molybdenum, 0.05-1% by weight of at least one of titanium and niobium as an additive element, and 7.5-35% by weight of iron, the balance being incidental impurities, and the alloy being processed by at least one of rolling and forging.
Claim 25
Dependent Claim
114 words
A combustor for a gas turbine comprising a fuel nozzle for injecting fuel, a liner for combusting the injected fuel, and a transition piece having a throttled open end at nozzle side for supplying combustion gas to a turbine nozzle, at least one of the liner and the transition piece being made of an alloy consisting essentially of 0.03-0.2% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 42-70% by weight of nickel, 15-35% by weight of chromium 4.5-12% by weight of molybdenum, 0.05-1.0% by weight of at least one of titanium and niobium as an additive element, and 7.5-35% by weight of iron, the balance being incidental impurities.
Claim 26
Dependent Claim
114 words
A combustor for a gas turbine comprising a fuel nozzle for injecting fuel, a liner for combusting the injected fuel, and a transition piece having a throttled open end at nozzle side for supplying combustion gas to a turbine nozzle, at least one of the liner and the transition piece being made of an alloy consisting essentially of 0.03-0.2% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 42-70% by weight of nickel, 15-35% by weight of chromium 4.5-12% by weight of molybdenum, 0.05-1.0% by weight of at least one of titanium and niobium as an additive element, and 7.5-35% by weight of iron, the balance being incidental impurities.
Claim 27
Dependent Claim
12 words
A combustor according to claim 18, wherein the additive element is titanium.
Claim 28
Dependent Claim
12 words
A combustor according to claim 18, wherein the additive element is niobium.
Claim 29
Dependent Claim
19 words
A combustor according to claim 18, wherein the additive element is 0.05-1.0% by weight of both titanium and niobium.
Claim 30
Dependent Claim
114 words
A combustor for a gas turbine comprising a fuel nozzle for injecting fuel, a liner for combusting the injected fuel, and a transition piece having a throttled open end at nozzle side for supplying combustion gas to a turbine nozzle, at least one of the liner and the transition piece being made of an alloy consisting essentially of 0.05-0.15% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 44-50% by weight of nickel, 22-30% by weight of chromium, 5-10% by weight of molybdenum, 0.2-0.6% by weight of at least one of titanium and niobium as an additive element, and 15-25% by weight of iron, the balance being incidental impurities.
Claim 31
Dependent Claim
114 words
A combustor for a gas turbine comprising a fuel nozzle for injecting fuel, a liner for combusting the injected fuel, and a transition piece having a throttled open end at nozzle side for supplying combustion gas to a turbine nozzle, at least one of the liner and the transition piece being made of an alloy consisting essentially of 0.05-0.15% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 44-50% by weight of nickel, 22-30% by weight of chromium, 5-10% by weight of molybdenum, 0.2-0.6% by weight of at least one of titanium and niobium as an additive element, and 15-25% by weight of iron, the balance being incidental impurities.
Claim 32
Dependent Claim
12 words
A combustor according to claim 22, wherein the additive element is titanium.
Claim 33
Dependent Claim
12 words
A combustor according to claim 22, wherein the additive element is niobium.
Claim 34
Dependent Claim
18 words
A combustor according to claim 22, wherein the additive is 0.2-0.6% by weight of both titanium and niobium.
Claim 35
Dependent Claim
129 words
A combustor for a gas turbine comprising a fuel nozzle for injecting fuel, a liner for combusting the injected fuel, and a transition piece having a throttled open end at nozzle side for supplying combustion gas to a turbine nozzle, at least one of the liner and the transition piece being made of an alloy consisting essentially of 0.05-0.15% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 44-50% by weight of nickel, 22-30% by weight of chromium, 5-10% by weight of molybdenum, 0.2-0.6% by weight of at least one of titanium and niobium as an additive element, 0.3-5% by weight of at least one of tungsten and cobalt as an intensifying element, and 15-25% by weight of iron, the balance being incidental impurities.
Claim 36
Dependent Claim
129 words
A combustor for a gas turbine comprising a fuel nozzle for injecting fuel, a liner for combusting the injected fuel, and a transition piece having a throttled open end at nozzle side for supplying combustion gas to a turbine nozzle, at least one of the liner and the transition piece being made of an alloy consisting essentially of 0.05-0.15% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 44-50% by weight of nickel, 22-30% by weight of chromium, 5-10% by weight of molybdenum, 0.2-0.6% by weight of at least one of titanium and niobium as an additive element, 0.3-5% by weight of at least one of tungsten and cobalt as an intensifying element, and 15-25% by weight of iron, the balance being incidental impurities.
Claim 37
Dependent Claim
12 words
A combustor according to claim 26, wherein the intensifying element is tungsten.
Claim 38
Dependent Claim
12 words
A combustor according to claim 26, wherein the intensifying element is cobalt.
Claim 39
Dependent Claim
14 words
A combustor according to claim 26, wherein the intensifying element is tungsten and cobalt.
Claim 40
Dependent Claim
114 words
A combustor for a gas turbine comprising a fuel nozzle for injecting fuel, a liner for combusting the injected fuel, and a transition piece having a throttled open end at nozzle side for supplying combustion gas to a turbine nozzle, at least one of the liner and the transition piece being made of an alloy consisting essentially of about 0.06% by weight of carbon, about 0.8% by weight of silicon, about 1.5% by weight of manganese, about 47% by weight of nickel, about 27% by weight of chromium, about 6% by weight of molybdenum, about 0.4% by weight of titanium, and about 0.4% by weight of niobium, the balance being iron and incidental impurities.
Claim 41
Dependent Claim
114 words
A combustor for a gas turbine comprising a fuel nozzle for injecting fuel, a liner for combusting the injected fuel, and a transition piece having a throttled open end at nozzle side for supplying combustion gas to a turbine nozzle, at least one of the liner and the transition piece being made of an alloy consisting essentially of about 0.06% by weight of carbon, about 0.8% by weight of silicon, about 1.5% by weight of manganese, about 47% by weight of nickel, about 27% by weight of chromium, about 6% by weight of molybdenum, about 0.4% by weight of titanium, and about 0.4% by weight of niobium, the balance being iron and incidental impurities.
Claim 42
Dependent Claim
126 words
A combustor for a gas turbine comprising a fuel nozzle for injecting fuel, a liner for combusting the injected fuel, and a transition piece having a throttled open end at nozzle side for supplying combustion gas to a turbine nozzle, at least one of the liner and the transition piece being made of an alloy consisting essentially of about 0.1% by weight of carbon, about 0.5% by weight of silicon, about 0.7% by weight of manganese, about 46% by weight of nickel, about 22% by weight of chromium, about 9% by weight of molybdenum, about 0.6% by weight of tungsten, about 1.5% by weight of cobalt, about 0.4% by weight of titanium, and about 0.4% by weight of niobium, the balance being iron and incidental impurities.
Claim 43
Dependent Claim
126 words
A combustor for a gas turbine comprising a fuel nozzle for injecting fuel, a liner for combusting the injected fuel, and a transition piece having a throttled open end at nozzle side for supplying combustion gas to a turbine nozzle, at least one of the liner and the transition piece being made of an alloy consisting essentially of about 0.1% by weight of carbon, about 0.5% by weight of silicon, about 0.7% by weight of manganese, about 46% by weight of nickel, about 22% by weight of chromium, about 9% by weight of molybdenum, about 0.6% by weight of tungsten, about 1.5% by weight of cobalt, about 0.4% by weight of titanium, and about 0.4% by weight of niobium, the balance being iron and incidental impurities.
Claim 44
Dependent Claim
63 words
A filler metal, which consists essentially of 0.03-0.2% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 42-70% by weight of nickel, 15-35% by weight of chromium, 4.5-15% by weight of molybdenum, 0.05-1% by weight of at least one of titanium and niobium as an additive element, and 7.5-35% by weight of iron, the balance being incidental impurities.
Claim 45
Dependent Claim
63 words
A filler metal, which consists essentially of 0.03-0.2% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 42-70% by weight of nickel, 15-35% by weight of chromium, 4.5-15% by weight of molybdenum, 0.05-1% by weight of at least one of titanium and niobium as an additive element, and 7.5-35% by weight of iron, the balance being incidental impurities.
Claim 46
Dependent Claim
63 words
A filler metal, which consists essentially of 0.05-0.15% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 44-50% by weight of nickel, 22-30% by weight of chromium, 5-10% by weight of molybdenum, 0.2-0.6% by weight of at least one of titanium and niobium as an additive element, and 15-25% by weight of iron, the balance being incidental impurities.
Claim 47
Dependent Claim
63 words
A filler metal, which consists essentially of 0.05-0.15% by weight of carbon, 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 44-50% by weight of nickel, 22-30% by weight of chromium, 5-10% by weight of molybdenum, 0.2-0.6% by weight of at least one of titanium and niobium as an additive element, and 15-25% by weight of iron, the balance being incidental impurities.
Claim 48
Dependent Claim
78 words
A filler metal, which consists essentially of 0.05-0.15% by weight of carbon 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 44-50% by weight of nickel, 22-30% by weight of chromium, 5-10% by weight of molybdenum, 0.2-0.6% by weight of at least one of titanium and niobium as an additive element, 0.3-5% by weight of at least one of tungsten and cobalt as an intensifying element, and 15-25% by weight of iron, the balance being incidental impurities.
Claim 49
Dependent Claim
78 words
A filler metal, which consists essentially of 0.05-0.15% by weight of carbon 0.5-1.5% by weight of silicon, 0.5-2% by weight of manganese, 44-50% by weight of nickel, 22-30% by weight of chromium, 5-10% by weight of molybdenum, 0.2-0.6% by weight of at least one of titanium and niobium as an additive element, 0.3-5% by weight of at least one of tungsten and cobalt as an intensifying element, and 15-25% by weight of iron, the balance being incidental impurities.
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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) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |