US4087292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titanium base alloy
Assignee: Imperial Metal Industries Kynoch Ltd
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Filing: 1976-05-06
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Granted: 1978-05-02
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Expires: 1996-05-06
Abstract
Abstract A titanium base alloy for aeronautical use having good high temperature creep properties and being oxidation-resistant, the alloy being 5-6wt% aluminum, 21/2-41/2wt% tin, 2-4wt% zirconium, 0.75-1.25wt% niobium, 0.1-0.6wt% molybdenum, 0.2-0.4wt% silicon, balance titanium, apart from incidental impurities. The alloy may be beta heat treated and aged, optionally with an intermediate heat treatment before the aging.
Inventors
- 👤 Donald Francis Neal
- 👤 Paul Addyman Blenkinsop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:28
CPC Classifications
C; C22; C22C; C22C14/00; C22F; C22F1/00; C22F1/16; C22F1/18; C22F1/183
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A titanium alloy consisting essentially of 5.4 to 5.5wt% aluminium, 3.5wt% tin, 3wt% zirconium, 1wt% niobium, 0.25 to 0.3wt% molybdenum, 0.3wt% silicon, balance titanium, apart from incidental impurieties, the alloy being heat treated by soaking in the beta field at 1010° C to 1050° C, cooling to ambient temperature and then ageing for a period of about 24 hours at a temperature in the range 500° to 600° C.
Claim 2
Dependent Claim
69 words
A titanium alloy consisting essentially of 5.4 to 5.5wt% aluminium, 3.5wt% tin, 3wt% zirconium, 1wt% niobium, 0.25 to 0.3wt% molybdenum, 0.3wt% silicon, balance titanium, apart from incidental impurieties, the alloy being heat treated by soaking in the beta field at 1010° C to 1050° C, cooling to ambient temperature and then ageing for a period of about 24 hours at a temperature in the range 500° to 600° C.
Claim 3
Dependent Claim
24 words
An alloy, as claimed in claim 1, in which the chromium, nickel and manganese content of the alloy individually are no greater than 0.02wt%.
Claim 4
Dependent Claim
15 words
The alloy of claim 1 in which the oxygen content is less than 1,500 ppm.
Claim 5
Dependent Claim
16 words
The alloy of claim 3 in which the oxygen content is in the range 1,000-1,200 ppm.
Claim 6
Dependent Claim
19 words
The alloy, as claimed in claim 1 in which the aluminium content is 5.4wt% and the molybdenum is 0.3wt%.
Claim 7
Dependent Claim
22 words
An alloy, as claimed in claim 16, in which the heat treatment temperature in the beta field takes place at 1,035° C.
Claim 8
Dependent Claim
26 words
An alloy, as claimed in claim 1, in which there is an intermediate heat treatment comprising soaking in the range 800°/900° C, before the ageing treatment.
Claim 9
Dependent Claim
16 words
The alloy of claim 7 in which the intermediate heat treatment takes place at 850° C.
Claim 10
Dependent Claim
16 words
An aircraft engine component for use at elevated temperature manufactured from the alloy of claim 1.
References Cited (Backward Citations)
GB757383A
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CH340633A
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GB1124114A
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GB1208319A
Cited
DE1913142A1
Cited
US3619184A
Cited
US3666453A
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DE2224279A1
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DE2316891A1
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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) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |