US4253873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titanium-based alloy having high mechanical strength
Assignee: Toshiba Corp
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Filing: 1979-07-25
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Granted: 1981-03-03
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Expires: 1999-07-25
Abstract
Abstract A titanium-based alloy of a high mechanical strength, which provides an excellent material of, particularly turbine blades, comprising 2.0 to 5.0% by weight of aluminum, 1.0 to 9.0% by weight of molybdenum, 6.1 to 9.0% by weight of chromium, traces of impurities, and titanium constituting the balance. The alloy may further contain 0.05 to 0.2% by weight of silicon and/or 0.001 to 0.05% by weight of boron, as required.
Inventors
- 👤 Masayuki Sagoi
- 👤 Masayuki Itoh
- 👤 Masami Miyauchi
- 👤 Osamu Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:02
CPC Classifications
C; C22; C22C; C22C14/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
59 words
A titanium-based alloy of a high mechanical strength, comprising 2.0 to 5.0% by weight of aluminum, 1.5 to 5.0% by weight of molybdenum, 6.1 to 9.0% by weight of chromium, and the balance of titanium, the alloy having a tensile strength of more than 88 kg/mm 2 and an impact strength of more than 6.6 kg. m/cm 2 .
Claim 2
Dependent Claim
59 words
A titanium-based alloy of a high mechanical strength, comprising 2.0 to 5.0% by weight of aluminum, 1.5 to 5.0% by weight of molybdenum, 6.1 to 9.0% by weight of chromium, and the balance of titanium, the alloy having a tensile strength of more than 88 kg/mm 2 and an impact strength of more than 6.6 kg. m/cm 2 .
Claim 3
Dependent Claim
33 words
The alloy according to claim 1, comprising 2.5 to 4.5% by weight of aluminum, 1.5 to 5.0% by weight of molybdenum, 6.1 to 8.0% by weight of chromium, and the balance of titanium.
Claim 4
Dependent Claim
18 words
The alloy according to claim 1 or 2, which further comprises 0.05 to 0.2% by weight of silicon.
Claim 5
Dependent Claim
18 words
The alloy according to claim 1 or 2, which further comprises 0.001 to 0.05% by weight of boron.
Claim 6
Dependent Claim
26 words
The alloy according to claim 1 or 2, which further comprises 0.05 to 0.2% by weight of silicon and 0.001 to 0.05% by weight of boron.
Claim 7
Dependent Claim
54 words
A blade material, comprising 2.0 to 5.0% by weight of aluminum, 1.5 to 5.0% by weight of molybdenum, 6.1 to 9.0% by weight of chromium, and the balance of titanium, the blade material having a tensile strength of more than 88 kg/mm 2 and an impact strength of more than 6.6 kg.m/cm 2 .
Claim 8
Dependent Claim
54 words
A blade material, comprising 2.0 to 5.0% by weight of aluminum, 1.5 to 5.0% by weight of molybdenum, 6.1 to 9.0% by weight of chromium, and the balance of titanium, the blade material having a tensile strength of more than 88 kg/mm 2 and an impact strength of more than 6.6 kg.m/cm 2 .
Claim 9
Dependent Claim
34 words
The blade material according to claim 6, comprising 2.5 to 4.5% by weight of aluminum, 1.5 to 5.0% by weight of molybdenum, 6.1 to 8.0% by weight of chromium, and the balance of titanium.
Claim 10
Dependent Claim
19 words
The blade material according to claim 6 or 7, which further comprises 0.05 to 0.2% by weight of silicon.
Claim 11
Dependent Claim
19 words
The blade material according to claim 6 or 7, which further comprises 0.001 to 0.05% by weight of boron.
Claim 12
Dependent Claim
27 words
The blade material according to claim 6 or 7, which further comprises 0.05 to 0.2% by weight of silicon and 0.001 to 0.05% by weight of boron.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |