US4634478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titanium molybdenum alloy superior in resistance to pitting corrosion in bromide ion environment
Assignee: KOBE SEIKO SHO 18 WAKINOHAMA-CHO 1-CHOME CHUO-KU KOBE 651 JAPAN KK
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Filing: 1985-08-12
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Granted: 1987-01-06
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Expires: 2005-08-12
Abstract
Abstract There is provided a Ti-Mo alloy containing 0.2 to 3.0 wt % of molybdenum, with the balance being substantially titanium, characterized in that the amount of Fe in the impurities is not greater than 0.1% and the amount of O 2 in the impurities is in the range that satisfies the following equation on the basis of the amount of Mo (%). O.sub.2 (%)≦9/35-1/28·Mo (%) said titanium alloy being highly resistant to pitting corrosion in an environment where there are bromide ions and being superior in formability. Said alloy undergoes heating at a temperature higher than 700° C. and lower than the α-transformation point and then cooling at a rate of 500° C./min or less, whereby said alloy is rendered malleable.
Inventors
- 👤 Kazutoshi Shimogori
- 👤 Hiroshi Satoh
- 👤 Fumio Kamikubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:09
CPC Classifications
C; C22; C22C; C22C14/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A Ti-Mo alloy consisting essentially of 0.2 to 3.0 wt % of molybdenum, with the balance being substantially titanium, characterized in that the amount of Fe in the impurities is not greater than 0.1% and the amount of O 2 in the impurities is in the range that satisfies the following equation on the basis of the amount of Mo (%). O.sub.2 (%)≦9/35-1/28·Mo (%) said titanium alloy having been heated at a temperature higher than 700° C. and lower than the β-transformation point and then cooled at a rate of 500° C./min or less whereby an alloy is obtained highly reistant to pitting corrosion in an environment where there are bromide ions and which is malleable and superior in formability.
Claim 2
Dependent Claim
120 words
A Ti-Mo alloy consisting essentially of 0.2 to 3.0 wt % of molybdenum, with the balance being substantially titanium, characterized in that the amount of Fe in the impurities is not greater than 0.1% and the amount of O 2 in the impurities is in the range that satisfies the following equation on the basis of the amount of Mo (%). O.sub.2 (%)≦9/35-1/28·Mo (%) said titanium alloy having been heated at a temperature higher than 700° C. and lower than the β-transformation point and then cooled at a rate of 500° C./min or less whereby an alloy is obtained highly reistant to pitting corrosion in an environment where there are bromide ions and which is malleable and superior in formability.
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) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |