US3901743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing for the high strength alpha-beta titanium alloys
Assignee: RTX Corp
•
Filing: 1973-10-12
•
Granted: 1975-08-26
•
Expires: 1993-10-12
Abstract
Abstract A process for improving the toughness and property uniformity of the high strength alpha-beta titanium alloys by a specific heat treatment schedule which includes a duplex solution heat treatment prior to aging.
Inventors
- 👤 Robert A Sprague
- 👤 Robert J Henricks
- 👤 Duane L Ruckle
- 👤 Cyril M Pierce
- 👤 James A Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:23
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/16; C22F1/18; C22F1/183
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
128 words
THE METHOD OF PROVIDING IMPROVED TOUGHNESS TO ALLOY FORGINGS OF NOMINAL COMPOSITIONS CONSISTING ESSENTIALLY OF, BY WEIGHT, 6 PERCENT ALUMINUM, 2 PERCENT TIN, 4 PERCENT ZIRCONIUM, 6 PERCENT MOLYBDENUM, BALANCE TITANIUM, THE FORGINGS INCLUDING PORTIONS OF VARYING THICKNESS WHICH COMPRISES: SOLUTION HEAT TREATING THE FORGINGS AT A TEMPERATURE OR 1600*-1700*F. FOR A MINIUM OF ABOUT 1 HOUR, DEVELOPING IN THE ALLOY ABOUT 5-30 VOLUME PERCENT OF A GLOBULAR ALPHA PHASE: QUENCHING THE FORGING AT A RATE IN EXCESS OF AIR COOLING TO AMBIENT TEMPERATURE: REHEATING THE FORGINGS TO A TEMPERATURE OF ABOUT 1400*-1600*F. FOR 1-24 HOURS, PROVIDING GROWTH OF AN ACICULAR ALPHA PHASE THEREIN FOR IMPROVED TOUGHNESS: AND, AFTER COOLING, AGING THE ALLOY AT A TEMPERATURE OF ABOUT 950*-1100*F. FOR AT LEAST ABOUT 2-8 HOURS FOR IMPROVED STRENGTH.
Claim 2
Independent Claim
128 words
THE METHOD OF PROVIDING IMPROVED TOUGHNESS TO ALLOY FORGINGS OF NOMINAL COMPOSITIONS CONSISTING ESSENTIALLY OF, BY WEIGHT, 6 PERCENT ALUMINUM, 2 PERCENT TIN, 4 PERCENT ZIRCONIUM, 6 PERCENT MOLYBDENUM, BALANCE TITANIUM, THE FORGINGS INCLUDING PORTIONS OF VARYING THICKNESS WHICH COMPRISES: SOLUTION HEAT TREATING THE FORGINGS AT A TEMPERATURE OR 1600*-1700*F. FOR A MINIUM OF ABOUT 1 HOUR, DEVELOPING IN THE ALLOY ABOUT 5-30 VOLUME PERCENT OF A GLOBULAR ALPHA PHASE: QUENCHING THE FORGING AT A RATE IN EXCESS OF AIR COOLING TO AMBIENT TEMPERATURE: REHEATING THE FORGINGS TO A TEMPERATURE OF ABOUT 1400*-1600*F. FOR 1-24 HOURS, PROVIDING GROWTH OF AN ACICULAR ALPHA PHASE THEREIN FOR IMPROVED TOUGHNESS: AND, AFTER COOLING, AGING THE ALLOY AT A TEMPERATURE OF ABOUT 950*-1100*F. FOR AT LEAST ABOUT 2-8 HOURS FOR IMPROVED STRENGTH.
Claim 3
Independent Claim
105 words
The method of improving the toughness of alloy forgings of a nominal composition consisting essentially of, by weight, 6 percent aluminum, 2 percent tin, 4 percent zirconium, 6 percent molybdenum, balance titanium, the forgings including portions of varying thickness which comprises: solution heat treating the forgings at about 1690*F. for 1-4 hours; quenching the forging aT a rate in excess of air cooling to room temperature; reheating the forging to a temperature of about 1525*F. for 1-24 hours, the time being selected to provide the desired degree of toughness; and, after cooling, the forging, aging at a temperature of about 1100*F. for about 2-8 hours.
Claim 4
Independent Claim
105 words
The method of improving the toughness of alloy forgings of a nominal composition consisting essentially of, by weight, 6 percent aluminum, 2 percent tin, 4 percent zirconium, 6 percent molybdenum, balance titanium, the forgings including portions of varying thickness which comprises: solution heat treating the forgings at about 1690*F. for 1-4 hours; quenching the forging aT a rate in excess of air cooling to room temperature; reheating the forging to a temperature of about 1525*F. for 1-24 hours, the time being selected to provide the desired degree of toughness; and, after cooling, the forging, aging at a temperature of about 1100*F. for about 2-8 hours.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |