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US3868279A
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High damping copper-manganese-aluminum alloy
Assignee: INT COPPER RESEARCH ASS Inc
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Filing: 1972-11-17
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Granted: 1975-02-25
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Expires: 1992-11-17
Abstract
Abstract An alloy exhibiting high mechanical damping properties consists essentially of 32 to 42 percent by weight manganese, 2 to 4 percent by weight aluminum, and the balance copper. Damping properties are notably enhanced by annealing the cold worked alloy at 1200*F. to 1400*F., quenching, and aging at 400*F. to 900*F. for 1 1/2 to 24 hours.
Inventors
- 👤 Joseph F Nachman
- 👤 Alvin N Hammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:27
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/05; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
A hot and cold workable alloy exhibiting high mechanical damping properties and consisting essentially of 32 to 42 percent by weight manganese 2 to 4 percent by weight aluminum and the balance copper, said alloy being in the heat-treated condition resulting from annealing at a temperature in the range from 1200*F. to 1400*F., quenching to room temperature, aging at a temperature in the range fRom 400*F. to 550* F for a period of time from 12 to 20 hours, then further aging at a temperature in the range from 800 to 900* F for a period of time from 1 1/2 hours to 4 hours, and cooling to room temperature.
Claim 2
Dependent Claim
110 words
A hot and cold workable alloy exhibiting high mechanical damping properties and consisting essentially of 32 to 42 percent by weight manganese 2 to 4 percent by weight aluminum and the balance copper, said alloy being in the heat-treated condition resulting from annealing at a temperature in the range from 1200*F. to 1400*F., quenching to room temperature, aging at a temperature in the range fRom 400*F. to 550* F for a period of time from 12 to 20 hours, then further aging at a temperature in the range from 800 to 900* F for a period of time from 1 1/2 hours to 4 hours, and cooling to room temperature.
Claim 3
Dependent Claim
54 words
An alloy according to claim 1 in the heat-treated condition resulting from annealing at a temperature of approximately 1275*F followed by quenching in water, then aging at about 400*F. for about 16 hours, then further aging it at about 840*F. for about 1 1/2 to 3 hours, and cooling in air to room temperature.
Claim 4
Independent Claim
109 words
THE METHOD OF INCREASING THE MECHANICAL DAMPING PROPERTIES OF AN ALLOY CONSISTING ESSENTIALLY OF 32 TO 42 PERCENT BY WEIGHT MANGANESE, 2 TO 4 PERCENT BY WEIGHT ALUNINUM, AND THE BALANCE COPPER WHICH COMPRISES ANNEALING THE ALLOY AT A TEMPERATURE IN THE RANGE FROM 1200*F TO 1400*F., THEN QUENCHING THE ALLOY TO ROOM TEMPERATURE, THEN REHEATING THE ALLOY TO A TEMPERATURE IN THE RANGE FROM 400*F. TO 550*F FOR A PERIOD OF TIME FROM 12 TO 20 HOURS, THEN FURTHER AGING AT A TEMPERATURE IN THE RANGE FROM 800 TO 900*F. FOR A PERIOD OF TIME FROM 1 1/2 HOURS TO 4 HOURS, AND THEN COOLING TO ROOM TEMPERATURE.
Claim 5
Independent Claim
109 words
THE METHOD OF INCREASING THE MECHANICAL DAMPING PROPERTIES OF AN ALLOY CONSISTING ESSENTIALLY OF 32 TO 42 PERCENT BY WEIGHT MANGANESE, 2 TO 4 PERCENT BY WEIGHT ALUNINUM, AND THE BALANCE COPPER WHICH COMPRISES ANNEALING THE ALLOY AT A TEMPERATURE IN THE RANGE FROM 1200*F TO 1400*F., THEN QUENCHING THE ALLOY TO ROOM TEMPERATURE, THEN REHEATING THE ALLOY TO A TEMPERATURE IN THE RANGE FROM 400*F. TO 550*F FOR A PERIOD OF TIME FROM 12 TO 20 HOURS, THEN FURTHER AGING AT A TEMPERATURE IN THE RANGE FROM 800 TO 900*F. FOR A PERIOD OF TIME FROM 1 1/2 HOURS TO 4 HOURS, AND THEN COOLING TO ROOM TEMPERATURE.
Claim 6
Dependent Claim
56 words
The method according to claim 3 which comprises annealing the alloy at a temperature of approximately 1275*F. and quenching it in water, reheating it at a temperature of approximately 400*F. for about 16 hours, then further reheating it at approximately 840*F. for about 1 1/2 to 3 hours, and cooling it in air to room temperature.
References Cited (Backward Citations)
US2165316A
Cited
US3079252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |