US3844847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermomechanical processing of mechanically alloyed materials
Assignee: Huntington Alloys Corp
•
Filing: 1973-09-11
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Granted: 1974-10-29
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Expires: 1993-09-11
Abstract
Abstract Flat rolled products are produced from mechanically alloyed composite particles by compaction and hot working using prescribed heat treatments, strain, strain rates, etc.
Inventors
- 👤 M Bomford
- 👤 R Cairns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:06
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
50 words
A PROCESS FOR PRODUCING FLAT MILLPRODUCTS FROM MECHANICALLY ALLOYED COMPOSITE POWDER PARTICLES WHICH COMPRISES COMPACTING THE COMPOSITE PARTICLES ATA TEMPERATURE WITHIN THE RANGE OF ABOUT 1,700*F. TO 2,100*F., HOT ROLLING THE COMPACTED BODY AT A TEMPERATURE ABOVE THE RECRYSTALLIZATION TEMPERATURE OF THE ALLOY BUT BELOW ABOUT 2,050*F. AND AT A
Claim 2
Dependent Claim
50 words
A PROCESS FOR PRODUCING FLAT MILLPRODUCTS FROM MECHANICALLY ALLOYED COMPOSITE POWDER PARTICLES WHICH COMPRISES COMPACTING THE COMPOSITE PARTICLES ATA TEMPERATURE WITHIN THE RANGE OF ABOUT 1,700*F. TO 2,100*F., HOT ROLLING THE COMPACTED BODY AT A TEMPERATURE ABOVE THE RECRYSTALLIZATION TEMPERATURE OF THE ALLOY BUT BELOW ABOUT 2,050*F. AND AT A
Claim 3
Dependent Claim
17 words
A process in accordance with claim 1 in which the compaction temperature is from 1,850* to 2,000*F.
Claim 4
Dependent Claim
19 words
A Process in accordance with claim 1 in which the temperature of hot rolling is from 1,800* to 2,000*F.
Claim 5
Dependent Claim
18 words
A process in accordance with claim 1 in which the strain rate is about 15 to 30 in/in/sec.
Claim 6
Dependent Claim
22 words
A process in accordance with claim 1 in which the percentage reduction in thickness is from about 80 to about 91 percent.
Claim 7
Dependent Claim
75 words
A process in accordance with claim 1 in which if the hot rolling is accomplished unidirectionally, the rolling temperature and strain are correlated such as to represent a point within the curves AB and CD of FIG. 1 of the accompanying drawing and if the hot rolling is conducted in two directions, the rolling temperature and strain are correlated to give a point within the curves EF and GH of FIG. 2 of the drawing.
Claim 8
Dependent Claim
41 words
A process in accordance with claim 2 in which the hot rolling temperature is from 1,800* to 2,000*F., the strain rate is from about 15 to 30 in/in/sec and the percentage reduction in thickness is about 80 to about 91 percent.
Claim 9
Dependent Claim
37 words
A process in accordance with claim 7 in which the product is thereafter heat treated at a temperature from about 2,200*F. to below the incipient melting temperature of the alloy to achieve a coarse elongated grain structure.
References Cited (Backward Citations)
US3776704A
Cited
US3746581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |