US3670401A
Expired / Lapsed
US
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Method of fabricating aluminum alloy rod
Assignee: Southwire Co LLC
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Filing: 1970-04-01
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Granted: 1972-06-20
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Expires: 1990-04-01
Abstract
Abstract An aluminum alloy wire having an electrical conductivity of at least 61 percent based on the International Annealed Copper Standard and unexpected properties of increased ultimate elongation, bendability and fatigue resistance when compared to conventional aluminum alloy wire of the same tensile strength. The aluminum alloy wire contains substantially evenly distributed iron aluminate inclusions in a concentration produced by the addition of more than about 0.30 weight percent iron to an alloy mass containing less than about 99.70 weight percent aluminum, no more than 0.15 weight percent silicon, and trace quantities of conventional impurities normally found within a commercial aluminum alloy. The substantially evenly distributed iron aluminate inclusions are obtained by continuously casting an alloy consisting essentially of less than about 99.70 weight percent aluminum, more than 0.30 weight percent iron, no more than 0.15 weight percent silicon and trace quantities of typical impurities to form a continuous aluminum alloy bar, hot-working the bar substantially immediately after casting in substantially that condition in which the bar is cast to form continuous rod which is subsequently drawn into wire without intermediate anneals and annealed after the final draw. After annealing, the wire has the aforementioned novel and unexpected properties of increased ultimate elongation, electrical conductivity of at least 61 percent of the International Annealed Copper Standard, and increased bendability and fatigue resistance.
Inventors
- 👤 Roger J Schoerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:34
CPC Classifications
C; C22; C22C; C22C21/00; B; B22; B22D; B22D11/00; B22D11/06; B22D11/0602; C22F; C22F1/00; C22F1/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49991
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
Process of claim 1 wherein step (a) comprises alloying from about 98.95 to about 99.44 weight percent aluminum, about 0.55 to about 0.95 weight percent iron, from about 0.01 to about 0.15 weight percent silicon, and less than 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, zinc, boron and titanium.
Claim 2
Dependent Claim
30 words
Process of claim 1 wherein the individual trace element content is from 0.0001 to 0.05 weight percent and the total trace element content is from 0.004 to 0.15 weight percent.
Claim 3
Dependent Claim
16 words
Process of claim 1 wherein step (e) comprises batch annealing or batch partially annealing the wire.
Claim 4
Dependent Claim
137 words
Process for preparing an aluminum alloy wire having an electrical conductivity of at least 61 percent IACS comprising the steps of: a. Alloying from about 98.95 to about 99.54 weight percent aluminum with about 0.45 to about 0.95 weight percent iron, about 0.01 to about 0.15 weight percent silicon, and from 0.0001 to 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, zinc, boron and titanium, the total trace element content being from 0.004 to 0.15 weight percent. b. Continuously casting the alloy into a continuous bar; c. Continuously rolling the bar in substantially that condition in which it was cast into a bar to form a continuous rod; d. Drawing the rod with no preliminary or intermediate anneals to form wire; and e. Annealing or partially annealing the wire.
Claim 5
Dependent Claim
71 words
Process of claim 20 wherein step (a) comprises alloying from about 98.95 to about 99.44 weight percent aluminum, about 0.55 to about 0.95 weight percent iron, from about 0.01 to about 0.15 weight percent silicon, and from 0.0001 to 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, zinc, boron and titanium, the total trace element content being from 0.004 to 0.15 weight percent.
Claim 6
Dependent Claim
172 words
Process for preparing an aluminum alloy rod comprising the steps of: a. Alloying from about 98.95 to about 99.54 weight percent aluminum, from about 0.45 to about 0.95 weight percent iron, about 0.01 to about 0.15 weight percent silicon, and from 0.0001 to 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, zinc, boron and titanium; the total weight percent of trace elements being from 0.004 to 0.15 weight percent and the ratio of iron to silicon being at least 8:1; b. Casting the alloy into a continuous bar in a moving mold formed by a groove in the periphery of a casting wheel and an endless belt lying adjacent the groove along a portion of the periphery of the wheel; and c. Hot-working the bar substantially immediately after casting while the bar is in substantially that condition as cast by rolling the bar in closed roll passes to obtain a continuous aluminum alloy rod without having been subjected to any preliminary or intermediate anneals.
Claim 7
Dependent Claim
71 words
Process of claim 7 wherein step (a) comprises alloying from about 98.95 to about 99.44 weight percent aluminum, about 0.55 to about 0.95 weight percent iron, from about 0.01 to about 0.15 weight percent silicon, and from 0.0001 to 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, zinc, boron and titanium, the total trace element content being from 0.004 to 0.15 weight percent.
Claim 8
Dependent Claim
159 words
Process for preparing an aluminum alloy wire having an electrical conductivity of at least 61 percent IACS and iron aluminate inclusions with a particle size of less than 2,000 angstrom units comprising the steps of: a. Alloying from about 98.95 to about 99.54 weight percent aluminum, from about 0.45 to about 0.95 weight percent iron, about 0.01 to about 0.15 weight percent silicon, and less than 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, zinc, boron and titanium; the total weight percent of trace elements being no more than 0.15 weight percent and the ratio of iron to silicon being at least 8:1; b. Casting the alloy to form a cast bar; c. Hot-working the bar by rolling the bar in closed roll passes to obtain an aluminum alloy rod; d. Drawing the rod with no preliminary or intermediate anneals to form wire; and e. Annealing or partially annealing the wire.
Claim 9
Dependent Claim
123 words
Process for preparing an aluminum alloy wire having an electrical conductivity of at least 61 percent IACS comprising the steps of: a. Alloying from about 98.95 to less than 99.44 weight percent aluminum with about 0.55 to about 0.95 weight percent iron, about 0.01 to about 0.15 weight percent silicon, and from 0.0001 to 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, zinc, boron and titanium, the total trace element content being from 0.004 to 0.15 weight percent. b. Casting the alloy into a cast bar; c. Hot-rolling the bar to form a rod; d. Drawing the rod with no preliminary or intermediate anneals to form wire; and e. Annealing or partially annealing the wire.
Claim 10
Dependent Claim
135 words
Process for preparing an aluminum alloy rod comprising the steps of: a. Alloying from about 98.95 to about 99.54 weight percent aluminum, from about 0.45 to about 0.95 weight percent iron, about 0.015 to about 0.15 weight percent silicon and from about 0.0001 to 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, zinc, boron, and titanium; the total weight percent of trace elements being from 0.004 to 0.15 weight percent and the ratio of iron content to silicon content being at least 8:1; b. continuous casting the alloy to form a continuous cast bar; and without any preliminary or intermediate anneals initiating hot working the cast bar to form an aluminum alloy rod before the cast bar has cooled to a temperature below its hot working temperature.
Claim 11
Dependent Claim
103 words
Process for preparing an aluminum alloy wire having substantially evenly distributed iron aluminate inclusions of a particle size of less than 2,000 angstrom units and an electrical conductivity of at least 61 percent IACS comprising the steps of: a. Alloying less than about 99.70 weight percent aluminum with more than about 0.30 weight percent iron, no more than about 0.15 weight percent silicon and trace quantities of impurities; b. Casting the alloy into a bar; c. Rolling the bar to form rod; d. Drawing the rod with no preliminary or intermediate anneals to form wire; and e. Annealing or partially annealing the wire.
Claim 12
Dependent Claim
120 words
Process for preparing an aluminum alloy wire having substantially evenly distributed iron aluminate inclusions of a particle size of less than 2,000 angstrom units and an electrical conductivity of at least 61 percent IACS comprising the steps of: a. Alloying less than about 99.70 weight percent aluminum with more than about 0.30 weight percent iron, no more than about 0.15 weight percent silicon and trace quantities of impurities; b. Continuously casting the alloy into a continuous bar; c. Continuously rolling the bar in substantially that condition in which it was cast into a bar to form a continuous rod; d. Drawing the rod with no preliminary or intermediate anneals to form wire; and e. Annealing or partially annealing the wire.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |