REINFORCED COMPOSITE ALUMINUM ALLOY CONDUCTOR CABLE

• US 3,647,939 A
• Filed: 05/15/1970
• Issued: 03/07/1972
• Est. Priority Date: 05/15/1970
• Status: Expired due to Term

• Current Assignee: Southwire Company
• Original Assignee: Roger J. Schoerner
• Inventors: Schoerner, Roger J.
• Primary Examiner(s): Goldberg, E. A.
• Application Number:
  US05/037,726
• Time in Patent Office: 662 Days
• Field of Search: 174/126,128,130,110 29/193
• US Class Current: 174/128.1
• CPC Class Codes: C22C 21/00 Alloys based on aluminium
• CPC Class Codes: D07B 1/147 comprising electric conductors or elements for information transfer D07B1/145 takes precedence
• CPC Class Codes: H01B 1/023 Alloys based on aluminium
• CPC Class Codes: H01B 5/08 Several wires or the like stranded in the form of a rope

Abstract

A multistrand cable for transmission of electrical power including aluminum alloy strands having a minimum electrical conductivity of 61 percent IACS and at least one strand of highstrength material with a maximum conductivity of less than 61 percent IACS.

Claims

2. Multistrand cable of claim 1 wherein the second strand consists essentially of from about 0.80 to about 0.95 weight percent iron;

from about 0.07 to about 0.15 weight percent silicon; and

from about 98.95 to about 99.13 weight percent aluminum.

3. Multistrand cable of claim 1 wherein the second strand consists essentially of from about 0.55 to about 0.80 weight percent iron;

from about 0.01 to about 0.07 weight percent silicon; and

from about 99.15 to about 99.40 weight percent aluminum.

4. Multistrand cable of claim 1 wherein the second strand consists essentially of from about 0.55 to less than 0.60 weight percent iron;

and from about 0.01 to about 0.15 weight percent silicon; and

from about 99.10 to about 99.44 weight percent aluminum.

5. Multistrand cable of claim 1 wherein in the second strand the silicon content is from 0.01 to 0.15 weight percent, 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.

6. Multistrand cable of claim 1 wherein said one strand consisting essentially of high-strength material is selected from the group consisting of strands of steel, aluminum alloy, synthetic fibers and combinations thereof.

7. A multistrand cable for transmission of electrical power having at least two sets of strands, the strands in one set of strands consisting essentially of a high-strength material with a conductivity of less than 61 percent IACS, the strands in the second set of strands having a minimum conductivity of 61 percent IACS and a diameter or greatest perpendicular distance between parallel faces of between 0.460 and 0.0031 inch and consisting essentially of from about 0.55 to about 0.95 weight percent iron;

0.01 to about 0.15 weight percent silicon;

0.0001 to 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, magnesium, zinc, boron, and titanium; and

from about 98.95 to less than 99.45 weight percent aluminum with from 0.004 to 0.15 weight percent trace elements and an iron to silicon ratio of 8;

1 or greater.

8. A multistrand cable for transmission of electrical power having at least two strands, one strand consisting essentially of a high-strength material with a conductivity of less than 61 percent IACS, the second strand being an aluminum alloy and having a minimum conductivity of 61 percent IACS and a diameter or greatest perpendicular distance between parallel faces of between 0.460 and 0.0031 inch and containing substantially evenly distributed iron aluminate inclusions in a concentration produced by the presence of about 0.45 to about 0.95 weight percent iron in an alloy mass consisting essentially of about 98.95 to less than 99.45 weight percent aluminum, 0.01 to about 0.15 weight percent silicon;

and 0.0001 to 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, magnesium, zinc, boron, and titanium, said iron aluminate inclusions haVing a particle size of less than 2,000 angstrom units.

9. Multistrand cable of claim 8 wherein in the second strand iron is present in a concentration of about 0.55 to about 0.95 weight percent;

silicon is present in a concentration of about 0.01 to about 0.15 weight percent; and

aluminum is present in a concentration of about 98.95 to about 99.44 weight percent.

10. Multistrand cable of claim 8 wherein in the second strand iron is present in a concentration of about 0.80 to about 0.95 weight percent;

silicon is present in a concentration of about 0.07 to about 0.15 weight percent; and

aluminum is present in a concentration of about 98.95 to about 99.13 weight percent.

11. Multistrand cable of claim 8 wherein in the second strand iron is present in a concentration of about 0.50 to about 0.80 weight percent;

silicon is present in a concentration of about 0.01 to about 0.07 weight percent;

aluminum is present in a concentration of about 99.15 to about 99.40 weight percent.

12. Multistrand cable of claim 8 wherein in the second strand iron is present in a concentration of about 0.45 to less than 0.60 weight percent;

silicon is present in a concentration of about 0.01 to about 0.15 weight percent; and

aluminum is present in a concentration of about 99.10 to about 99.54 weight percent.

13. Multistrand cable of claim 8 wherein in the second strand iron is present in a concentration of about 0.55 to less than 0.60 weight percent;

silicon is present in a concentration of about 0.01 to about 0.15 weight percent; and

aluminum is present in a concentration of about 99.10 to about 99.44 weight percent.

14. Multistrand cable of claim 8 wherein in the second strand the silicon content is from 0.01 to 0.15 weight percent, the individual trace element content is from 0.0001 to 0.05 and the total trace element content is from 0.004 to 0.15 weight percent.

15. Multistrand cable of claim 8 wherein said one strand consisting essentially of high-strength material is selected from the group consisting of strands of steel, aluminum alloy, synthetic fibers, and combinations thereof.

16. A multistrand cable for transmission of electrical power having at least two sets of strands, the strands of one set of strands consisting essentially of a high-strength material with a conductivity of less than 61 percent IACS, the strands in the second set of strands being an aluminum alloy and having a minimum conductivity of 61 percent IACS and a diameter or greatest perpendicular distance between parallel faces of between 0.460 and 0.0031 inch and containing substantially evenly distributed iron aluminate inclusions in a concentration produced by the presence of about 0.45 to about 0.95 weight percent iron in an alloy mass consisting essentially of about 98.95 to less than 99.45 weight percent aluminum, 0.01 to 0.15 weight percent silicon;

and 0.0001 to 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, magnesium, zinc, boron, and titanium, said iron aluminate inclusions having a particle size of less than 2,000 angstrom units.

17. A multistrand cable for transmission of electrical power having a plurality of high-strength core strands and a plurality of outer conductor strands, said high-strength core strands consisting essentially of an aluminum alloy having up to 0.10 percent by weight copper, up to 0.50 percent by weight iron, up to 0.03 percent by weight manganese, up to 0.10 percent by weight zinc, up to 0.03 percent by weight chromium, up to 0.06 percent by weight boron, about 0.50 to 0.90 percent by weight silicon, about 0.60 to about 0.90 percent by weight magNesium, and the balance aluminum;

said outer conductor strands consisting essentially of an aluminum alloy with a minimum conductivity of 61 percent IACS and containing from about 0.55 to about 0.95 weight percent iron;

0.01 to about 0.15 weight percent silicon;

0.0001 to 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, magnesium, zinc, boron, and titanium; and

from about 98.95 to less than 99.45 weight percent aluminum with from 0.004 to 0.15 weight percent trace elements and an iron to silicon ratio of 8;

1 or greater.

18. A multistrand cable for transmission of electrical power having a plurality of high-strength core strands and a plurality of outer conductor strands, said high-strength core strands consisting essentially of an aluminum alloy having up to 0.10 percent by weight copper, up to 0.50 percent by weight iron, up to 0.03 percent by weight manganese, up to 0.10 percent by weight zinc, up to 0.03 percent by weight chromium, up to 0.06 percent by weight boron, about 0.50 to 0.90 percent by weight silicon, about 0.60 to about 0.90 percent by weight magnesium, and the balance aluminum;

said outer conductor strands consisting essentially of an aluminum alloy with a minimum conductivity of 61 percent IACS and containing substantially evenly distributed iron aluminate inclusions in a concentration produced by the presence of about 0.45 to about 0.95 weight percent iron in an alloy mass consisting essentially of about 98.95 to less than 99.45 weight percent aluminum, 0.01 to about 0.15 weight percent silicon, and 0.0001 to 0.05 weight percent each of trace elements selected from the group consisting of vanadium, copper, manganese, magnesium, zinc, boron, and titanium, said iron aluminate inclusions having a particle size of less than 2,000 angstrom units.