METHOD OF PRODUCING AN OXYGEN-FREE COPPER WIRE MATERIAL BY A CONTINUOUS CAST-ROLLING METHOD USING A ROTATIONAL MOVABLE MOLD

• US 20080196550A1
• Filed: 02/04/2008
• Published: 08/21/2008
• Est. Priority Date: 08/02/2005
• Status: Abandoned Application

• Current Assignee: Furukawa Electric Company Limited
• Original Assignee: Furukawa Electric Company Limited
• Inventors: ABE, Toshio, ANDOU, Masayuki
• Application Number:
  US12/025,560
• Publication Number:
  US 20080196550A1
• Time in Patent Office: Days
• US Class Current: 75/641
• CPC Class Codes: B21B 1/463 in a continuous process, i.e. the cast not being cut before rolling
• CPC Class Codes: B21B 2003/005 Copper or its alloys
• CPC Class Codes: B21B 3/003 Rolling non-ferrous metals immediately subsequent to continuous casting, i.e. in-line rolling
• CPC Class Codes: B22D 1/00 Treatment of fused masses in the ladle or the supply runners before casting for continuous casting B22D11/10; metallurgical processing, e.g. refining of iron or other metal C21, C22, C25C
• CPC Class Codes: B22D 11/004 Copper alloys
• CPC Class Codes: B22D 11/0602 formed by a casting wheel and belt, e.g. Properzi-process
• CPC Class Codes: B22D 11/108 Feeding additives, powders, or the like
• CPC Class Codes: B22D 11/117 by treating with gases B22D11/118, B22D11/119 take precedence
• CPC Class Codes: B22D 11/1206 for plastic shaping of strands rolling mills B21B1/46

Abstract

A method of producing an oxygen-free copper wire material, containing: continuously guiding a molten copper obtained by melting electric copper, into a tundish through a conduit; injecting the molten copper in the tundish, into a rotational movable mold; cooling and solidifying the molten copper, to form an ingot; and continuously drawing the ingot out of the mold, followed by continuous rolling; the method further containing: allowing the molten copper in the conduit to react with a solid reducing agent, under blowing an inert gas thereinto; allowing the molten copper in the tundish to react with a solid reducing agent, under blowing an inert gas thereinto; and adding a phosphorus compound to the molten copper, so that the phosphorus content in the ingot would be from 1 to 10 ppm; and controlling the temperature of the molten copper in the tundish from 1,085 to 1,100° C.

Claims

1-5. -5. (canceled)

5. A method of producing an oxygen-free copper wire material, comprising the steps of:

continuously guiding a molten copper obtained by melting copper material;

allowing the molten copper to react with a solid reducing agent, and blowing an inert gas into the molten copper;

adding a phosphorus compound to the molten copper;

controlling the temperature of the molten copper in the range from 1,085 to 1,100°

C.;

injecting the molten copper into a rotational movable mold;

cooling and solidifying the molten copper to form an ingot whose phosphorus content is in the range from 1 to 10 ppm; and

continuously drawing the ingot out of the mold, followed by subjecting the drawn ingot to continuous rolling, to form a rod.

6. The method of producing an oxygen-free copper wire material according to claim 5, wherein the molten copper is guided into a tundish through a conduit by the step continuously guiding the molten copper obtained by melting copper material.

7. The method of producing an oxygen-free copper wire material according to claim 6, wherein the step of allowing the molten copper to react with a solid reducing agent, and blowing an inert gas into the molten copper, is done in the tundish and/or conduit.

8. The method of producing an oxygen-free copper wire material according to claim 5, wherein the phosphorus compound is added in the step of adding a phosphorus compound to the molten copper, so as to form the ingot whose phosphorus content is in the range from 1 to 10 ppm.

9. The method of producing an oxygen-free copper wire material according to claim 5, wherein the phosphorus compound is added in the step of adding a phosphorus compound to the molten copper, so as to form the ingot whose phosphorus content is in the range from 2 to 8 ppm.

10. The method of producing an oxygen-free copper wire material according to claim 5, wherein the temperature of the molten copper is controlled in the range from 1,085 to 1,095°

C.

11. The method of producing an oxygen-free copper wire material according to claim 5, wherein said rotational movable mold is belt and wheel type.

12. The method of producing an oxygen-free copper wire material according to claim 5, wherein said rotational movable mold is twin belts type.

13. The method of producing an oxygen-free copper wire material according to claim 5, wherein the step of allowing the molten copper to react with a solid reducing agent, is the step that charcoal is allowed to float on the surface of the molten copper.

14. The method of producing an oxygen-free copper wire material according to claim 5, wherein the step of blowing an inert gas into the molten copper is a step that nitrogen gas or argon gas is forcibly blown from the bottom of the molten copper.

15. The method of producing an oxygen-free copper wire material according to claim 5, further comprising

the step of applying the rod to cold-working.

16. An oxygen-free copper wire material produced by the method comprising the steps of:

continuously guiding a molten copper obtained by melting copper material;

allowing the molten copper to react with a solid reducing agent, and blowing an inert gas into the molten copper;

adding a phosphorus compound to the molten copper;

controlling the temperature of the molten copper in the range from 1,085 to 1,100°

C.;

injecting the molten copper into a rotational movable mold;

cooling and solidifying the molten copper to form an ingot whose phosphorus content is in the range from 1 to 10 ppm; and

continuously drawing the ingot out of the mold, followed by subjecting the drawn ingot to continuous rolling, to form a rod.

17. The oxygen-free copper wire material according to claim 16, whose oxygen content is in the range 6 ppm or less.

18. The oxygen-free copper wire material according to claim 16, whose hydrogen content is in the range 0.5 ppm or less.

19. An oxygen-free copper wire material produced by the method comprising the steps of:

continuously guiding a molten copper obtained by melting copper material;

allowing the molten copper to react with a solid reducing agent, and blowing an inert gas into the molten copper;

adding a phosphorus compound to the molten copper;

controlling the temperature of the molten copper in the range from 1,085 to 1,100°

C.;

injecting the molten copper into a rotational movable mold;

cooling and solidifying the molten copper to form an ingot whose phosphorus content is in the range from 1 to 10 ppm;

continuously drawing the ingot out of the mold, followed by subjecting the drawn ingot to continuous rolling, to form a rod; and

the step of applying the rod to cold-working.

20. The oxygen-free copper wire material according to claim 19, whose electric conductivity is 98% or more.