Copper ingot, copper wire material, and method for producing copper ingot

Patent metadata

Field	Value
Publication number	US-10646917-B2
Application number	US-201415120813-A
Country	US
Kind code	B2
Filing date	Nov 28, 2014
Priority date	Mar 14, 2014
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A copper ingot of the present invention which is casted by a belt-caster type continuous casting apparatus includes: 1 ppm by mass or less of carbon; 10 ppm by mass or less of oxygen; 0.8 ppm by mass or less of hydrogen; 15 ppm by mass to 35 ppm by mass of phosphorus; and a balance of Cu and inevitable impurities, and includes inclusions formed of oxides containing carbon, phosphorus, and Cu.

First claim

The invention claimed is:

1. A copper ingot which is casted by a continuous casting rolling apparatus, the copper ingot comprising:
1 ppm by mass or less of carbon;
10 ppm by mass or less of oxygen;
0.8 ppm by mass or less of hydrogen;
15 ppm by mass to 35 ppm by mass of phosphorus; and
a balance of Cu and inevitable impurities,
wherein the copper ingot includes inclusions formed of oxides containing carbon, phosphorus, and Cu,
wherein the electrical conductivity of the copper ingot is 98% IACS or more.

2. A copper wire material which is formed by processing a copper ingot,
wherein the copper ingot which is casted by a continuous casting rolling apparatus, the copper ingot comprising:
1 ppm by mass or less of carbon;
10 ppm by mass or less of oxygen;
0.8 ppm by mass or less of hydrogen;
15 ppm by mass to 35 ppm by mass of phosphorus; and
a balance of Cu and inevitable impurities,
wherein the copper ingot includes inclusions formed of oxides containing carbon, phosphorus, and Cu,

wherein the electrical conductivity of the copper ingot is 98% IACS or more.

3. A method for producing the copper ingot according to claim 1 ,
wherein a ceramic foam filter is installed between a tundish which supplies molten copper to the continuous casting rolling apparatus, and a casting launder which transports molten copper to the tundish, and
wherein the method comprises:
in the casting launder, using carbon powder as a solid reducing agent and setting a molten copper temperature to be in a range of 1085° C. or higher and lower than 1100° C.; and
in the tundish, setting the molten copper temperature to be in a range of 1100° C. to 1150° C. without using a solid reducing agent and adding phosphorus.

4. The copper ingot according to claim 1 , wherein
a diameter of the inclusion is 0.1 μm to 6 μm, and
the inclusions are dispersed with a density of 40 to 2000/mm 2 .

5. The method for producing the copper ingot according to claim 3 ,
wherein a diameter of the inclusion is 0.1 μm to 6 μm, and
the inclusions are dispersed with a density of 40 to 2000/mm 2 .

Assignees

• Mitsubishi Materials Corp

Inventors

• Mori Satoru
• WATANABE Eiho

Classifications

• B22D11/004 Primary

  Copper alloys · CPC title

• B22D11/108

  Feeding additives, powders, or the like · CPC title

• B22D1/007

  Treatment of the fused masses in the supply runners (B22D1/002, B22D1/005 take precedence) · CPC title

• B22D11/144

  with a rotating mould · CPC title

• B21B2003/005

  Copper or its alloys · CPC title