Mitsubishi Materials Corporation

Eiho Watanabe

Satoru Mori

Masato Koide

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.

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

A copper wire rod with an excellent surface quality and a magnet wire, in which the occurrence of blister defects is suppressed, are provided. The copper wire rod has a composition consisting of: more than 10 ppm by mass and 30 ppm by mass or less of P; 10 ppm by mass or less of O; 1 ppm by mass or less of H; and the balance Cu and inevitable impurities, wherein hydrogen concentration after performing a heat treatment at 500&#xb0; for 30 minutes in vacuum is 0.2 ppm by mass or less. The magnet wire includes: a drawn wire material produced by using the copper wire rod; and an insulating film coating an outer periphery of the drawn wire material.

Growing community of inventors

Iwaki, Japan

Eiho Watanabe