Copper wire rod and magnet wire

Patent metadata

Field	Value
Publication number	US-9679676-B2
Application number	US-201314419398-A
Country	US
Kind code	B2
Filing date	Aug 29, 2013
Priority date	Aug 31, 2012
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

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° 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.

First claim

The invention claimed is:

1. A copper wire rod produced by continuous casting and rolling, the copper wire rod made of 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 Cu balance and inevitable impurities, wherein
when a heat treatment is performed on the copper wire rod at 500° C. for 30 minutes in vacuum, the concentration of the H (hydrogen) becomes 0.2 ppm by mass or less,
an electrical conductivity of the copper wire rod is 100% IACS or more, and
crystals, <111> orientations of which are oriented within a range of ±10° with respect to a drawing direction of the copper wire, are 30% or less of all crystals in a cross-section perpendicular to the drawing direction of the copper wire, the copper wire rod being fully softened by annealing after cold working with cross-section reduction rate of 20% or more.

2. The copper wire rod according to claim 1 , wherein crystals, <100> orientations of which are oriented within a range of ±10° with respect to the drawing direction of the copper wire, is 10% or more of all crystals; and crystals, <111> orientations or <112> orientations of which are oriented within a range of ±10° with respect to the drawing direction, are 30% or less of the all crystals.

3. A magnet wire comprising:
a drawn wire material produced by using the copper wire rod according to claim 1 ; and
an insulating film coating an outer peripheral of the drawn wire material.

Assignees

• Mitsubishi Materials Corp

Inventors

• Koide Masato
• WATANABE Eiho

Classifications

• C22C9/00 Primary

  Alloys based on copper · CPC title

• B22D11/1206

  for plastic shaping of strands (rolling mills B21B1/46) · CPC title

• B21C1/02

  Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums · CPC title

• C22F1/00 Primary

  Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working (apparatus for mechanical working of metal B21, B23, B24) · CPC title

• H01B7/00 Primary

  Insulated conductors or cables characterised by their form · CPC title