Title:
COPPER WIRE AND ITS PRODUCTION METHOD
Document Type and Number:
Japanese Patent JP3858861
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the occurrence of disconnection in cold wire drawing, and to eliminate deterioration in mechanical properties caused by storing after wire drawing and annealing for an extra fine wire.
SOLUTION: Tough pitch copper having an oxygen content of 200 to 400 ppm and a copper purity in a 3N class is used as a base metal. As additional element metal, tin or indium or both of them are incorporated by 5 to <200 ppm into the base metal to form into a copper material for wire drawing. The copper material is wire-drawn and is thereafter annealed. The wire drawing and annealing are performed for several times to form into the copper wire.
Inventors:
Takaro Ichikawa
Masayoshi Aoyama
Kazuhiro Yamada
Tsutomu Takahashi
Nagayama Hidetoshi
Masayoshi Aoyama
Kazuhiro Yamada
Tsutomu Takahashi
Nagayama Hidetoshi
Application Number:
JP2003201077A
Publication Date:
December 20, 2006
Filing Date:
July 24, 2003
Export Citation:
Assignee:
Hitachi Cable Ltd.
International Classes:
B21C1/00; C22C9/02; B21C9/00; C22F1/00; C22F1/08; (IPC1-7): C22C9/02; B21C1/00; B21C9/00; C22F1/08; //C22F1/00
Domestic Patent References:
| JP3718036B2 |
Attorney, Agent or Firm:
Hiroshi Okikawa