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Title:
STEEL WIRE AND METHOD OF MANUFACTURING THE SAME
Document Type and Number:
WIPO Patent Application WO/1998/053134
Kind Code:
A1
Abstract:
A steel wire, 0.10-0.40 mm in diameter, obtained by subjecting a high-carbon (0.70-0.90 wt.%) steel wire material to heat treatment and wire drawing, wherein its tensile strength and test values of special repeated torsional tests satisfy a predetermined relation; and a method of manufacturing the same. A high strength steel wire which has so high a ductility as to substantially prevent the wire from being broken even during wire twisting, and which rarely encounters a decrease in the ductility even after the wire has been subjected to age hardening by heating, is obtained, and a method of manufacturing the same is economical.

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Inventors:
Kaneko, Yoshikazu (Kuroiso Plant, Bridgestone Corporation 800, Shimonakan, Kuroiso-shi Tochigi, 329-3146, JP)
Obana, Naohiko (Kuroiso Plant, Bridgestone Corporation 800, Shimonakan, Kuroiso-shi Tochigi, 329-3146, JP)
Fujita, Masuhiro (Kuroiso Plant, Bridgestone Corporation 800, Shimonakan, Kuroiso-shi Tochigi, 329-3146, JP)
Masubuchi, Hideki (Kuroiso Plant, Bridgestone Corporation 800, Shimonakan, Kuroiso-shi Tochigi, 329-3146, JP)
Kobayashi, Toshiyuki (Kuroiso Plant, Bridgestone Corporation 800, Shimonakan, Kuroiso-shi Tochigi, 329-3146, JP)
Application Number:
PCT/JP1998/002198
Publication Date:
November 26, 1998
Filing Date:
May 20, 1998
Export Citation:
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Assignee:
BRIDGESTONE CORPORATION (10-1, Kyobashi 1-chome Chuo-ku, Tokyo, 104-0031, JP)
Kaneko, Yoshikazu (Kuroiso Plant, Bridgestone Corporation 800, Shimonakan, Kuroiso-shi Tochigi, 329-3146, JP)
Obana, Naohiko (Kuroiso Plant, Bridgestone Corporation 800, Shimonakan, Kuroiso-shi Tochigi, 329-3146, JP)
Fujita, Masuhiro (Kuroiso Plant, Bridgestone Corporation 800, Shimonakan, Kuroiso-shi Tochigi, 329-3146, JP)
Masubuchi, Hideki (Kuroiso Plant, Bridgestone Corporation 800, Shimonakan, Kuroiso-shi Tochigi, 329-3146, JP)
Kobayashi, Toshiyuki (Kuroiso Plant, Bridgestone Corporation 800, Shimonakan, Kuroiso-shi Tochigi, 329-3146, JP)
International Classes:
D07B1/06; B21C1/00; B21C37/04; B29D30/38; C21D8/06; (IPC1-7): D07B1/06
Attorney, Agent or Firm:
Honda, Ichiro (201 Kanda Chuo Building 2F, 5-7 Nishikanda 2-chom, Chiyoda-ku Tokyo, 101-0065, JP)
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