Title:
METHOD OF PRODUCING STEEL WIRE
Document Type and Number:
WIPO Patent Application WO/2010/101154
Kind Code:
A1
Abstract:
Disclosed is a method of producing a steel wire having good tensile strength with little machining energy.
Specifically disclosed is a method of producing a steel wire, comprising a pre-wire drawing step for producing a semi-finished wire rod by drawing a high-carbon steel wire rod containing 0.90-1.20 mass% of carbon, a heat treatment step for producing a heat treated wire rod by carrying out patenting heat treatment on the semi-finished wire rod, and a final wire drawing step for producing a steel wire by drawing the heat treated wire rod, wherein the amount of wire drawing (εf) in the final wire drawing step satisfies the relation represented by the expression: εf=21n(D0/Df)
(in the expression, Df denotes the final diameter of a steel wire obtained in the final wire drawing step, D0 denotes the diameter of the heat treated wire rod prior to the final wire drawing step, and ln denotes natural logarithm), and the amount of wire drawing (εf) in the final wire drawing step is 2.50-3.10.
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Inventors:
ABE Yasuyuki (800 Shimonakano, Nasushiobara-sh, Tochigi 46, 〒3293146, JP)
Application Number:
JP2010/053352
Publication Date:
September 10, 2010
Filing Date:
March 02, 2010
Export Citation:
Assignee:
BRIDGESTONE CORPORATION (10-1, Kyobashi 1-chome Chuo-k, Tokyo 40, 〒1048340, JP)
株式会社ブリヂストン (〒40 東京都中央区京橋１丁目１０番１号 Tokyo, 〒1048340, JP)
株式会社ブリヂストン (〒40 東京都中央区京橋１丁目１０番１号 Tokyo, 〒1048340, JP)
International Classes:
B21C1/00; D07B1/06
Attorney, Agent or Firm:
HONDA Ichiro (HONDA INTERNATIONAL PATENT & TRADEMARK OFFICE, 6th Floor Yusei Fukushi Kotohira Bldg.,14-1, Toranomon 1-chome, Minato-ku, Tokyo 01, 〒1050001, JP)
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