TYRE BEAD WIRE AND PROCESS FOR PRODUCTION THEREOF

WIPO Patent Application WO/2010/140521

A1

Provided is a tyre bead wire which can be produced by using a carbon steel wire rod having a diameter equivalent to that of a general-purpose steel wire rod and a carbon content of 0.61 to 0.65wt% and drawing the carbon steel wire rod in one step to a predetermined final diameter suitable for a tyre bead wire. Also provided is a process for the production of the same. In order to obtain the tyre bead wire, a carbon steel wire rod having a carbon content of 0.61 to 0.65wt% and a diameter of 5.5 to 6.5mm is drawn by one drawing operation to a predetermined final diameter with the true strain within a range of 2.0 to 4.0. The resulting tyre bead wire has a pearlite structure wherein ferrite layers and cementite layers are arranged in parallel at narrow intervals.

KAWASHIMA Masatomo (60, Hirakata 13-chome, Fukujucho, Hashima-sh, Gifu 57, 〒5016257, JP)
川嶋　正智 (〒57 岐阜県羽島市福寿町平方１３丁目６０番地　不二商事株式会社内 Gifu, 〒5016257, JP)

JP2010/058916

December 09, 2010

May 26, 2010

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FUJI SHOJI CO.,LTD. (60 Hirakata 13-chome, Fukujucho Hashima-sh, Gifu 57, 〒5016257, JP)
不二商事　株式会社 (〒57 岐阜県羽島市福寿町平方１３丁目６０番地 Gifu, 〒5016257, JP)
KAWASHIMA Masatomo (60, Hirakata 13-chome, Fukujucho, Hashima-sh, Gifu 57, 〒5016257, JP)

C22C38/00; B21C1/00; B29D30/48; B60C15/04; C21D7/02

KOBAYASHI Osamu (KAWASHIMA Bldg. 2nd Floor, 19-13 Kanayamacho 1-chome, Atsuta-ku, Nagoya-sh, Aichi 02, 〒4560002, JP)

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