C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
75/117, 148/34.6
C21D 8/06 (2006.01) C21D 9/52 (2006.01) C22C 38/04 (2006.01) C22C 38/18 (2006.01)
Patent
CA 1280915
(Abstract) Wire rods containing an adequate quantity of C within the range from 0.70 to 1.00%, Si from 0.5 to 3.0%, Mn from 0.30 to 2.0%, Cr from 0.10 to 0.5%, Al from 0.030 to 0.10% and N from 0.004 to 0.015% and unavoidable impurities, and with Fe for all the rest are subjected to re-heat patenting to increase the tensile strength to 135 kgf/mm2 or higher, then are drawn by adequately slecting the conditions, number of times of drawing in the range from 7 to 16 times, drawing speed from 50 to 500m/minute, extent of drawing from 70 - 90, and water cooling immediately after each drawing to manufacture steel wires of high strength and high toughness. The wires are used as PC wires, steel wires for skewed bridge cables, steel stranded wires, spring wires, main cable wires for extra-long suspension bridge large diameter wires for core of aluminium cables steel reinforced (transmission cable), and as galvanized steel wires for such applications.
504352
Fujiwara Tadayoshi
Hamada Kazuichi
Kawaguchi Yasunobu
Oki Yasuhiro
Takahashi Hiroyuki
Riches Mckenzie & Herbert Llp
Shinko Kosen Kogyo Kabushiki Kaisha
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