Kabushiki Kaisha Kobe Seiko Sho

Yasuhiro Hosogi

Toshiaki Yutori

Takehiko Kato

Masatoshi Sudo

Masaaki Katsumata

High strength low carbon steel wire rods excellent in the cold drawing property have a composite structure in which an acicular low temperature transformation phase comprising a martensite, bainite and/or the mixed structure thereof that comprises, by weight %,

High strength low carbon steel wire rods and method of producing them

High strength low carbon steel wire rods

High strength low carbon steels having good ultraworkability which comprises 0.01-0.3 wt % of C, below 1.5 wt % of Si, 0.3-2.5 wt % of Mn and the balance of iron and inevitable impurities. In the steel, a low temperature transformation product phase consisting of acicular martensite, bainite or a mixed structure thereof is uniformly dispersed in a ferrite phase in an amount by volume of 15-40%. Wire articles of these steels and methods for making the steels are also disclosed.

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Hyogo, Japan

Yasuhiro Hosogi