High-strength hot-rolled steel sheet

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United States of America Patent

PATENT NO 9689060
APP PUB NO 20140161659A1
SERIAL NO

14237286

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Abstract

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This high-strength hot-rolled steel plate contains specific amounts of C, Si, Mn, Al, V and also Ti and/or Nb so as to fulfill C−12(V/51+Ti/48+Nb/93)>0.03, and the rest consists of iron and unavoidable impurities. Ferrite is the main microstructure, the remaining microstructure is one or more selected from the group consisting of bainite, martensite and retained austenite, wherein the average particle diameter of precipitated carbides (the total content of V, Ti and Nb is 0.02% or greater) in the ferrite is less than 6 nm.

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Patent Owner(s)

  • KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.);KOBE STEEL, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hata, Hideo Kobe, JP 75 821
Kinefuchi, Masao Kobe, JP 14 148
Murakami, Toshio Kobe, JP 96 1022

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