Title:
HIGH-STRENGTH STEEL PLATE HAVING EXCELLENT FORMABILITY, AND PRODUCTION METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2011/087057
Kind Code:
A1
Abstract:
Disclosed is a high-strength steel plate wherein the Al content (%) and the Si content (%) conform to the relationship delimited by formula (A), and the average value (Ｙave) as defined by formula (B), which relates to the hardness as measured at 100 or more locations by means of a nanoindenter is 40 or higher. Formula (A): 0.3 ≤ 0.7 x [Si] + [Al] ≤ 1.5 Formula (B): Ｙave = Σ(180 x (Xi - 3)-2/n) (Therein, [Al] represents the Al content (%), [Si] represents the Si content (%), n represents the total number of hardness measurement locations, and Xi represents the hardness (GPa) at the i-th measurement location (with i being an integer not greater than n))
Inventors:
NONAKA TOSHIKI (JP)
MATSUTANI NAOKI (JP)
OGAWA TOSHIO (JP)
FUJITA NOBUHIRO (JP)
MATSUTANI NAOKI (JP)
OGAWA TOSHIO (JP)
FUJITA NOBUHIRO (JP)
Application Number:
PCT/JP2011/050440
Publication Date:
July 21, 2011
Filing Date:
January 13, 2011
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
NONAKA TOSHIKI (JP)
MATSUTANI NAOKI (JP)
OGAWA TOSHIO (JP)
FUJITA NOBUHIRO (JP)
NONAKA TOSHIKI (JP)
MATSUTANI NAOKI (JP)
OGAWA TOSHIO (JP)
FUJITA NOBUHIRO (JP)
International Classes:
C22C38/00; B21B3/00; C21D9/46; C22C38/06; C22C38/38; C23C2/06; C23C2/40
Foreign References:
| JP2003313636A | 2003-11-06 | |||
| JP2008056993A | 2008-03-13 | |||
| JPS61157625A | 1986-07-17 | |||
| JPH10130776A | 1998-05-19 | |||
| JPS57155329A | 1982-09-25 | |||
| JP2001355043A | 2001-12-25 | |||
| JP2007302918A | 2007-11-22 | |||
| JP2008063604A | 2008-03-21 |
Other References:
See also references of EP 2524972A4
Attorney, Agent or Firm:
KOKUBUN, Takayoshi (JP)
Takayoshi Kokubu (JP)
Takayoshi Kokubu (JP)
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Claims: