Title:
STEEL FOR EARTHQUAKE RESISTANT STRUCTURE, AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
Japanese Patent JP2010215996
Kind Code:
A
Abstract:
To provide a steel for an earthquake resistant structure in which toughness represented by uniform elongation, total elongation and fracture transition temperature is high, and also, their anisotropies are reduced.
The steel has a steel composition comprising, by mass, 0.01 to 0.2% C, 0.01 to 1.0% Si, <0.5% Mn, ≤0.030% P, ≤0.030% S, ≤0.1% Al, 0.1 to 3.0% Cr and 0.001 to 0.030% Ti, and the balance Fe with inevitable impurities, and has a metallic structure where a hard second phase is distributed into a soft ferrite phase at random. Further, preferably, in the hard second phase, the average aspect ratio is ≤5.0 in both of the cross-section in the rolling direction and the cross-section in the direction orthogonal to the rolling direction.
Inventors:
KIMURA TATSUKI
MITAO SHINJI
SHIKAUCHI NOBUO
MITAO SHINJI
SHIKAUCHI NOBUO
Application Number:
JP2009067318A
Publication Date:
September 30, 2010
Filing Date:
March 19, 2009
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
C22C38/00; C21D8/02; C22C38/28; C22C38/50
Domestic Patent References:
| JP2007107072A | 2007-04-26 | |||
| JP2008208406A | 2008-09-11 | |||
| JPH03240918A | 1991-10-28 | |||
| JP2006028628A | 2006-02-02 |
Attorney, Agent or Firm:
Nozomi Watanabe
Haruko Sanwa
Daitaro Shiraki
Haruko Sanwa
Daitaro Shiraki
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