Title:
THICK STEEL PLATE HAVING EXCELLENT CRYOGENIC TOUGHNESS
Document Type and Number:
WIPO Patent Application WO/2014/092129
Kind Code:
A1
Abstract:
This thick steel sheet contains prescribed steel components, the Di value composed of the steel components is 2.5 or greater, the residual austenite phase (residual (γ)) remaining at -196°C is 2.0 to 12.0% by volume fraction, and the residual (γ) stability parameter composed of the components contained in the residual austenite at -196°C satisfies the condition of 3.1 or greater.
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Inventors:
IBANO AKIRA
NAKO HIDENORI
NAKO HIDENORI
Application Number:
PCT/JP2013/083239
Publication Date:
June 19, 2014
Filing Date:
December 11, 2013
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C22C38/00; C21D6/00; C22C38/58; C21D8/02
Domestic Patent References:
| WO2012067474A2 | 2012-05-24 | |||
| WO2007080646A1 | 2007-07-19 | |||
| WO2007034576A1 | 2007-03-29 |
Foreign References:
| JP2013234381A | 2013-11-21 | |||
| JP2013213273A | 2013-10-17 | |||
| JP2013014812A | 2013-01-24 | |||
| JP2011219849A | 2011-11-04 | |||
| JP2011219848A | 2011-11-04 | |||
| JP2003129134A | 2003-05-08 | |||
| JPS49135813A | 1974-12-27 | |||
| JPS5113308A | 1976-02-02 | |||
| JP2011241419A | 2011-12-01 |
Other References:
See also references of EP 2933347A4
YANO ET AL.: "Effects of ferrite-austenite two-phase region heat treatment of 6% Ni steel on low-temperature toughness", TETSU-TO-HAGANE (IN JAPANESE), THE 59TH YEAR, vol. 6, 1973, pages 752 - 763
FURUYA ET AL.: "Development of 6% Ni steel for LNG tanks", CAMP-ISIJ, vol. 23, 2010, pages 1322
H. MEHRER, DIFFUSION IN SOLID METALS AND ALLOYS, 1990
"Cryogenic-Temperature Impact Test of Austenitic Stainless Cast Steel", JOURNAL OF THE HIGH PRESSURE GAS SAFETY INSTITUTE OF JAPAN, vol. 24, pages 181
YANO ET AL.: "Effects of ferrite-austenite two-phase region heat treatment of 6% Ni steel on low-temperature toughness", TETSU-TO-HAGANE (IN JAPANESE), THE 59TH YEAR, vol. 6, 1973, pages 752 - 763
FURUYA ET AL.: "Development of 6% Ni steel for LNG tanks", CAMP-ISIJ, vol. 23, 2010, pages 1322
H. MEHRER, DIFFUSION IN SOLID METALS AND ALLOYS, 1990
"Cryogenic-Temperature Impact Test of Austenitic Stainless Cast Steel", JOURNAL OF THE HIGH PRESSURE GAS SAFETY INSTITUTE OF JAPAN, vol. 24, pages 181
Attorney, Agent or Firm:
HAMADA Yuriko et al. (JP)
Yuriko Hamada (JP)
Yuriko Hamada (JP)
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