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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9598750 B1

PDFFull Text
Date of Patent:
Mar. 21, 2017

Filed:

Oct. 25, 2011

High cr ferritic/martensitic steels having an improved creep resistance for in-core component materials in nuclear reactor, and preparation method thereof

Applicants:

Sung Ho Kim, Daejeon, KR;

Jong Hyuk Baek, Daejeon, KR;

Tae Kyu Kim, Daejeon, KR;

Woo Gon Kim, Daejeon, KR;

Jun Hwan Kim, Daejeon, KR;

Chang Hee Han, Daejeon, KR;

Chan Bock Lee, Daejeon, KR;

Yeong-il Kim, Daejeon, KR;

Dohee Hahn, Daejeon, KR;

Inventors:

Sung Ho Kim, Daejeon, KR;

Jong Hyuk Baek, Daejeon, KR;

Tae Kyu Kim, Daejeon, KR;

Woo Gon Kim, Daejeon, KR;

Jun Hwan Kim, Daejeon, KR;

Chang Hee Han, Daejeon, KR;

Chan Bock Lee, Daejeon, KR;

Yeong-Il Kim, Daejeon, KR;

Dohee Hahn, Daejeon, KR;

Assignees:

KOREA ATOMIC ENERGY RESEARCH INSTITUTE, Daejeon, KR;

KOREA HYDRO AND NUCLEAR POWER CO., LTD, Seoul, KR;

Attorney:

Maier & Maier, PLLC

Primary Examiner:

Brian Walck

Int. Cl.
CPC ...
C22C 38/02 (2006.01); C22C 38/00 (2006.01); C21D 6/00 (2006.01); C22C 1/02 (2006.01); C22C 38/04 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/54 (2006.01); G21C 1/02 (2006.01); G21C 3/07 (2006.01);
U.S. Cl.
CPC ...
C22C 38/001 (2013.01); C21D 6/002 (2013.01); C22C 1/02 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/54 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01); G21C 1/02 (2013.01); G21C 3/07 (2013.01);
Abstract

Disclosed herein is a high Cr Ferritic/Martensitic steel comprising 0.04 to 0.13% by weight of carbon, 0.03 to 0.07% by weight of silicon, 0.40 to 0.50% by weight of manganese, 0.40 to 0.50% by weight of nickel, 8.5 to 9.5% by weight of chromium, 0.45 to 0.55% by weight of molybdenum, 0.10 to 0.25% by weight of vanadium, 0.02 to 0.10% by weight of tantalum, 0.21 to 0.25% by weight of niobium, 1.5 to 3.0% by weight of tungsten, 0.015 to 0.025% by weight of nitrogen, 0.01 to 0.02% by weight of boron and iron balance. By regulating the contents of alloying elements such as nitrogen, born, the high Cr Ferritic/Martensitic steel with superior tensile strength and creep resistance is provided, and can be effectively used as an in-core component material for sodium-cooled fast reactor (SFR).

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