Title:
HIGH-STRENGTH FE-CR-NI-AL MULTIPLEX STAINLESS STEEL AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/074743
Kind Code:
A1
Abstract:
The present invention relates to a high-strength Fe-Cr-Al-Ni multiplex stainless steel and a manufacturing method therefor. The multiplex stainless steel comprises 35 to 67 wt % of iron (Fe), 13 to 30 wt % of chrome (Cr), 15 to 30 wt % of nickel (Ni), and 5 to 15 wt % of aluminum (Al) and has a multiplex structure in which an austenite phase accounting for high ductility, a ferrite phase accounting for high strength, and an NiAl (B2) phase providing both strength and high-temperature steam oxidation resistance, exist in combination. The multiplex stainless steel can secure necessary processability and mechanical toughness even if in a thin state, can maintain integrity as a structural member in a normal operation condition of a light-water reactor thanks to the formation of a chrome oxide film thereon, and can form a stable oxide film including alumina under a high-temperature steam environment, which is plausible in a high-temperature nuclear accident, thereby providing exceptionally improved resistance to serious accidents.
Inventors:
JANG CHANGHEUI (KR)
KIM HYUNMYUNG (KR)
SUBRAMANIAN GOKUL OBULAN (KR)
HEO JIN WOO (KR)
LEE HO JUNG (KR)
HONG SUNGHOON (KR)
KIM CHAEWON (KR)
KIM HYUNMYUNG (KR)
SUBRAMANIAN GOKUL OBULAN (KR)
HEO JIN WOO (KR)
LEE HO JUNG (KR)
HONG SUNGHOON (KR)
KIM CHAEWON (KR)
Application Number:
PCT/KR2017/010276
Publication Date:
April 26, 2018
Filing Date:
September 20, 2017
Export Citation:
Assignee:
KOREA ADVANCED INST SCI & TECH (KR)
International Classes:
C22C38/40; C21D8/00; C22C38/02; C22C38/04; C22C38/06; C22C38/34; C22C38/48; G21C3/07
Foreign References:
| JPH06146011A | 1994-05-27 | |||
| JP5797461B2 | 2015-10-21 | |||
| KR20120137520A | 2012-12-21 | |||
| KR20150100892A | 2015-09-02 | |||
| JPH07310144A | 1995-11-28 |
Attorney, Agent or Firm:
CHUNG HYUN PATENT & LAW FIRM (KR)
Download PDF: