FeCrNiAl High strength FeCrNiAl multiplex stainless steels and method of making

The present invention relates to a high-strength Fe-Cr-Al-Ni multiplex stainless steel and a manufacturing method thereof, and is comprised of: 35-63 wt% of iron (Fe); 15-30 wt% of chromium (Cr); and 6.01-15 wt% of aluminum (Al). By doing so, a multiplex structure in which an austenite phase with ex...

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Bibliographische Detailangaben
Hauptverfasser:	GOKUL OBULAN SUBRAMANIAN, KIM, HYUN MYUNG, JANG, CHANG HEUI, KIM, CHAE WON
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The present invention relates to a high-strength Fe-Cr-Al-Ni multiplex stainless steel and a manufacturing method thereof, and is comprised of: 35-63 wt% of iron (Fe); 15-30 wt% of chromium (Cr); and 6.01-15 wt% of aluminum (Al). By doing so, a multiplex structure in which an austenite phase with excellent ductility, a ferrite phase with excellent strength, and NiAl (B2) phase which provides both strength and high temperature steam oxidation resistance are mixed secures workability and mechanical toughness necessary for thin thickness. In addition, whereby formation of a stable oxide film including alumina in the high temperature water vapor environment is expected under the high temperature nuclear accident, a remarkable improvement in serious accident resistance can be provided. 본 발명은 고강도 Fe-Cr-Al-Ni 멀티플렉스 스테인리스강 및 이의 제조방법에 관한 것으로 철(Fe) 35 내지 63 중량%, 크롬(Cr) 15 내지 30 중량%, 니켈(Ni) 15 내지 30 중량% 및 알루미늄(Al) 6.01 내지 15 중량%를 포함함으로써, 연성이 우수한 오스테나이트상, 강도가 우수한 페라이트상, 및 강도와 고온 수증기 산화저항성을 함께 제공하는 NiAl(B2)상이 혼재하는 멀티플렉스 조직을 형성하여 얇은 두께에도 필수적인 가공성 및 기계적 인성(toughness)을 확보하고, 고온의 원전사고 하에서 예상되는 고온 수증기 환경에서 알루미나를 포함한 안정적인 산화막을 생성하므로 획기적으로 향상된 중대 사고저항성을 제공할 수 있다.