AUSTENITIC STAINLESS STEEL HAVING EXCELLENT HOT WORKABILITY AND CORROSION RESISTANCE AND METHOD OF MANUFACTURING THE SAME

Disclosed are an austenitic stainless steel having excellent hot workability and corrosion resistance, and a manufacturing method thereof. According to one embodiment of the present invention, the austenitic stainless steel comprises: 0.05 weight percent or less of C; 1.0 to 2.0 weight percent or le...

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Bibliographische Detailangaben
1. Verfasser:	RYU, HAN JIN
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ALLOYS CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL 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:	Disclosed are an austenitic stainless steel having excellent hot workability and corrosion resistance, and a manufacturing method thereof. According to one embodiment of the present invention, the austenitic stainless steel comprises: 0.05 weight percent or less of C; 1.0 to 2.0 weight percent or less of Si; 1.0 weight percent or less of Mn (excluding 0 weight percent); 5.0 to 9.0 weight percent of Ni; 15.0 to 18.0 weight percent of Cr; 0.05 weight percent or less of N; 2.0 to 5.0 weight percent of Cu; 0.5 to 2.0 weight percent of Mo; 0.05 to 0.5 weight percent of Sn; 0.5 to 1.0 weight percent of W; and the remainder being Fe and unavoidable impurities, wherein an sulfuric acid atmosphere corrosion resistance index (SCI), defined as SCI = -Cr + 4Ni + 5(Mo + 0.5W) + 12Cu, is 50 or more. 열간 가공성 및 내식성이 우수한 오스테나이트계 스테인리스강 및 이의 제조 방법이 개시된다. 본 발명의 일 실시예에 따른 오스테나이트계 스테인리스강은, 중량%로 C: 0.05% 이하, Si: 1.0 내지 2.0% 이하, Mn: 1.0% 이하(0 제외), Ni: 5.0 내지 9.0%, Cr: 15.0 내지 18.0%, N: 0.05% 이하, Cu: 2.0 내지 5.0%, Mo: 0.5 내지 2.0%, Sn: 0.05 내지 0.5%, W: 0.5 내지 1.0%, 잔부 Fe 및 기타 불가피한 불순물을 포함하며, 하기 식 (1)로 정의되는 SCI(내황산부식지수)가 50 이상이다. SCI = -Cr+4Ni+5(Mo+0.5W)+12Cu --- 식 (1)