LNG 저장탱크용 7Ni 강판 및 생산 공정

본 발명은 철강 제련 기술 분야에 관한 것으로, LNG 저장탱크용 7Ni 강판 및 생산 공정을 제공한다. 이의 화학 성분 및 질량 백분율은 C: 0.02%~0.06%, Si: 0.20%~0.35%, Ni: 4.0%~8.0%, Mn: 0.3%~0.7%, P≤0.005%, S≤0.005%, Al: 0.03%~0.05%, Nb: 0.02%~0.05%, Cr: 0.2%~0.4%, 나머지는 Fe 및 불가피한 불순물이다. 강판의 인장 강도는 690~790Mpa, 항복 강도는 590~700MPa, 연신율은 ≥24%이고, -196℃에서의 횡방향...

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG PENGCHENG, LI QINGCHUN, HUANG YIXIN, WU HUIBIN, XIE ZHANGLONG, HUO SONGBO, ZHANG BINGJUN
Format:	Patent
Sprache:	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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Zusammenfassung:	본 발명은 철강 제련 기술 분야에 관한 것으로, LNG 저장탱크용 7Ni 강판 및 생산 공정을 제공한다. 이의 화학 성분 및 질량 백분율은 C: 0.02%~0.06%, Si: 0.20%~0.35%, Ni: 4.0%~8.0%, Mn: 0.3%~0.7%, P≤0.005%, S≤0.005%, Al: 0.03%~0.05%, Nb: 0.02%~0.05%, Cr: 0.2%~0.4%, 나머지는 Fe 및 불가피한 불순물이다. 강판의 인장 강도는 690~790Mpa, 항복 강도는 590~700MPa, 연신율은 ≥24%이고, -196℃에서의 횡방향 충격 에너지는 ≥100J이며, LNG를 저장하고 운송하는 압력용기 제조에 사용할 수 있다. A 7Ni steel plate for an LNG storage tank and a production process, relating to the technical field of steel smelting. The 7Ni steel plate comprises the following chemical components in percentage by mass: 0.02%-0.06% of C, 0.20%-0.35% of Si, 4.0%-8.0% of Ni, 0.3%-0.7% of Mn, less than or equal to 0.005% of P, less than or equal to 0.005% of S, 0.03%-0.05% of Al, 0.02%-0.05% of Nb, 0.2%-0.4% of Cr, and the balance Fe and inevitable impurities. The steel plate has the tensile strength of 690-790 Mpa, the yield strength of 590-700 Mpa, the elongation rate greater than or equal to 24%, and the transverse impact power greater than or equal to 100 J at -196°C, and can be used for manufacturing a pressure container for storing and transporting LNG and the like.