690MPa급 고강도 저항복비 중망간강 중후강 및 제조방법

• Main Authors: CHEN YANTANG, ZHOU YUWEI, SUN CHAO, DUAN DONGMING, WANG CONGDAO, LI MING
• Format: Patent
• Language: Korean
• Published: 04.07.2022
• Subjects: ALLOYS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; 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; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

690MPa급 고강도 저항복비 중망간강 중후강 및 제조방법에 관한 것으로서, 화학 성분 및 질량%로, C: 0.05％~0.10％, Mn: 4.1％~4.7％, Si: 0.15％~0.4％, P≤0.010％, S≤0.003％, Ti: 0.01％~0.05％, Ni+Cr+Mo≤0.6％, 나머지는 Fe 및 불가피한 불순물을 포함하고, 건설기계 분야의 복잡한 환경에서 초고강도강의 안전 성능 및 건설 코스트에 대한 요구를 충족시킬 수 있다. The present disclosure discloses a 690 MPa high-strength medium-manganese steel with low yield ratio and medium thickness and a manufacture method thereof, which relates to the technical field of steel smelting. The 690 MPa high-strength medium-manganese steel with low yield ratio and medium thickness is composed of the following chemical composition in mass percentage: C: 0.05%-0.10%, Mn: 4.1%-4.7%, Si: 0.15%-0.4%, P≤0.010%, S≤0.003%, Ti: 0.01%-0.05%, Ni+Cr+Mo≤0.6%, and the balance of Fe and unavoidable impurities. The steel plate manufactured meets the safety performance and construction cost requirements of the construction machinery on the ultra-high-strength steel in complex environments.