HIGH STRENGTH COLD_ROLLED PLATED STEEL SHEET FOR HOME APPLICANCES HAVING EXCELLENT HOMOGENEOUS MATERIAL PROPERTIES AND METHOD FOR MANUFACTURING THE SAME

• Main Authors: KIM JAE HYUNG, KIM YONGWOO, JEON JEACHUN
• Format: Patent
• Language: English; Korean
• Published: 31.07.2023
• Subjects: ALLOYS; APPARATUS THEREFOR; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; 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; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The present disclosure relates to a cold rolled steel sheet and a manufacturing method thereof. The cold rolled steel sheet includes, in wt%, 0.0005-0.2% of C, 0.05-0.2% of Mn, 0.15% or less (excluding 0) of Si, 0.03% or less (excluding 0) of P, 0.015% or less (excluding 0) of S, 0.01 to 0.05% of Al, 0.01 to 0.1% of Ti, and 0.01% or less (excluding 0) of N. the cold rolled steel sheet of the present invention further includes 0.0001 to 0.35% of the total content of at least one MM component selected from a group consisting of Sn, B, Mo, Ni and Cr, and the remainder of Fe and other inevitable impurities. One aspect of the present invention is to provide the cold rolled and plated steel sheet that has excellent formability and excellent material uniformity in the longitudinal and width directions of the steel sheets, and the manufacturing method thereof. 본 개시는 중량%로, C: 0.0005∼0.2%, Mn: 0.05~0.2%, Si:0.15% 이하(0은 제외), P: 0.03% 이하(0은 제외), S: 0.015% 이하(0은 제외), Al: 0.01~0.05%, Ti: 0.01~0.1%, N: 0.01% 이하(0은 제외)를 포함하고, 추가적으로, Sn, B, Mo, Ni 및 Cr으로 이루어진 그룹에서 선택된 적어도 하나의 MM 성분을 함량의 총합으로 0.0001~0.35% 포함하며, 잔부 Fe 및 기타 불가피한 불순물을 포함하는 냉연강판 및 이의 제조방법에 관한 것이다.