METHOD FOR PRODUCING A ULTRA HIGH STRENGTH COATED OR NOT COATED STEEL SHEET AND OBTAINED SHEET

• Main Authors: PANAHI DAMON, GIRINA OLGA A
• Format: Patent
• Language: English; Korean
• Published: 08.03.2017
• 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

인장 강도 ≥1470 MPa 및 총 연신율 (TE) ≥19% 를 갖는 냉간 압연된 강 시트를 제조하기 위한 방법으로서, 상기 방법은 어닐링 온도 (AT) ≥Ac3 에서 비처리된 강 시트를 어닐링하는 단계로서, 상기 강의 화학적 조성은 중량 % 로: 0.34 % ≤C ≤0.40 %, 1.50 % ≤Mn ≤2.30 %, 1.50 ≤Si ≤2.40%, 0 % < Cr ≤0.7%, 0 % ≤Mo ≤0.3 %, 0.01 % ≤Al ≤0.07 % 를 포함하고, 잔부는 Fe 및 불가피 불순물들인, 상기 비처리된 강 시트를 어닐링하는 단계,...