STEEL SHEET AND METHOD FOR PRODUCING SAME

• Main Authors: NAKANO, Katsuya, TAKEDA, Kengo
• Format: Patent
• Language: English; French; Japanese
• Published: 06.10.2022
• Subjects: ALLOYS; 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; 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; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

Disclosed, as a steel sheet having excellent energy-absorbing performance during crushing deformation, is a steel sheet having a specific chemical composition and steel structure, in which the steel sheet surface has multiple steps that have a peak-trough difference exceeding 5.0 μm and that are present at intervals of 2.0 mm or less. Est divulguée, sous la forme d'une tôle d'acier ayant une excellente performance d'absorption d'énergie pendant la déformation à l'écrasement, une tôle d'acier ayant une composition chimique spécifique et une structure en acier, dans laquelle la surface de tôle d'acier a de multiples marches qui ont une différence de creux -pic dépassant 5,0 μm et qui sont présentes à des intervalles de 2,0 mm ou moins. 圧潰変形時のエネルギー吸収性に優れる鋼板として、所定の化学組成及び鋼組織を有する鋼板であって、板表面において５．０μｍ超の高低差を有する段差が２．０ｍｍ以下の間隔で複数存在する鋼板を開示する。