ALUMINUM OR ALUMINUM - ZINC PLATED STEEL SHEET SUITABLE FOR HIGH TEMPERATURE FORMING AND HAVING HIGH STRENGTH AFTER HIGH TEMPERATURE FORMING, AND PRODUCTION METHOD THEREFOR

• Main Authors: FUDA MASAHIRO, MAKI JUN, EGUCHI HARUHIKO, SUEHIRO MASAYOSHI, TAKADA YOSHIHISA, MIYAKOSHI TOSHIHIRO
• Format: Patent
• Language: English
• Published: 19.03.2003
• Edition: 7
• 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; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PROBLEM TO BE SOLVED: To provide an aluminum plated steel sheet or an aluminum - zinc plated steel sheet which is suitable for high temperature forming, and has high strength after high temperature forming, and to provide a production method therefor. SOLUTION: The aluminum plated steel sheet or aluminum - zinc plated steel sheet suitable for high temperature forming and having high strength after high temperature forming has a composition containing, by mass, 0.15 to 0.55% C, <=0.5% Si, 0.2 to 3.0% Mn, <=0.04% S, <=0.1% P and 0.005 to 0.100% Al, and further containing one or more metals selected from <=2.0% Cr and <=1.0% Mo so as to satisfy (Cr+7×Mo)>=0.1.