FERRITIC STAINLESS STEEL SHEET EXHIBITING SMALL INCREASE IN STRENGTH AFTER THERMAL AGING TREATMENT, AND METHOD FOR PRODUCING SAME

A ferritic stainless steel sheet exhibiting small increase in strength after aging heat treatment in the present invention contains, by mass%, C: 0.020% or less, Cr: 10.0% to 25.0%, N: 0.020% or less, Sn: 0.010% to 0.50%, and one or more of Ti: 0.60% or less, Nb: 0.60% or less, V: 0.60% or less, and...

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Bibliographische Detailangaben
Hauptverfasser:	KIMURA KEN, HANSAKI NAOTO, HAMADA JUNICHI, ISHIMARU EIICHIRO, YAMAGISHI AKIHITO
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS 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 MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A ferritic stainless steel sheet exhibiting small increase in strength after aging heat treatment in the present invention contains, by mass%, C: 0.020% or less, Cr: 10.0% to 25.0%, N: 0.020% or less, Sn: 0.010% to 0.50%, and one or more of Ti: 0.60% or less, Nb: 0.60% or less, V: 0.60% or less, and Zr: 0.60% or less so as to satisfy the following Equation (1), in which the difference between stress Ã1 (N/mm 2 ) after prestrain imparting tensile deformation with 7.5% of strain, and upper yield stress Ã2 (N/mm 2 ) when the steel sheet is subjected to heat treatment at 200°C for 30 minutes and then to tension again after the tensile deformation is 8 or less. Ti / 48 + V / 51 + Zr / 91 + Nb / 93 / C / 12 + N / 14 ‰¥ 1.0