METHOD FOR PREVENTING SURFACE FLAW OF HOT ROLLED FERRITIC STAINLESS STEEL STRIP

PROBLEM TO BE SOLVED: To provent the occurrence of fine surface flaw at the surface of a hot rolled strip of ferritic stainless steel and to obtain a ferritic stainless steel minimal in surface flaw. SOLUTION: After 2.5-15% working strain is applied to a slab of ferritic stainless steel at 300-900 d...

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Bibliographische Detailangaben
Hauptverfasser:	TSUCHINAGA MASAMITSU, SUMITOMO HIDEHIKO, KURE YUKIHIRO, ABE SEISABURO, YAMAJI KIYOSHI
Format:	Patent
Sprache:	eng
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:	PROBLEM TO BE SOLVED: To provent the occurrence of fine surface flaw at the surface of a hot rolled strip of ferritic stainless steel and to obtain a ferritic stainless steel minimal in surface flaw. SOLUTION: After 2.5-15% working strain is applied to a slab of ferritic stainless steel at 300-900 deg.C, the slab is heated to 1100-1300 deg.C to regulate the crystalline grain size in the surface layer part of the slab before hot rolling to