LONGITUDINALLY CUTTING METHOD FOR CONTINUOUSLY CAST SLAB OF ELECTROMAGNETIC STEEL

• Main Authors: HONJIYOU OSAMU, MOCHINAGA KISHIO, OKAMOTO AKIFUMI, FUJIWARA KOUICHI
• Format: Patent
• Language: English
• Published: 16.02.1983
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MACHINE TOOLS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; POWDER METALLURGY; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

PURPOSE:To prevent the breakage of a continuously cast slab of electromagnetic steel which contains prescribed contents of Si, Al, P and is heat-treated under prescribed conditions and the rough edges of the hot coil produced from said slab by cutting said slab longitudinally at prescribed temp. CONSTITUTION:The continuously cast slab of electromagnetic steel contg. >=0.8% Si+Al+P produced by a continuously casting method is charged into a heating furnace before its temp. does not drop down to <100 deg.C whereby the slab is heated. The heated slab is cut longitudinally at >=350 deg.C. Or said slab is slowly cooled from >=600 deg.C down to 200 deg.C at <=20 deg.C/hr cooling rate and is cut longitudinally at >=300 deg.C.