METHOD FOR CONTROLLING COILING TEMPERATURE OF HOT ROLLED STEEL STRIP

• Main Authors: KITAO SATOSHI, KOMORI SHIGEYUKI, UEDA TOYOHIKO, ITO NOBUAKI
• Format: Patent
• Language: English
• Published: 28.06.1994
• Edition: 5
• Subjects: AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; 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

PURPOSE:To fix the coiling/cooling speed of a hot rolled strip. CONSTITUTION:To a finish-rolled steel strip, as the finishing outlet temperature 2 is measured at every fixed length from a time when the finishing outlet temperature is detected, regarding a coil piece of every fixed length which already has passed a thermometer 2 at the finishing outlet, the fall of temperature is obtained based on actual results of on-off of a water injection valve of a bank through which this coil piece passes to calculate the present temperature of the coil piece. The target temperature at the outlet of each bank is determined 14 so that the cooling speed of this coil piece becomes constant to a certain bank from that passing time as far as the strip advances the next fixed length.