ROLLING METHOD AND APPARATUS OF HOT ROLLED STEEL STRIP

摘要

PROBLEM TO BE SOLVED: To produce a hot rolled steel strip heating the rough bar by uniform temperature widthwise without generating temperature difference between both edge portions and a central portion and having superior shapes and accuracy widthwise when heating the rough bar provided for hot rolled steel strip by a solenoid type induction heating apparatus at an inlet side of a finish rolling mill. SOLUTION: The solenoid type induction heating apparatus 4 heating the rough bar 2 widthwise in its entirety and an edge heater 6 heating both edges of the rough bar 2 are arranged between the rough rolling mill 1 and a finish rolling mill 8. The rough bar 2 at an inlet side of the finish rolling mill 8 is heated so as to be at a uniform temperature in a widthwise direction by means of the solenoid type induction heating apparatus 4 and edge heater 6.