METHOD OF COOLING COLD-ROLLING ROLL, METHOD OF COLD-ROLLING STEEL SHEET AND SYSTEM FOR COOLING COLD-ROLLING ROLL

摘要

PROBLEM TO BE SOLVED: To prevent the shape of a steel sheet after rolling from disordering and also to prevent clogging of a piping and a nozzle accompanying the cohesion and solidification of scum by stabilizing the properties of emulsion oil 19, 20 which are used in circulation when cold-rolling the steel sheet 1 with circulating lubrication type cold tandem mill 100 and by suppressing the secular change of distribution (profile) of the outline in the direction of the body length of a roll 2 with the growth of thermal crown.;SOLUTION: The fluid point of the emulsion rolling oil 19, 20 is defined as 5C. Preferably, the second emulsion rolling oil 20 is branched from the supply piping 7 of the first emulsion rolling oil 19 and supplied through a cooling means 14. Furthermore preferably, the second emulsion rolling oil 20 is supplied through a control means 13 of iron-powder density.;COPYRIGHT: (C)2009,JPO&INPIT