Progress of runout table cooling technology in hot strip mill

With the development of new steel grades,such as dualphase steel,TRIP steel,IF steel and super steel etc.,the interior quality requirement of hot rolled strip is being focused and more attention is given to run-out table cooling.It is necessary not only to guarantee the precision of coil temperature but also to realize cooling rate control and microstructure controlling.In this article,progress of controlled cooling in hot strip mill is described from points of heat transfer technology,mathematical model,controlling strategy and quality ideas.