Hot rolling method and apparatus.

摘要

A hot rolling method, wherein portions of a hot-rolled steel material having suffered a temperature fall below Ar₃ transformation temperature thereof during hot rolling are subjected to an intermediate heating to have a temperature not less than Ac₃ transformation temperature before the steel material is finally finish-­hot-rolled, whereby a resultant hot-rolled product can have a superior uniform structure without duplex structure, and apparatus for effecting the method.