The head of hot rolling intermediate throb and, the head of continuous casting throb in order to make the posterior cutting quantity decrease and the method of controlling posterior form beforehand

摘要

The present invention relates to a method of pre-controlling the shapes of continuous-casting slab head and tail. A method of pre-controlling the shapes of continuous-casting slab head and tail for reducing the cut amount of the head and tail of the hot rolling intermediate slab, adopts the way of pre-controlling to cut the continuous-casting slab head and tail, that is, cutting the slab into the shape-the end surface of its head concaving inwards and that of its tail projecting outwards. The head and tail of a slab is cut in a curve which is symmetric to the center line in width thereof; the arc height, i.e. the maximum value of the concave amount at the head or that of the projection amount at the tail is controlled within 0mmˆ¼50mm. The present invention can substantially decrease the length of the uneven deforming parts at the head and tail of the intermediate slab, thereby reducing the cut amount thereof.