METHOD AND APPARATUS FOR CASTING AND ROLLING THIN SLAB

PURPOSE:To offer a move complete manufacturing process for a thin slab for steel plate by adding a concept necessary to deal with various sizes of formed parts and to secure high quality of the formed parts in consideration of the level of the existing equipment technology. CONSTITUTION:Method for casting and rolling a thin slab characterized by rolling a solidified part of the thin slab cast by a belt-type thin slab continuous casting machine and its neighboring cast parts gradually by a multistage in-line rolling down equipment, then, executing the finish-rolling keeping the temp. over the transformation point Ar3 is offered. Since restraint for production followed by the size of the formed part is removed by the thin slab process of this invention, the production by the thin slab process is increased drastically and peeling of scale in the time of rolling can be carried out satisfactorily and a problem on surface defect coming from process troubles is solved. Further, the quality of the formed part, too, is improved and it is possible to manufacture a kind of sot steel which requires high workability which is especially a problem in the thin slab process and applicable kinds of steel are increased remarkably.