IMPROVED CONTACT MOULD FOR THE CONTINUOUS CASTING OF STEEL SLABS

摘要

The present invention relates to an improved mold for continuous casting of steel slabs having a thickness of 50 to 120 mm, in particular steel slabs suitable for rolling into thin strips, which molds have two large sides (F). Each of the faces has a concave or straight central region that is symmetrical with respect to each other in the horizontal cross section, both sides of which are connected to a narrow face f via concave-convex wide bends with respect to the inner part of the mold, Except for the straight length of, there is no other length parallel to the opposing part of the other large face F. The radius r1 of the concave portion and the radius r2 of the convex portion have a mutual ratio of 0.6 to 1.4, and these portions are preferably equal in each horizontal cross section of the mold and increase downwards, while the depth of the concave portion a ) Decreases downwardly and possibly constant from height (ybc) to the discharge section, but decreases continuously along the entire length of the mold such that the residual depth in the discharge zone is 5 mm or less.