| 摘要 |
PROBLEM TO BE SOLVED: To prevent longitudinal cracks in the surface of a cast slab and a recess in the cast slab caused by non-uniform solidification of a solidified shell in the vicinity of the meniscus in a continuous casting mold. SOLUTION: A continuous casting method of steel is provided by using a mold made of copper plate in which lattice-shaped plates 2 made of dissimilar metal or alloy of lower thermal conductivity than that of copper is provided on a surface of at least a longer side copper plate 1 with the lattice interval (a) of 10∼40mm, the plating width (b) (mm) satisfies the inequality of 0.2a<=b<=0.5a, the thickness is >=0.5mm, and the arrangement of the lattice is inclined in relation to the drawing direction of the cast slab, and by using the mold powder to satisfy the inequality ofη<=0.3Vc+1.5, whereηis the viscosity (poise) at 1300 deg.C and Vc(m/min.) is the drawing speed of cast slab, with the melting point is <=1100 deg.C.
|
