POWDER FOR CONTINUOUSLY CASTING STEEL AND METHOD FOR CONTINUOUSLY CASTING STEEL USING THE POWDER

摘要

PROBLEM TO BE SOLVED: To prevent the development of longitudinal cracking flaw on the surface of a cast slab because the slow cooling effect of solidified shell is sufficiently obtd. and to prevent the development of cracking flaw and constraining breakout because the sufficient lubrication between a mold and the solidified shell is obtd. ;SOLUTION: This method uses powder for continuous casting having 800-1200°C solidified temp. and 0.8-1.6 CaO/SiO₂ and containing 1-15% cryolite. In such a case, the content of the cryolite at 1-15% can be adjusted by mixing the crolite in the general powder for continuous casting having substantially no content of the cyrolite.;COPYRIGHT: (C)1998,JPO