coulee to the continuous succession of different qualities of steel.

摘要

P process to be cast continuously with a succession of different grades of steel, in which there flows a first quality of steel, then a second quality of steel, the chemical composition of which is different from that of the first. / p & & p & it stops the casting of the first quality of the liquid steel in the mould, a body of the cooling is substantially in the central part of the first quality of the steel in the mold, it is around the body of a solidified layer which is connected to a solidified shell has been developed from the wall of the mold and poured into the second quality of the liquid steel in the mold before the surface of the first quality of the liquid steel at - the top of the body of the cooling is solidified. / p