Titanium killed steel sheet and method

Details Titanium killed steel sheet and method Titanium killed steel sheet and method

C - Chemistry, Metallurgy

22

C

C22C 38/14 (2006.01) C21C 7/00 (2006.01) C21C 7/06 (2006.01)

Patent

CA 2248464

Titanium killed steel sheets which are not troubled by nozzle clogging while they are produced in a continuous casting process, have few surface defects caused by cluster-type inclusions, and are highly rust resistant, and are formed from a melt of titanium killed steel that contains any one or two of Ca and metals REM in an amount of not smaller than 0.0005 % by weight, and wherein the steel contains major oxide inclusions of any one or two of CaO and REM oxides in an amount of from about 5 to 50 % by weight, Ti oxides in an amount of not larger than about 90 % by weight, and Al2O3 in an amount of not larger than about 70 % by weight.

Divulgation de feuilles d'acier calmé au titane formées grâce à un procédé de coulage en continu qui n'est pas perturbé par un encrassement de la busette de coulée lors de leur production. Ces feuilles comportent peu de défauts superficiels provoqués par des inclusions de type agrégat, sont très résistantes à la rouille et sont formées à partir d'acier calmé au titane en fusion ayant des teneurs en Ca et/ou en métaux de terres rares (REM) supérieures ou égales à 0,0005 %, en poids. Cet acier contient d'importantes inclusions d'oxydes dont les teneurs massiques en oxydes de calcium et/ou en terres rares, en oxyde de titane et en Al2O3 sont respectivement de 5 à 50 %, inférieure ou égale à 90 % et inférieure ou égale à 70 %.

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