C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/00 (2006.01) C21D 8/02 (2006.01) C22C 38/58 (2006.01)
Patent
CA 2271639
A hot rolled steel plate to be processed capable of being manufactured easily in a general hot strip mill, and having a low mechanical anisotropy and, moreover, final hyperfine particles of ferrite of less than 2 µm which could not be attained by conventional techniques; and a method of manufacturing the same. This hot rolled steel plate contains ferrite as a main phase, and has an average ferrite particle size of less than 2 µm and an aspect ratio of the same of less than 1.5, the hot rolled steel plate being obtained by carrying out the draft of the steel plate in a dynamic recrystallization zone in a draft path of not less than five stands during a finishing hot rolling operation.
Plaque d'acier laminée à chaud pouvant être fabriquée sans difficultés dans un laminoir à bandes à chaud, possédant une anisotropie mécanique basse et contenant, de plus, des particules hyperfines de ferrite inférieures à 2 mu m, ce qui était impossible à obtenir par des techniques classiques, et son procédé de fabrication. Cette plaque d'acier laminée à chaud contient de la ferrite en tant que phase principale, les particules de ferrites présentant un diamètre moyen inférieur à 2 mu m, ladite plaque présentant un rapport d'aspect inférieur à 1,5. La fabrication de cette plaque d'acier laminée à chaud consiste à effectuer le laminage de la plaque d'acier dans une zone de recristallisation dynamique dans un trajet de laminage comportant un nombre de montants non inférieur à cinq pendant une opération de finition de laminage à chaud.
Furukimi Osamu
Morita Masahiko
Okada Susumu
Yasuhara Eiko
Kawasaki Steel Corporation
Smart & Biggar
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