EW 420 EXTRA THICK MARINE STEEL SHEET AND MANUFACTURING METHOD THEREFOR

An EW 420 extra thick marine steel sheet, which relates to the technical field of steel production. Internal defects such as blank segregation and loosening are reduced and the inclusion elements As, Sn, Sb, Pb, Bi and B are controlled by smelting clean steel; columnar crystals are crushed and auste...

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG, XiaoXue, LI, HengKun, BO, FeiHu, ZHAO, JinBin, CHE, MaJun, CEHN, LinHeng, HUANG, JianHua, QIU, BaoWen
Format:	Patent
Sprache:	chi ; eng ; fre
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	An EW 420 extra thick marine steel sheet, which relates to the technical field of steel production. Internal defects such as blank segregation and loosening are reduced and the inclusion elements As, Sn, Sb, Pb, Bi and B are controlled by smelting clean steel; columnar crystals are crushed and austenite grains are refined by means of rough rolling at high temperature, at a low speed and under high pressure; and the objective of controlling tissue morphology and grain size is obtained by means of finish rolling cumulative deformation and cooperative cooling control. Une feuille d'acier EW 420 ultra-épaisse de qualité marine, qui se rapporte au domaine technique de la production d'acier. Des défauts internes tels que la séparation et le détachement d'ébauche sont réduits et les éléments d'inclusion As, Sn, Sb, Pb, Bi et B sont régulés par fusion d'acier propre ; des cristaux colonnaires sont broyés et des grains d'austénite sont raffinés par laminage grossier à haute température, à faible vitesse et sous haute