Study on the Section Inhomogeneity of VN Microallyed Heavy Plate during Controlled Rolling

Abstract:

The finite element method and physical simulation were used to research the section effect of 50mm heavy plate microalloyed with VN during rolling and the effect of controlled rolling schedule on the section inhomogeneity. We can conclude from the results that when the whole reduction of the plate is constant, the increase of reduction in pass makes for the deformation conveying towards center layer of plate and reducing the section inhomogeneity. To the process that 220mm thick plate blank was rolled to 50mm thick plate, when the rolling pass decreased from 10 to 6, the accumulated deformation of the center layer was increased from 58.35% to 67.87%, and the austenite grain size decreased from 41.3μm to 35.4μm. The effect of final rolling temperature depends on the heat preservation: if there is no heat preservation there almost has no effect on the section homogeneity; if there has a suitable heat preservation, the section inhomogeneity can be reduced efficiently, and the best homogeneity can be obtained when final rolled at 870°C. Key words: heavy plate, VN microalloying, section effect, finite element method

• Periodical: Materials Science Forum (Volumes 704-705)
• Pages: 1416-1422
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.704-705.1416
• Online since: December 2011
• Authors: Nan Li
• Keywords: Finite Element Method (FEM), Heavy Plate, Section Effect, VN Microalloying

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