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Different roles of microalloying in Thin Slab Direct rolling Technologies

Journal of Iron and Steel research International 2011年第S1期18卷 459-465页

作者： r.dr.guez-ibabe jose m.ur.nga pello Lopez Beatriz CEIT and Tecnun (Univ.of Navarra) P M.Lardizabal 1520018-San SebastianBasque CountrySpain

HSLA steels constitute one of the main types of steels produced worldwide by Thin Slab Direct rolling technologies (TSdr).Among microalloying elements,the most widely used are V,Nb and *** elements play different roles during the austenite evolution in *** austenite conditioning before transformation,the limitations in the total reduction that can be applied in TSdr technologies need to be considered when composition/process parameters are *** this context,whereas an important number of studies have been focused on Nb microalloyed grades,a less systematic analysis has been performed concerning the role of vanadium on austenite *** paper analyzes these singularities taking into account different process parameter conditions,such as total reduction and initial rolling temperature.

关键词： thin slab direct rolling microalloyed steels vanadium niobium austenite conditioning

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Thin Slab Direct rolling modeling of Nb microalloyed Steels

Thin Slab Direct Rolling Modeling of Nb Microalloyed Steels

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“第十届中国钢铁年会”暨“第六届宝钢学术年会”

作者： Pereda Beatriz uranga pello López Beatriz r.dr.guez-ibabe jose m. Liu Zhongzhu Stalheim Douglas Barbosa ronaldo Arantes-rebellato marcelo CEIT and TECNUN University of NavarraSan Sebastian Spain CITIC metal Co. Ltd

The production of Nb microalloyed coils by thin slab casting and direct rolling（TSdr）technologies shows some metallurgical characteristics that significantly differentiate this process from conventional casting and rolling of thick *** improved combinations of strength and thickness are sought,modeling tools designed ad hoc to predict the austenite microstructural evolution provide an insightful input to process and composition *** paper shows the latest simulation tools developed by CEIT and CBmm for different TSdr configurations available in the *** models predict grain size distributions taking into account softening-precipitation interactions,refinement due to static and dynamic recrystallization and strain accumulation during last rolling *** on the metallurgical analysis,parameters such as recrystallization Limit Temperature（rLT）and recrystallization Stop Temperature（rST）are also defined.A wider knowledge of all the mechanisms involved in these grades will open new possibilities to produce new final grades by TSdr technologies with optimized processing routes,microstructures and,as a consequence,final mechanical properties.

关键词： thin slab direct rolling Nb microalloyed steels microstructural evolution rolling mill layouts

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