Thin Slab Direct Rolling Modeling of Nb Microalloyed Steels
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 slabs.When 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 optimization.This paper shows the latest simulation tools developed by CEIT and CBMM for different TSDR configurations available in the market.These models predict grain size distributions taking into account softening-precipitation interactions,refinement due to static and dynamic recrystallization and strain accumulation during last rolling passes.Based 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.
thin slab direct rolling Nb microalloyed steels microstructural evolution rolling mill layouts
Pereda Beatriz Uranga Pello López Beatriz Rodriguez-Ibabe Jose M. Liu Zhongzhu Stalheim Douglas Barbosa Ronaldo Arantes-Rebellato Marcelo
CEIT and TECNUN,University of Navarra,San Sebastian,Spain CITIC Metal Co.,Ltd,Chaoyang,Beijing,China DGS Metallurgical Solutions Inc.,Vancouver,WA,USA Metallurgical and Materials Engineering Dept.,Universidade Federal de Minas Gerais,Belo Horizonte,Br CBMM,Sao Paulo,Brazil
国内会议
上海
英文
1-6
2015-10-21（万方平台首次上网日期，不代表论文的发表时间）