Abstract
According to the problems of bad castability of molten steel, surface longitudinal cracks and the difficulty of elimination for internal defects of billet in rolling process, the technologies of continuous casting process and quality control for square/round billet have been studied systematically. On this basis, integrated techniques of continuous casting process and quality control for billets are proposed, containing castability optimization, surface and internal quality improvement of billets. Large scale production application shows that the number of heats per sequence in a single tundish is increased from 4~5 heats to 7~8 heats. The non-defect rates of surface quality reach 98.91% and 97.81% for square billet and round billet, respectively. The comprehensive rates below level 1.0 of internal defects of center porosity, center segregation and center cracks are above 98.9%% and 98.5% for square billet and round billet, respectively. Furthermore, carbon segregation index is in the range of 0.93~1.09.
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References
J. K. Brimacombe. The challenge of quality in continuous casting processes [J]. Metallurgical and materials transactions A. 1999, 30A: 1899–1912.
J. K. Brimacombe. Design of continuous casting machines based on a heat-flow analysis: state-of-the-art review [J]. Canadian Metallurgical Quarterly. 1976, 15 (2): 163–175.
I. Weiss, J.J. Jonas. Interaction between recrystallization and precipitation during the high temperature deformation of HSLA steels [J]. Metal Transaction, 1979, (10A):831–840
Wen Liangying, Zhang Jian, Chen Dengfu, et al. Optimization of secondary cooling water distribution system for high-strength, low-alloy steel in continuous casting [J]. Journal of Chongqing University, 2008, 31(9): 1008–1011, 1017.
Wang Xinhua, Chang bo, Li Jingjie, et al. Ductility loss and Nb(C, N) Precipitation in Nb-containing steel slab in the temperature range from 700 to 1000 [°C]. ACTA Metallurgica Sinica, 1997, 33(5): 485–491.
Hyun Jo Jun, K. B. Kang, C. G. Park. Effects of cooling rate and isothermal holding on the precipitation behavior during continuous casting of Nb–Ti bearing HSLA steels[J], Scripta Materialia, 2003, 49(11):1081–1086.
Hu Zhigang, Ma Chunlin, Liu Liu, et al. Region of peritectic reaction in thin slab casting process of CSP [J]. Journal of Iron and Steel Research, 2006,18(7): 10–13.
Jian Zhang, Dengfu Chen, Mujun Long et al. Secondary Cooling Technology for Casting of Hypo-peritectic Steels. The Minerals, Metals & Materials Society 2010. Seattle, USA, 2010, (10): 535–541.
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Yong, C., Dade, Z., Guorong, W., Hong, P. (2013). Key Technologies for Square/Round Billet Continuous Casting. In: Marquis, F. (eds) Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing. Springer, Cham. https://doi.org/10.1007/978-3-319-48764-9_314
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DOI: https://doi.org/10.1007/978-3-319-48764-9_314
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48586-7
Online ISBN: 978-3-319-48764-9
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