Abstract
Based on the production practice of medium carbon thin slabs in the CSP plant, the reasons and influencing factors for the formation of longitudinal cracks were investigated, and some industrial measures were taken to eliminate the cracks. The results show that the efficient solutions to reduce longitudinal cracks are improving the performance of the mold powder, stabilizing the mold heat flux, and maintaining a proper taper of the mold during casting. Proper pouring temperature and secondary cooling also play important roles in preventing longitudinal surface cracks.
Similar content being viewed by others
References
N.Y. Tian, Thin Slab Continuous Casting and Rolling, 2nd Ed., Metallurgical Industry Press, Beijing, 2007, p.1.
M. Suzukl, C. Yu, and T. Emi, In-situ measurement of fracture strength of solidifying steel shells to predict upper limit of casting speed in continuous caster with oscillating mold, ISIJ Int., 37(1997), No.4, p.375.
J. Konishi, M. Militzer, J.K. Brimacombe, et al., Modeling the formation of longitudinal facial cracks during continuous casting of hypoperitectic steel, Metall. Mater. Trans. B, 33(2002), p.413.
M. Suzukl, C. Yu, H. Sato, et al., Origin of heat transfer anomaly and solidifying shell deformation of peritectic steels in continuous casting, ISIJ Int., 36(1996), p.171.
G.H. Wen, G. Li, and F.J. He, Study on behavior of molten steel in thin slab continuous casting mold, J. Northeast. Univ. Nat. Sci. (in Chinese), 19(1998), No.5, p.94.
H.Y. He, H.B. Zhang, Q.Y. Han, Numerical simulation comparison of force field in CSP with in thick slab mold, Continuous Cast. (in Chinese), 2006, No.4, p.23.
X.H. Wang, Z.Y. Zhu, L. Zhang, et al., Longitudinal surface cracks on continuous casting slabs of P and Cu containing container steel, J. Univ. Sci. Technol. Beijing, 10(2003), No.4, p.16.
T. Anazawa and S. Hiraki, High-speed continuous casting technology, Foreign Steel, 1995, No.8, p.29.
H. Nakato, M. Ozawa, K. Kinoshita, et al., Factors affecting the formation of shell and longitudinal cracks in mold during high speed continuous casting of slabs, Trans. ISIJ, 24(1984), p.957.
K.K. Cai, Casting and Solidification, Metallurgical Industry Press, Beijing, 1987.
S. Hiraki, K. Nakajima, T. Murakami, et al., Influence of mould heat fluxes on longitudinal surface cracks during high speed continuous casting of steel slab, [in] Proceeding of the 77th Steelmaking Conference, Chicago, 1994, p.397.
Y.F. Wang, Influencing factors of longitudinal surface cracking of CSP slab, Iron Steel (in Chinese), 41(2006), No.7, p.25.
G.H. Wen and J.H. Chi, Investigation on surface longitudinal crack of continuous cast slab of subperitectic steel, Iron Steel Vanadium Titanium (in Chinese), 20(1999), No.3, p.1.
G.L. Yu, T. Inoue, and H. Yasunaka, Effect of melt flow on initial solidified shell of continuous casts trand, Iron Steel (in Chinese), 33(1998), No.4, p.13.
B.C. Shen, S.H. Ye, R.J. Xu, et al., Study of process parameters on level fluctuation in CSP mould of continuous thin slab casting, Iron Steel (in Chinese), 41(2006), p.305.
M. Suzukl, M. Suzukl, and M. Nakada, Perspectives of research on high-speed conventional slab continuous casting of carbon steels, ISIJ Int., 41(2001), No.7, p.670.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Sun, Yh., Ni, Yj., Wang, Ht. et al. Longitudinal surface cracks of thin slabs. Int J Miner Metall Mater 17, 159–166 (2010). https://doi.org/10.1007/s12613-010-0207-x
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12613-010-0207-x