TY - JOUR
T1 - Thermal and mechanical behavior of copper molds during thin-slab casting (II)
T2 - Mold crack formation
AU - Park, Joong Kil
AU - Thomas, Brian G.
AU - Samarasekera, Indira V.
AU - Yoon, Sok U.
N1 - Funding Information:
The authors thank POSCO for permission to publish this article. The authors are indebted to many people in the Technical Research Lab., POSCO. In particular, we acknowledge the support of Dr. S.Y. Kim, who supplied plant trial measurement data, and Mr. W.W. Hur and Dr. C.H. Yim, for their cooperation and assistance. The technical support of Neil Walker in conducting the mold crack analysis is warmly appreciated. The authors are also grateful for helpful discussions with Dr. T.J. Yeo and Mr. J. Shaver. Support of BGT from the Continuous Casting Consortium at the University of Illinois and from the National Science Foundation (Grant No. DMI 98-00274) is also acknowledged. Funding for this project from POSCO is gratefully acknowledged.
PY - 2002
Y1 - 2002
N2 - The formation of cracks in a funnel mold of thin-slab casting is investigated using metallographic studies and mathematical models. In Part II of this two-part article on thin-slab casting molds, short longitudinal cracks near the meniscus region of a thin-slab funnel mold are studied metallurgically. X-ray analyses revealed the formation of Cu-Zn brass on the copper matrix at high temperature where the crack initiated. Heat-transfer and thermal-elastic-viscoplastic stress models described in Part I are applied to investigate the temperature and stress fields associated with the cracks. Large cyclic inelastic strains were found in the funnel transition region just below the meniscus due to the slightly higher temperature at that location. The cracks then appear to have propagated by thermal fatigue caused by major level fluctuations at transitions. The stress and strain predictions suggest cycles to failure for molds for various hot-face temperatures.
AB - The formation of cracks in a funnel mold of thin-slab casting is investigated using metallographic studies and mathematical models. In Part II of this two-part article on thin-slab casting molds, short longitudinal cracks near the meniscus region of a thin-slab funnel mold are studied metallurgically. X-ray analyses revealed the formation of Cu-Zn brass on the copper matrix at high temperature where the crack initiated. Heat-transfer and thermal-elastic-viscoplastic stress models described in Part I are applied to investigate the temperature and stress fields associated with the cracks. Large cyclic inelastic strains were found in the funnel transition region just below the meniscus due to the slightly higher temperature at that location. The cracks then appear to have propagated by thermal fatigue caused by major level fluctuations at transitions. The stress and strain predictions suggest cycles to failure for molds for various hot-face temperatures.
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U2 - 10.1007/s11663-002-0055-9
DO - 10.1007/s11663-002-0055-9
M3 - Article
AN - SCOPUS:0036600820
VL - 33
SP - 437
EP - 449
JO - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
SN - 1073-5615
IS - 3
M1 - 55
ER -