Thermal characteristics and uniformity of microstructures during temperature controlled mold continuous casting profiled copper alloy strip

被引：0

作者：

Liu, Xuefeng ^{[1
,2
,3
]}

Liao, Wanneng ^{[1
]}

Yang, Yaohua ^{[1
]}

机构：

[1] School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing,100083, China

[2] Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, University of Science and Technology Beijing, Beijing,100083, China

[3] Key Laboratory for Advanced Materials Processing of Ministry of Education, University of Science and Technology Beijing, Beijing,100083, China

来源：

International Communications in Heat and Mass Transfer | 2020年 / 110卷

关键词：

Nonuniform temperature field at cross section of profiled billets during conventional continuous casting always results in serious defects and inhomogeneous microstructures. In this paper; a 3D temperature controlled mold continuous casting (TCMCC) model for preparing profiled copper strip was established and verified to calculate the magnetic and temperature field during continuous casting process. Under different controlled temperatures of TCM and casting speeds; the temperature fields in the TCM and melt were numerically calculated; and the variation of temperature fields in the mushy zone was analyzed. The calculated temperatures are in good agreement with the measured values. The results indicate the uniformity of temperature gradient (uG) at the profiled section improves significantly when the controlled temperature of TCM is higher than the liquidus temperature of alloy; further; the uG gradually reaches the minimum and then increases with increasing casting speed. Based on the calculated results; the profiled KFC copper alloy strips with good surface quality were successfully prepared by the TCMCC under controlled TCM temperature of 1423 K and casting speeds of 15–60 mm/min. The value of the uniformity of primary dendrite spacing at the cross section of the profiled strips reaches the minimum with the casting speed of 45 mm/min. © 2019 Elsevier Ltd;

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