Experimental determination of the interfacial heat transfer during cooling and solidification of molten metal droplets impacting on a metallic substrate: effect of roughness and superheat

被引:65
作者
Wang, GX [1 ]
Matthys, EF
机构
[1] Univ Akron, Dept Mech Engn, Akron, OH 44325 USA
[2] Univ Calif Santa Barbara, Dept Mech & Environm Engn, Santa Barbara, CA 93106 USA
基金
美国国家科学基金会;
关键词
D O I
10.1016/S0017-9310(02)00199-0
中图分类号
O414.1 [热力学];
学科分类号
摘要
The interfacial heat transfer between a solidifying molten metal and a metallic substrate is critical in many processes such as strip casting and spray deposition. As the molten metal cools down and solidifies, the interface undergoes a change from the initial liquid/solid contact to a solid/solid contact, leading to very dynamic variations in the rate of interfacial heat transfer. This article presents the results of an experimental study of the contact heat transfer when molten nickel or copper droplets are dropped on an inclined metallic substrate. The interfacial heat transfer coefficient, h, between the melt and the substrate is evaluated by matching model calculations with the top splat surface temperature history measured by a fast-response pyrometer. The results suggest that a high value of the interfacial heat transfer coefficient h (10(4) to 3 x 10(5) W/m(2) K) is achieved when the molten splat is in contact with the substrate, followed by a smaller value (<10(4) W/m(2) K) during the later stages of solidification and the solid cooling phase. A parametric study was performed to investigate the effect on h of the metal/substrate materials combination, the melt superheat, and the substrate surface roughness, and some of the results are also presented. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:4967 / 4981
页数:15
相关论文
共 50 条
[41]   EFFECT OF PRESSURE ON METAL-DIE HEAT-TRANSFER COEFFICIENT DURING SOLIDIFICATION [J].
SEKHAR, JA ;
ABBASCHIAN, GJ ;
MEHRABIAN, R .
MATERIALS SCIENCE AND ENGINEERING, 1979, 40 (01) :105-110
[42]   EFFECT OF PRESSURE ON METAL-DIE HEAT-TRANSFER COEFFICIENT DURING SOLIDIFICATION [J].
SEKHAR, JA ;
ABBASCHIAN, GJ ;
MEHRABIAN, R .
JOURNAL OF METALS, 1979, 31 (08) :F56-F56
[43]   Metal-mould interfacial heat transfer during solidification of cast iron against cast iron chills [J].
Prabhu, KN ;
Griffiths, WD .
SECOND INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES, 2000, :1069-1074
[44]   Evolution of interfacial heat transfer, contact behavior and microstructure during sub-rapid solidification of molten steel with different hydrogen contents [J].
Lu, Cheng ;
Wang, Wan-lin ;
Zhu, Chen-yang ;
Zeng, Jie ;
Liu, Xin-yuan ;
Li, Hua-long .
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL, 2024, 31 (01) :215-223
[45]   Evolution of interfacial heat transfer, contact behavior and microstructure during sub-rapid solidification of molten steel with different hydrogen contents [J].
Cheng Lu ;
Wan-lin Wang ;
Chen-yang Zhu ;
Jie Zeng ;
Xin-yuan Liu ;
Hua-long Li .
Journal of Iron and Steel Research International, 2024, 31 :215-223
[46]   The effect of melt temperature profile on the transient metal/mold heat transfer coefficient during solidification [J].
Ferreira, IL ;
Spinelli, JE ;
Pires, JC ;
Garcia, A .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 408 (1-2) :317-325
[47]   MEASUREMENTS OF METAL-MOLD INTERFACIAL HEAT TRANSFER COEFFICIENTS DURING SOLIDIFICATION OF Sn AND Sn-Pb ALLOYS [J].
Reddy, A. V. ;
Beckermann, C. .
EXPERIMENTAL HEAT TRANSFER, 1993, 6 (02) :111-129
[48]   Determination of the Magnitude of Interfacial Air-gap and Heat Transfer during Ingot Casting into Permanent Metal Moulds by Numerical and Experimental Techniques [J].
Swan, Jason ;
Ward, R. M. ;
Reed, R. C. .
LIGHT METALS TECHNOLOGY 2013, 2013, 765 :276-+
[49]   Effect of Spray Pressure and Height on Interfacial Heat Transfer of H13 Steel during Spray Cooling [J].
Wang, Zi-Chao ;
Zhao, Hai-Dong ;
Wang, Guo ;
Lei, Yue-Qin .
ISIJ INTERNATIONAL, 2022, 62 (01) :149-156
[50]   Estimating the Effective Metal-Mould Interfacial Heat Transfer Coefficient via Experimental-Simulated Cooling Curve Convergence [J].
Eli Vandersluis ;
Comondore Ravindran .
Transactions of the Indian Institute of Metals, 2018, 71 :1231-1236