Experimental Studies of Heat-Transfer Behavior at a Casting/Water-Cooled-Mold Interface and Solution of the Heat-Transfer Coefficient

International Conference on Mechanical Engineering and Applied Composite Materials

机械制造;材料科学

Zeng, Y.D.^1 ; Wang, F.^1

College of Materials Science and Engineering, Inner Mongolia University of Technology, Huhehaote

010051, China^1

关键词: Casting/mold interfaces;    Experimental modeling;    Gravity casting;    Heat transfer behavior;    Interface heat transfer coefficient;    Inverse analysis methods;    Measured temperatures;    Solidification process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/307/1/012012/pdf
DOI  :  10.1088/1757-899X/307/1/012012

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, we propose an experimental model for forming an air gap at the casting/mold interface during the solidification process of the casting, with the size and formation time of the air gap able to be precisely and manually controlled. Based on this model, experiments of gravity casting were performed, and on the basis of the measured temperatures at different locations inside the casting and the mold, the inverse analysis method of heat transfer was applied to solve for the heat-transfer coefficient at the casting/mold interface during the solidification process. Furthermore, the impacts of the width and formation time of the air gap on the interface heat-transfer coefficient (IHTC) were analyzed. The results indicate that the experimental model succeeds in forming an air gap having a certain width at any moment during solidification of the casting, thus allowing us to conveniently and accurately study the impact of the air gap on IHTC using the model. In addition, the casting/mold IHTC is found to first rapidly decrease as the air gap forms and then slowly decrease as the solidification process continues. Moreover, as the width of the air gap and the formation time of the air gap increase, the IHTC decreases.