The Analysis of Heat-Transfer Coefficient At The InterfaceBetween Casting And Sand Mold

• Main Authors: Yi-To Liao, 廖尹鐸
• Other Authors: Long-Sun Chao
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/6c287h

碩士 === 國立成功大學 === 工程科學系碩博士班 === 90 === 　　In the heat-transfer analysis of a casting process, how to handle the heat transfer condition at the mold/metal interface is a key problem. If it is not manipulated properly, that will directly affect the final result of analysis. The simplest one is to assume that it is perfect contact at the interface (i.e., the temperature and the heat flux are continuous there). However, this deviates from the real condition and it needs a heat resistance or an effective heat transfer coefficient to connect the heat fluxes from both sides of the interface. To find the effective heat transfer coefficient is very important to the analyzer of casting processes. 　　This research, emphasizes on the castinng of sand mold, with the casting materials of aluminum, tin, and zinc, to produce casting model by different sizes of cylinder and rectangle. Also, to examine the temperature situation of the solidification process by thermal couple, and to count the metal temperature of the interface between metal and sand mold, in order to calculate the heat flux and effective heat transfer coefficient of the metal interface. 　　This research has finished the initial study of the effective heat transfer coefficient between sand mold and casting. The result can be the basics of the further research, and the application of package software in the future.