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http://nopr.niscpr.res.in/handle/123456789/30522| Title: | An improved model for predicting heat transfer coefficient peak value at the casting-die interfaces |
| Authors: | Xu, Rong Li, Luoxing Zhang, Liqiang Zhu, Biwu Bu, Xiaobing |
| Keywords: | Interfacial heat transfer coefficient peak value;Profile of die surface;Surface tension;Casting-die contact mechanism;Thermal contact resistance;Gravity die-casting |
| Issue Date: | Dec-2014 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | An improved model is developed to accurately predict the interfacial heat transfer coefficient peak value (hmax) at the casting-die interface during the solidification of light alloys. To develop the improved model, a new method is proposed to simplify the profile of die surface. The effect of surface tension on the predicted hmax is considered quantitatively in this model. The improved model has been applied to high pressure die casting and gravity die-casting processes. The calculated hmax of the improved model tends to have higher accuracy than those of the previous model and show good agreements with the experimental results in both cases. The results suggest that the new method used to simplify the surface profile in the improved model makes a major contribution to improve the prediction accuracy. Surface tension is also found to have a certain effect on the calculated hmax in gravity die-casting process, but no effect in high pressure die casting process. Its effect appears to decrease with increasing applied pressure. |
| Page(s): | 628-634 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Appears in Collections: | IJEMS Vol.21(6) [December 2014] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJEMS 21(6) 628-634.pdf | 223.35 kB | Adobe PDF | View/Open |
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