Effect of molding parameters on porosity distribution in Fe-Ni alloy ingots under vacuum circumstanceChinese Full Text
GAO Chen;ZHANG Li-feng;LI Chong-wei;PENG Jie;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing;Institute of Materials Research,Beijing Beiye Functional Materials Corporation;
Abstract: To reduce shrinkage cavity defects in Fe-Ni alloy ingots,a numerical simulation model was established by using the finite element software ProCAST. The simulation parameters were verified by anatomical experiment. The effect of molding parameters on porosity distribution in Fe-Ni alloy ingots was investigated and an optimized ingot was obtained. It is found that the parameter setting of heat transfer under vacuum circumstance is relatively reasonable,and the simulation results produce a good fit to experimental data.The influence of riser conicity on the position of shrinkage cavities is much greater than those of mold conicity and aspect ratio. The position of shrinkage cavities increases with the reduction of riser conicity,the extent of ingot central porosities reduces as the mold conicity increases,and there is no obvious variation of shrinkage cavity defects when the aspect ratio changes. The optimized ingot can improve shrinkage cavity defects effectively.
- DOI：
10.13374/j.issn1001-053x.2014.07.006
- Series：
- Subject：
- Classification Code：
TG132.271;TG249
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