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| Effect of Stirring Time on Morphology and Dimension of Primary Phase in Al-Si Alloy |
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Received:June 08, 2011
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| DOI：DOI：10.3969/j.issn.1007-7545.2011.09.014 |
| KeyWord:Aluminum-silicon alloy；Primary aluminum；Primary silicon；Stirring time；Morphology |
| Author | Institution |
| TIAN Qin |
贵州大学材料与冶金学院 |
| ZHU Tao |
贵州大学材料与冶金学院 |
| LEI Yuan-yuan |
贵州大学材料与冶金学院 |
| YANG Ming |
贵州大学材料与冶金学院 |
| WAN Ming-pan |
贵州大学材料与冶金学院 |
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| Abstract: |
| In order to study the influence of stirring time on morphology and dimension of primary aluminum and primary silicon, aluminum-silicon alloy was isothermally stirred in semi-solid temperature range. The results show that morphology and dimension of primary phase in Al-Si alloy are changed under a series of physical and metallurgical processes in stirring. With prolonging of stirring time, morphology and dimension of primary aluminum evolve from thick dendritic structure to thin nearly spherical or rosiness structure, morphology and dimension of primary silicon evolve from thick polygonal blocky closed angle structure to compare rounding equiaxial structure. The refinement and spheroidization of primary aluminium are dominantly accomplished by fusing and kink. The refinement and spheroidization of primary silicon are primary accomplished by fracture, fragmentation and slaking. |
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