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Volume 5 Issue 3
Sep.  1998
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Weimin Mao and Xueyou Zhong, Effect of the Solidification Conditions on the Microstructures of AlSi7Mg Alloy during Semi-solid Remelting, J. Univ. Sci. Technol. Beijing, 5(1998), No. 3, pp. 174-174.
Cite this article as:
Weimin Mao and Xueyou Zhong, Effect of the Solidification Conditions on the Microstructures of AlSi7Mg Alloy during Semi-solid Remelting, J. Univ. Sci. Technol. Beijing, 5(1998), No. 3, pp. 174-174.
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Effect of the Solidification Conditions on the Microstructures of AlSi7Mg Alloy during Semi-solid Remelting

  • The effect of the solidification conditions on the microstructures was studied during partial remelting of AlSi7Mg alloy with the help of an electrical pipe-type fumace. The results show that the eutectic is remelted above all and α phases are gradually evolved into spheroidal shape,if the AlSi7Mg alloys shrmd strongly by rotating electromagnetic field during the first solidification are heated again to 589 or 597℃ and have been held for a short time (for example, 5~10 min), and moreover, the higher the holding temperature,the faster the eutectic remelting process and α phase's evolution are. In contrast even though the AlSi7Mg alloy's samples non-stirred with fine dendritic microstructures are heated to the same temperatures as those stirred by rotating electromagnetic field and have been held for 60 min,it is not possible to change all the dendritic a phases to speroidal α phase.
  • Effect of the Solidification Conditions on the Microstructures of AlSi7Mg Alloy during Semi-solid Remelting

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    • The effect of the solidification conditions on the microstructures was studied during partial remelting of AlSi7Mg alloy with the help of an electrical pipe-type fumace. The results show that the eutectic is remelted above all and α phases are gradually evolved into spheroidal shape,if the AlSi7Mg alloys shrmd strongly by rotating electromagnetic field during the first solidification are heated again to 589 or 597℃ and have been held for a short time (for example, 5~10 min), and moreover, the higher the holding temperature,the faster the eutectic remelting process and α phase's evolution are. In contrast even though the AlSi7Mg alloy's samples non-stirred with fine dendritic microstructures are heated to the same temperatures as those stirred by rotating electromagnetic field and have been held for 60 min,it is not possible to change all the dendritic a phases to speroidal α phase.
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