Effects of Short-term Holding Process on Temperature and Microstructure of Semi-solid Aluminum Alloy Slurry Poured by a Serpentine Channel

Wu Zongchuang; Mao Weimin; Chen Zhengzhou

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Effects of Short-term Holding Process on Temperature and Microstructure of Semi-solid Aluminum Alloy Slurry Poured by a Serpentine Channel
Vol. 30, Issue 10, Pages: 909-912(2010)
Published： 2010 ，
DOI：

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[1]吴宗闯,毛卫民,陈正周.短时均热工艺对蛇行通道浇注的半固态铝合金浆料温度和组织的影响[J].特种铸造及有色合金,2010,30(10):909-912+983.

Wu Zongchuang, Mao Weimin, Chen Zhengzhou. Effects of Short-term Holding Process on Temperature and Microstructure of Semi-solid Aluminum Alloy Slurry Poured by a Serpentine Channel. [J]. Special Casting & Nonferrous Alloys 30(10):909-912(2010)
[1]吴宗闯,毛卫民,陈正周.短时均热工艺对蛇行通道浇注的半固态铝合金浆料温度和组织的影响[J].特种铸造及有色合金,2010,30(10):909-912+983. DOI：

Wu Zongchuang, Mao Weimin, Chen Zhengzhou. Effects of Short-term Holding Process on Temperature and Microstructure of Semi-solid Aluminum Alloy Slurry Poured by a Serpentine Channel. [J]. Special Casting & Nonferrous Alloys 30(10):909-912(2010) DOI：

摘要

采用蛇形通道浇注制备半固态A356铝合金浆料

试验研究了短时电磁感应均热工艺对浆料温度和组织的影响规律。结果表明

利用短时电磁感应均热可以使蛇形通道浇注的半固态A356铝合金浆料的内部温差显著变小

最终可达到±1℃

可以满足流变成形的需要。同时

经过短时电磁感应均热后

初生α-Al晶粒得到进一步球化

但也发生了晶粒粗化。均热功率对蛇形通道浇注制备的半固态A356铝合金浆料组织有一定的影响。当均热功率为1.6～3.6kW时

随均热功率的增大

均热时间缩短

初生α-Al晶粒更细小。浆料的均热温度对蛇形通道浇注制备的半固态A356铝合金浆料组织有一定的影响。当浆料温度为595～608℃时

浆料的均热温度越低

初生α-Al晶粒越细小。

Abstract

Semi-solid A356aluminum alloy slurry was prepared by a serpentine channel

and the slurry was heated for a short time by an induction heating system and then finally quenched in water to observe effects of short-time electromagnetic heating on temperature and microstructure of the slurry.The results reveal that temperature difference between the inner slurry and periphery slurry can be decreased greatly through short-term induction heating process

reaching the range of±1℃

fulling meeting the requirements of rheo-forming.Meanwhile

primaryα-Al phase becomes more spherical with the coarseness of grain size.Heating power has some effects on microstructure of the slurry when heating power is in range of 1.6～3.6kW

with increasing in heating power

heating time is shortened and primaryα-Al phase is refined.The slurry temperature has also somewhat effects on the slurry microstructure.When the temperature is in range of 595～608℃

with decreasing in temperature

the primaryα-Al phase is refined.