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刘政,陈涛,陈志平,刘小梅.双向弱电磁搅拌+等温保温处理制备半固态A356合金浆料的研究*[J].稀有金属材料与工程(英文),2019,48(5):1664~1670.[Liu Zheng,Chen Tao,Chen Zhiping and Liu Xiaomei.Research on Semisolid A356 Alloy Slurry Fabricated by Two-Way Slightly Electromagnetic Stirring and Isothermal Holding[J].Rare Metal Materials and Engineering,2019,48(5):1664~1670.]
Research on Semisolid A356 Alloy Slurry Fabricated by Two-Way Slightly Electromagnetic Stirring and Isothermal Holding
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Received:October 18, 2017  Revised:January 18, 2018
DOI:
Key words: semisolid  A356 aluminum alloy  two-way slightly electromagnetic stirring  isothermal holding  solidified microstructure
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Author NameAffiliation
Liu Zheng,Chen Tao,Chen Zhiping and Liu Xiaomei  
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Abstract:
      A new technology combined with slightly electromagnetic stirring and melt isothermal holding technology was formed: Two-way slightly electromagnetic stirring and isothermal holding. The effects of the isothermal holding temperature from 580℃ to 610 ℃and the isothermal holding time from 3min to 15min on the evolution of solidification microstructure were researched. The results indicated that under different isothermal heat treatment parameters, as the temperature increased and time prolonged, the size of the primary grains was gradually refined and spheroidized. However, the threshold value of the isothermal holding temperature and time could be found, so the grains became coarsened. Above the threshold value, by comparing the microstructure of the grain, it was found that the proper parameters were the isothermal holding temperature of 600℃and the isothermal holding time under 7min, at this conditions, the average equal-area circle diameter and average shape factor of the primary phase were 29.4μm and 0.86, respectively. Therefore, the proper temperature and time was the semisolid A356 aluminum alloy in the composite process to match the reasonable melt isothermal holding process parameters. The qualified semisolid aluminum alloy slurry could be prepared by the new composite process.