东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (9): 1252-1255.DOI: -

• 论著 • 上一篇    下一篇

A356合金近液相线法铸造坯料及重熔加热组织研究

王平;韦春营;李晓峰;崔建忠;   

  1. 东北大学材料电磁过程研究教育部重点实验室;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家高技术研究发展计划项目(2009AA03Z534);;

Research on billet and reheat microstructure of A356 alloy by nearby liquidus casting

Wang, Ping (1); Wei, Chun-Ying (1); Li, Xiao-Feng (1); Cui, Jian-Zhong (1)   

  1. (1) Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Wang, P.
  • About author:-
  • Supported by:
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摘要： 采用近液相线半连续铸造法制备了A356铝合金半固态坯料,并利用电阻炉加热,采用电子显微镜研究了近液相线铸造A356铝合金在二次加热过程中的组织演变.结果表明:A356铝合金半固态坯料组织呈均匀、细小的蔷薇状分布;在585℃加热,保温10~15 min,可获得半固态加工所需的触变性组织.而且,保温温度和保温时间共同影响着二次加热组织的演变过程.随着加热温度的升高,α相的生长和球化的速度变快,保温时间越长,晶粒球化度越高.

关键词: A356合金, 近液相线半连续铸造, 重熔, 球化度, 半固态

Abstract: Aluminum alloy A356 with uniform, fine and rose flowered grains was obtained by nearby liquidus semi-continuous casting method. The structure evolution of aluminum alloy A356 during remelting was studied by electron microscope. The results showed that when A356 alloy was heated at 585°C for 10~15 min, semi-solid thixotropic organization was obtained. The remelting temperature and the time of heat insulation affect the evolutionary process of the organization. And the growth and globe rate of α phase increase with the remelting temperature increasing, while the roundness increases with the time of heat insulation.

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