东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2007, Vol. 28 ›› Issue (2): 205-208.DOI: -

• 论著 • 上一篇    下一篇

外场作用下ZL201合金近液相线铸造与触变成形

王平;郑连辉;刘晓涛;崔建忠;   

  1. 东北大学材料电磁过程研究教育部重点实验室;东北大学材料电磁过程研究教育部重点实验室;东北大学材料电磁过程研究教育部重点实验室;东北大学材料电磁过程研究教育部重点实验室 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2007-02-15 发布日期:2013-06-24
  • 通讯作者: Wang, P.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50374031);;

Near-liquidus electromagnetic casting of ZL201 alloy and thixoforming

Wang, Ping (1); Zheng, Lian-Hui (1); Liu, Xiao-Tao (1); Cui, Jian-Zhong (1)   

  1. (1) Key Laboratory of Electromagnetic Processing of Materials, Northeastern University, Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2007-02-15 Published:2013-06-24
  • Contact: Wang, P.
  • About author:-
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摘要： 采用电子显微镜、图像分析仪、维氏硬度计及电子拉伸机,研究了ZL201合金近液相线电磁铸造(NLEMC)的铸态显微组织,进行了触变成形实验,测试了成形件的力学性能.结果表明,NLEMC半固态合金坯料的组织为细小、均匀的等轴晶组织,其晶粒平均等积圆直径为68.8μm;触变成形件的维氏硬度及抗拉强度分别为116.2 HV和308 MPa,均优于电磁铸造和近液相线铸造的合金组织与触变成形件的性能;讨论了NLEMC晶粒细化的机理.

关键词: 近液相线, 电磁铸造, 触变成形, 组织, 力学性能

Abstract: The as-cast microstructure of ZL201 alloy prepared by near-liquidus electromagnetic casting (NLEMC) was studied by means of electron microscope and image analyzer, and the mechanical properties of the alloy parts thixoformed were given through tests. The results showed that the semi-solid ZL201 alloy ingot prepared by NLEMC shows fine and homogeneous equiaxed grain structure and its average-equivalent-circle grain diameter is 48.8 μm, with the hardness of thixoformed parts 116.2 HV and tensile strength 308 MPa. All these indicated that both the as-cast microstructure of ZL201 alloy and mechanical properties of its thixoformed parts prepared by NLEMC process are superior to those of the alloy prepared by either electromagnetic casting or near-liquidus casting. The mechanism of grain refinement of as-cast ZL201 alloy prepared by NLEMC was discussed.

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