金属热处理 ›› 2021, Vol. 46 ›› Issue (12): 130-134.DOI: 10.13251/j.issn.0254-6051.2021.12.021

• 材料研究 • 上一篇    下一篇

La-Ce混合稀土对AZ91D合金组织和性能的影响

陈利超1, 苏植成1, 任井涛1, 方立强1, 汪子超1, 王宇宇1, 赵莉萍2   

  1. 1.内蒙古一机集团 林峰特种铸造有限公司, 内蒙古 包头 014030;
    2.内蒙古科技大学 材料与冶金学院, 内蒙古 包头 014010
  • 收稿日期:2021-06-10 出版日期:2021-12-25 发布日期:2022-02-18
  • 通讯作者: 赵莉萍,教授, E-mail:zhaoliping5195@126.com
  • 作者简介:陈利超(1993—),男,硕士,主要研究方向为导热镁合金,E-mail:2503838887@qq.com。

Effect of La-Ce mischmetal on microstructure and properties of AZ91D alloy

Chen Lichao1, Su Zhicheng1, Ren Jingtao1, Fang Liqiang1, Wang Zichao1, Wang Yuyu1, Zhao Liping2   

  1. 1. Linfeng Special Casting Co., Ltd., Inner Mongolia First Machinery Group, Baotou Inner Mongolia 014030, China;
    2. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China
  • Received:2021-06-10 Online:2021-12-25 Published:2022-02-18

摘要: 以AZ91D镁合金作为研究对象,探究了La-Ce混合稀土含量对其组织性能的影响。结果表明:在AZ91D镁合金中加入混合稀土La-Ce后,铸态组织为网状β-Mg17Al12相及少量杆状稀土化合物。且随着稀土含量增多,β-Mg17Al12和杆状稀土化合物被细化。经固溶时效处理后,随稀土含量增加,试验合金伸长率增大,硬度和抗拉强度均先增后降,稀土含量为2.38%时,合金力学性能最佳。

关键词: 镁合金AZ91D, La-Ce混合稀土, 组织, 力学性能

Abstract: Taking AZ91D magnesium alloy as the research object, the effect of La-Ce mischmetal content on microstructure and properties was investigated. The results show that with the adding of La-Ce mischmetal, the as-cast microstructure is network β-Mg17Al12 phase and a few rod-shaped rare earth compounds. With the increase of rare earth content, the β-Mg17Al12 and rod-shaped rare earth compounds are refined. After solid solution and aging, with the increase of rare earth content, the elongation of the tested alloy increases, the hardness and tensile strength first increase and then decrease. When the La-Ce mischmetal content is 2.38%, the mechanical properties of the alloy are the best.

Key words: AZ91D magnesium alloy, La-Ce mischmetal, microstructure, mechanical properties

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