金属热处理 ›› 2020, Vol. 45 ›› Issue (1): 143-149.DOI: 10.13251/j.issn.0254-6051.2020.01.029

• 材料研究 • 上一篇    下一篇

Ti含量对AZ61镁合金组织和性能的影响

阎泽南, 王丽萍, 冯义成, 赵丽丽, 赵思聪, 郭二军   

  1. 哈尔滨理工大学 材料科学与工程学院, 黑龙江 哈尔滨 150040
  • 收稿日期:2019-06-18 出版日期:2020-01-25 发布日期:2020-04-03
  • 通讯作者: 冯义成,副教授,博士,主要研究方向为轻合金,E-mail:fyc7806067@163.com
  • 作者简介:阎泽南(1993—),男,硕士研究生,主要研究方向为铸造镁合金,E-mail:yzn1205@qq.com。
  • 基金资助:
    黑龙江省自然科学基金(E2018045)

Effect of Ti content on microstructure and properties of AZ61 magnesium alloy

Yan Zenan, Wang Liping, Feng Yicheng, Zhao Lili, Zhao Sicong, Guo Erjun   

  1. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin Heilongjiang 150040, China
  • Received:2019-06-18 Online:2020-01-25 Published:2020-04-03

摘要: 以AZ61镁合金为研究对象,添加K2TiF6与Mg发生原位自生反应生成Ti,采用OM、SEM观察和XRD物相分析以及拉伸性能测试等分析方法,研究了微量Ti对AZ61镁合金组织和性能的影响。研究发现,随着Ti含量的增加,AZ61合金晶粒尺寸先减小后增大,当Ti含量为1.5%时,细化效果最佳,铸态晶粒尺寸为41 μm。铸态和热处理态试样的抗拉强度和伸长率先增大后减小,最高抗拉强度分别达到201.5 MPa和223.5 MPa。

关键词: AZ61合金, K2TiF6, 晶粒细化, 热处理, 力学性能

Abstract: The Ti element was introduced into the AZ61 by adding K 2 TiF 6 . The microstructure and mechanical properties of AZ61 with trace Ti were studied by using XRD, OM, SEM, EDS and mechanical properties testing. The results show that with the increase of Ti content, the grain size of AZ61 alloy decreases first and then increases. When the Ti content is 1.5%, the refining effect is the best, and the as-cast grain size is 41 μm. The mechanical properties of the as-cast and heat-treated states first increase and then decrease, and the tensile strength reaches 201.5 MPa and 223.5 MPa, respectively.

Key words: AZ61 alloy, K2TiF6, grain refinement, heat treatment, mechanical properties

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