东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (12): 1719-1723.DOI: 10.12068/j.issn.1005-3026.2015.12.011

• 材料与冶金 • 上一篇    下一篇

La对AlSi10Cu0.2Mg0.2Mn和ZnAl12Cu1(Mg)铸造合金力学性能的影响

张福男1,2, 李现慕2, 王兆文1   

  1. (1. 东北大学 材料与冶金学院, 辽宁 沈阳110819; 2. 金策工业综合大学, 朝鲜 平壤999093)
  • 收稿日期:2015-03-13 修回日期:2015-03-13 出版日期:2015-12-15 发布日期:2015-12-07
  • 通讯作者: -
  • 作者简介:张福男(1980-),男,朝鲜平壤人,朝鲜金策工业综合大学讲师,东北大学访问学者; 王兆文(1964-),男,辽宁沈阳人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51074053); 国家科技支撑计划项目(2012BAE08B01).

Effects of Rare Earth La on Mechanical Properties of Casting AlSi10Cu0.2Mg0.2Mn and ZnAl12Cu1(Mg) Alloys

JANG Pok-nam1, 2, LI Hyon-mo2, WANG Zhao-wen1   

  1. 1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China; 2.Kim Chaek University of Technology, Pyongyang 999093, D. P. R of Korea.
  • Received:2015-03-13 Revised:2015-03-13 Online:2015-12-15 Published:2015-12-07
  • Contact: JANG Pok-nam
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摘要: 利用Al-La中间合金制备了AlSi10Cu0.2Mg0.2Mn-xLa和ZnAl12Cu1(Mg)-xLa铸造合金,考察了不同的La含量对合金组织和抗拉强度、伸长率、冲击强度等性能的影响.研究结果表明:微量稀土La可以细化合金的晶粒,改变Si相晶粒大小和形状.与未添加La的合金相比,含有微量稀土La的AlSi10Cu0.2Mg0.2Mn-xLa合金和ZnAl12Cu1(Mg)-xLa合金具有更优良的力学性能.当AlSi10Cu0.2Mg0.2Mn铸造合金中La添加量为0.15%(质量分数)时,铸造合金的伸长率增加2.7倍.含有0.1%(质量分数)La的ZnAl12Cu1(Mg)-xLa合金抗拉强度和伸长率相比于未添加稀土La的合金,分别增强1.3倍和3.2倍.含有0.3%(质量分数)La时ZnAl12Cu1(Mg)-xLa的硬度增强1.8倍,但冲击强度是含有0.15%(质量分数)La时最高.综合考虑ZnAl12Cu1(Mg)-xLa铸造合金的机械性能,稀土La的最优添加量为0.1%~0.2%(质量分数).

关键词: 稀土La, Al-La中间合金, 铸造铝合金, 铸造锌合金, 力学性能

Abstract: AlSi10Cu0.2Mg0.2Mn-xLa and ZnAl12Cu1(Mg)-xLa casting alloy were prepared by Al-La master alloy. The effect of La content on the microstructure, tensile strength, elongation and impact strength of these alloys were investigated. The results indicated that the crystalline grain of alloys could be refined by addition of La element and the size and shape of Si phase particle were also modified. Compared with the previous alloys, the mechanical properties of AlSi10Cu0.2Mg0.2Mn-xLa alloy and ZnAl12Cu1(Mg)-xLa alloy containing traces of La were relatively improved. When 0.15wt% of La was added in AlSi10Cu0.2Mg0.2Mn casting alloy, the elongation could increase to 2.7 times. The tensile strength and elongation of ZnAl12Cu1(Mg)-xLa containing 0.1wt% of La was increased to 1.3 and 3.2 times, respectively. The hardness of ZnAl12Cu1(Mg)-xLa containing 0.3wt% of La was increased to 1.8 times while ZnAl12Cu1(Mg)-xLa containing 0.15wt% of La exhibited the maximum impact strength. Comprehensively considering the mechanical properties of ZnAl12Cu1(Mg)-xLa casting alloy, the optimal addition content of La was controlled in the range of 0.1wt%~0.2wt%.

Key words: rare earth La, Al-La master alloy, cast Al alloy, cast Zn alloy, mechanical property

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