混合稀土对ZL301合金组织及力学性能的影响

高红选; 卫广智; 张晓燕; 樊磊

doi:10.15980/j.tzzz.2014.09.067

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混合稀土对ZL301合金组织及力学性能的影响
Effect of Mixture Rare Earth on Microstructures and Mechanical Properties of ZL301 Alloy
2014年34卷第9期页码：973-976
纸质出版日期： 2014 ，
DOI： 10.15980/j.tzzz.2014.09.067

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[1]高红选,卫广智,张晓燕,樊磊.混合稀土对ZL301合金组织及力学性能的影响[J].特种铸造及有色合金,2014,34(09):973-976.

Gao Hongxuan, Wei Guangzhi, Zhang Xiaoyan, et al. Effect of Mixture Rare Earth on Microstructures and Mechanical Properties of ZL301 Alloy[J]. Special Casting & Nonferrous Alloys, 2014,34(9):973-976.
[1]高红选,卫广智,张晓燕,樊磊.混合稀土对ZL301合金组织及力学性能的影响[J].特种铸造及有色合金,2014,34(09):973-976. DOI： 10.15980/j.tzzz.2014.09.067.

Gao Hongxuan, Wei Guangzhi, Zhang Xiaoyan, et al. Effect of Mixture Rare Earth on Microstructures and Mechanical Properties of ZL301 Alloy[J]. Special Casting & Nonferrous Alloys, 2014,34(9):973-976. DOI： 10.15980/j.tzzz.2014.09.067.

摘要

研究了不同混合稀土添加量对铸态及固溶态ZL301合金显微组织和力学性能的影响。结果表明

混合稀土能细化铸态合金的晶粒

形成Al-RE相

沿晶界不连续分布

起到晶界强化作用

从而提高了合金的抗拉强度和伸长率。当混合稀土添加量为0.5%、固溶处理工艺为435℃×16h时

ZL301合金的综合性能达到最佳。当混合稀土添加量为0.8%时

Al-RE相开始沿晶界连续分布

降低了晶界的结合强度

合金的强度和韧性下降。

Abstract

Effects of different RE addition and solid solution treatment on microstructure and tensile properties of as-cast and as-solution ZL301 alloy were investigated.The results indicate that tensile strength and elongation of the as-cast alloy can be improved with mixture RE addition

which are attributed to grain refinement and creation of Al-RE discontinuously distributed along grain boundary to strengthen grain boundary.The mechanical properties of ZL301 alloy exhibits desirable with 0.5% RE addition and solution treatment at 435℃for 16 h.With mixture RE addition more than 0.5%

the tensile strength and elongation of the alloy are deteriorated as a result of Al-RE phase continuously distributed along grain boundary decreasing bonding strength of grain boundary.