Nd对铸态及轧制态Mg-Zn-Y合金组织及性能的影响

高秋然; 祝要民; 任凤章; 方世杰; 张旦闻; 赵士阳

doi:10.15980/j.tzzz.2012.06.026

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Nd对铸态及轧制态Mg-Zn-Y合金组织及性能的影响
Effect of Nd on Microstructure and Properties of As-cast and Hot-rolled Mg-Zn-Y Alloys
2012年32卷第6期页码：558-561
纸质出版日期： 2012 ，
DOI： 10.15980/j.tzzz.2012.06.026

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[1]高秋然,祝要民,任凤章,方世杰,张旦闻,赵士阳.Nd对铸态及轧制态Mg-Zn-Y合金组织及性能的影响[J].特种铸造及有色合金,2012,32(06):558-561.

Gao Qiuran1, Zhu Yaomin1, Ren Fengzhang1, et al. Effect of Nd on Microstructure and Properties of As-cast and Hot-rolled Mg-Zn-Y Alloys[J]. Special Casting & Nonferrous Alloys, 2012,32(6):558-561.
[1]高秋然,祝要民,任凤章,方世杰,张旦闻,赵士阳.Nd对铸态及轧制态Mg-Zn-Y合金组织及性能的影响[J].特种铸造及有色合金,2012,32(06):558-561. DOI： 10.15980/j.tzzz.2012.06.026.

Gao Qiuran1, Zhu Yaomin1, Ren Fengzhang1, et al. Effect of Nd on Microstructure and Properties of As-cast and Hot-rolled Mg-Zn-Y Alloys[J]. Special Casting & Nonferrous Alloys, 2012,32(6):558-561. DOI： 10.15980/j.tzzz.2012.06.026.

摘要

在Mg-3.5Zn-0.6Y合金中添加不同含量（0、0.4%、0.8%、1.2%）的稀土元素Nd

研究其对Mg-3.5Zn-0.6Y合金铸态及轧制态显微组织与力学性能的影响。结果表明

添加0.4%、0.8%的Nd的合金晶粒较细小

呈等轴晶

并且含有Mg41Nd5和Mg24Y5相。镁合金在热轧时第二相被破碎

晶粒变得更加细小。铸态合金经400℃×12h扩散退火

轧制态合金经400℃×0.5h退火后抗拉强度及伸长率最大

分别为234MPa、14.6%和265MPa、11.7%。

Abstract

Effects of rare-earth Nd additions including 0

0.4%

0.8% and 1.2% on microstructure and mechanical proeprties of as-cast and hot-rolled Mg-3.5Zn-0.6Y alloys were investigated

respectively.The results show that the grain exhibits fine equiaxed crystals in the Mg-3.5Zn-0.6Y alloys with 0.4% and 0.8% Nd addition

and the second phases Mg41Nd5 and Mg24Y5 can be observed in the microstructure.The second phases are crushed during hot-rolling

resulting in the finement of grains.The tensile strength and elongation of as-cast Mg-3.5Zn-0.6Y-0.4Nd alloy with annealing at 400 ℃ for 12 h and of hot-rolled one with annealing at 400 ℃ for 0.5 h reach up to 234 MPa

265 MPa and 14.6%

11.7%

respectively.