施压熔体温度对挤压铸造Al-5.0Cu-0.6Mn-0.5Fe合金组织和性能的影响

石亚; 王智; 罗宗强; 林波; 张卫文

doi:10.15980/j.tzzz.2018.07.011

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施压熔体温度对挤压铸造Al-5.0Cu-0.6Mn-0.5Fe合金组织和性能的影响
Effects of Squeezing Melt Temperature on Microstructure and Mechanical Properties of Al-5.0Cu-0.6Mn-0.5Fe Alloy Prepared by Squeeze Casting
2018年38卷第7期页码：734-738
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.07.011

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[1]石亚,王智,罗宗强,林波,张卫文.施压熔体温度对挤压铸造Al-5.0Cu-0.6Mn-0.5Fe合金组织和性能的影响[J].特种铸造及有色合金,2018,38(07):734-738.

Shi Ya, Wang Zhi, Luo Zongqiang, et al. Effects of Squeezing Melt Temperature on Microstructure and Mechanical Properties of Al-5.0Cu-0.6Mn-0.5Fe Alloy Prepared by Squeeze Casting[J]. Special Casting & Nonferrous Alloys, 2018,38(7):734-738.
[1]石亚,王智,罗宗强,林波,张卫文.施压熔体温度对挤压铸造Al-5.0Cu-0.6Mn-0.5Fe合金组织和性能的影响[J].特种铸造及有色合金,2018,38(07):734-738. DOI： 10.15980/j.tzzz.2018.07.011.

Shi Ya, Wang Zhi, Luo Zongqiang, et al. Effects of Squeezing Melt Temperature on Microstructure and Mechanical Properties of Al-5.0Cu-0.6Mn-0.5Fe Alloy Prepared by Squeeze Casting[J]. Special Casting & Nonferrous Alloys, 2018,38(7):734-738. DOI： 10.15980/j.tzzz.2018.07.011.

摘要

采用拉伸性能测试、定量金相分析、扫描电镜等手段

研究施压熔体温度对挤压铸造Al-5.0Cu-0.6Mn-0.5Fe-0.1Ti-0.1RE合金微观组织和力学性能的影响。结果表明

在547

50℃的液固两相区

随着施压熔体温度的升高

合金的抗拉强度和伸长率缓慢增加。当施压熔体温度为650℃时

合金获得较高的综合力学性能

抗拉强度为299 MPa

伸长率达到17.5%。这主要与压力下发生凝固的液相增多导致的α-Al二次枝晶间距、第二相体积分数、铸造缺陷体积分数减小

以及"双峰组织"中的小晶粒组织体积分数增大有关。

Abstract

Effects of squeezing melt temperature on microstructure and mechanical properties of Al-5.0 Cu-0.6 Mn-0.5 Fe-0.1 Ti-0.1 RE alloy prepared by squeeze casting were investigated by tensile test

image analysis and scanning electron microscope.The results show that with the squeezing melt temperature of650 ℃

the ultimate tensile strength and elongation of the alloy reach 299 MPa and 17.5%

respectively

while those of the alloy are increased slightly with the squeezing melt temperature from 590 ℃ to650 ℃

which can be attributed to the decrease of the dendritic arm spacing ofα-Al phase

the second intermetallic phases

the volume of casting defects and the increase of volume fraction of fine structure in bi-modal structure resulted from the increase of solidification liquid phase under applied pressure.