Zn对压铸Al-Si合金共晶Si的粗化及粗化后变质处理

韩盼文; 袁灵洋; Ghulam Asghar; 刘保良; 胡志恒; 付彭怀; 彭立明

doi:10.15980/j.tzzz.2021.04.020

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Zn对压铸Al-Si合金共晶Si的粗化及粗化后变质处理
Coarsening of Eutectic Si in Die-casting Al-Si Alloy by Zn and Modification Treatment after Coarsening
2021年41卷第4期页码：483-489
纸质出版日期： 2021 ，
DOI： 10.15980/j.tzzz.2021.04.020

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[1]韩盼文,袁灵洋,Ghulam Asghar,刘保良,胡志恒,付彭怀,彭立明.Zn对压铸Al-Si合金共晶Si的粗化及粗化后变质处理[J].特种铸造及有色合金,2021,41(04):483-489.

Han Panwen, Yuan Lingyang, Ghulam Asghar, et al. Coarsening of Eutectic Si in Die-casting Al-Si Alloy by Zn and Modification Treatment after Coarsening[J]. Special Casting & Nonferrous Alloys, 2021,41(4):483-489.
[1]韩盼文,袁灵洋,Ghulam Asghar,刘保良,胡志恒,付彭怀,彭立明.Zn对压铸Al-Si合金共晶Si的粗化及粗化后变质处理[J].特种铸造及有色合金,2021,41(04):483-489. DOI： 10.15980/j.tzzz.2021.04.020.

Han Panwen, Yuan Lingyang, Ghulam Asghar, et al. Coarsening of Eutectic Si in Die-casting Al-Si Alloy by Zn and Modification Treatment after Coarsening[J]. Special Casting & Nonferrous Alloys, 2021,41(4):483-489. DOI： 10.15980/j.tzzz.2021.04.020.

摘要

通过微观组织观察和力学性能测试等手段

研究了Zn对压铸Al-10Si-0.3Mg-0.6Mn合金的影响

在此基础上进行Sr和RE的变质处理

获得了一种综合性能良好的压铸铝合金。结果表明

Zn的固溶强化使合金的强度提升

但原来细小的共晶Si变得粗大

出现长条状和块状的Si

合金伸长率下降。加入0.04%的Sr和0.1%的La/Ce混合稀土使粗化的共晶Si重新细化

最终获得合金的屈服强度为167 MPa、抗拉强度为324 MPa、伸长率为10.2%。

Abstract

The effects of Zn on die casting Al-10Si-0.3Mg-0.6Mn alloy were investiagted by means of microstructure observation and tensile test.On this basis

a kind of die casting aluminum alloy with good comprehensive properties was prepared by adding Sr and RE.The experimental results reveal that the addition of Zn can improve the strength of the alloy with the decrease of elongation

however the fine eutectic Si become coarser

and long strip and massive Si can be observed.The coarsened eutectic silicon can be refined again with 0.04% Sr and 0.1% La/Ce mixed rare earth

where the yield strength

tensile strength and elongation of the alloy reach up to 167 MPa

324 MPa and 10.2%

respectively.