Co对Al-20Si-2Cu-1Ni-0.5Mn合金微观组织和力学性能的影响

沙萌; 吴树森; 王行涛

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Co对Al-20Si-2Cu-1Ni-0.5Mn合金微观组织和力学性能的影响
Effects of Co on Microstructure and Mechanical Properties of Al-20Si-2Cu-1Ni-0.5Mn Alloy
2012年32卷第1期页码：23-26
纸质出版日期： 2012 ，
DOI：

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[1]沙萌,吴树森,王行涛.Co对Al-20Si-2Cu-1Ni-0.5Mn合金微观组织和力学性能的影响[J].特种铸造及有色合金,2012,32(01):23-26.

Sha Meng, Wu Shusen, Wang Xingtao. Effects of Co on Microstructure and Mechanical Properties of Al-20Si-2Cu-1Ni-0.5Mn Alloy[J]. Special Casting & Nonferrous Alloys, 2012,32(1):23-26.
[1]沙萌,吴树森,王行涛.Co对Al-20Si-2Cu-1Ni-0.5Mn合金微观组织和力学性能的影响[J].特种铸造及有色合金,2012,32(01):23-26. DOI：

Sha Meng, Wu Shusen, Wang Xingtao. Effects of Co on Microstructure and Mechanical Properties of Al-20Si-2Cu-1Ni-0.5Mn Alloy[J]. Special Casting & Nonferrous Alloys, 2012,32(1):23-26. DOI：

摘要

采用扫描电镜（SEM）、图像定量分析软件等

研究了在Al-20Si-2Cu-1Ni-0.5Mn合金中分别添加质量分数为0.5%、0.9%、1.5%的Co对合金微观组织和力学性能的影响。结果表明

随着Co含量的增加

合金中的含Co金属间化合物的体积分数和平均直径均有所增加

其形态也由小团块状转变为发达的树枝晶。合金的力学性能随Co含量的增加逐渐降低。Co元素对于初生Si没有明显的变质作用。

Abstract

With the help of scanning electron microscopy（SEM） and quantitative photograph analysis software

the effects of Co content varied from 0 to 1.5% on microstructure and mechanical properties of Al-20Si-2Cu-1Ni-0.5Mn alloy were investigated.The results show that

the volume fraction and average diameter of Co-containing intermetallic compounds are increased with the increase of Co content.Meanwhile

the morphology of Co-containing phases is converted from small bulky structure to well-developed dendrites.The addition of Co has a worse effect on the tensile strength of the hypereutectic Al-Si alloy.In addition

the modification effects of Co content on primary Si in the alloy can be ignored.