Effects of Mixing Ratio and Temperature on Primary α-Al Phase in 7075 Alloys Fabricated by Controlled Diffusion Solidification

Yang Xiong; LI Yuandong; Li Ming; Cai Qiyong; Ma ying

doi:10.15980/j.tzzz.2017.03.026

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Effects of Mixing Ratio and Temperature on Primary α-Al Phase in 7075 Alloys Fabricated by Controlled Diffusion Solidification
Vol. 37, Issue 3, Pages: 330-334(2017)
Published： 2017 ，
DOI： 10.15980/j.tzzz.2017.03.026

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[1]杨雄,李元东,李明,蔡其勇,马颖.混合比和温度对受控扩散凝固制备7075铝合金初生α-Al相的影响[J].特种铸造及有色合金,2017,37(03):330-334.

Yang Xiong, LI Yuandong, Li Ming, et al. Effects of Mixing Ratio and Temperature on Primary α-Al Phase in 7075 Alloys Fabricated by Controlled Diffusion Solidification. [J]. Special Casting & Nonferrous Alloys 37(3):330-334(2017)
[1]杨雄,李元东,李明,蔡其勇,马颖.混合比和温度对受控扩散凝固制备7075铝合金初生α-Al相的影响[J].特种铸造及有色合金,2017,37(03):330-334. DOI： 10.15980/j.tzzz.2017.03.026.

Yang Xiong, LI Yuandong, Li Ming, et al. Effects of Mixing Ratio and Temperature on Primary α-Al Phase in 7075 Alloys Fabricated by Controlled Diffusion Solidification. [J]. Special Casting & Nonferrous Alloys 37(3):330-334(2017) DOI： 10.15980/j.tzzz.2017.03.026.

摘要

采用受控扩散凝固（CDS）技术制备7075铝合金。研究了不同母合金成分（混合比）与不同混合温度对7075铝合金凝固组织中初生α-Al相尺寸、形貌及分布的影响。结果表明

当母合金混合比例为1∶1且浇注温度为637℃时

混合后能够得到最佳的金相组织

其初生α-Al相平均尺寸达到91.70μm

形状因子达到2.56。分析表明

相同混合温度下Al-ZnMg-Cu母合金中Zn-Mg-Cu含量越低

细化效果越好。在相同混合成分和混合比浇注时

混合温度越低

其初生α-Al相越细小圆整。

Abstract

The 7075 alloy was fabricated by controlled diffusion solidification（CDS）technology

and effects of precursor alloying component and mixing methods on size

morphology and distribution of the primaryα-Al phase in 7075 alloy were investigated.The results show that the primaryα-Al phase has the desirable shape when the mixing ratio is 1∶1at 637 ℃

where average size of the primaryα-Al reaches 91.70μm with shape factor of 2.56.The analysis reveals that at the fixed mixing temperature

the refining effect is improved with decreasing in the component of Al-Zn-Mg-Cu

while at the fixed mixing ratio

with decreasing in the pouring temperature

the primaryα-Al becomes fine and spheroidization.