Squeezing Casting Al-Si Alloy Components

Zhang Hui

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Squeezing Casting Al-Si Alloy Components
Vol. 31, Issue 12, Pages: 1121-1124(2011)
Published： 2011 ，
DOI：

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[1]张会.Al-Si合金挤压铸造工艺研究[J].特种铸造及有色合金,2011,31(12):1121-1124.

Zhang Hui. Squeezing Casting Al-Si Alloy Components. [J]. Special Casting & Nonferrous Alloys 31(12):1121-1124(2011)
[1]张会.Al-Si合金挤压铸造工艺研究[J].特种铸造及有色合金,2011,31(12):1121-1124. DOI：

Zhang Hui. Squeezing Casting Al-Si Alloy Components. [J]. Special Casting & Nonferrous Alloys 31(12):1121-1124(2011) DOI：

摘要

以工业ZL102合金为原材料

采用正交试验方法

研究了挤压铸造工艺参数对Al-Si合金挤压铸造件热处理前后的力学性能和显微组织的影响。结果表明

挤压铸造组织比常压金属型铸造组织细小;挤压铸造件经过热处理之后

组织比热处理前均匀

晶粒细小

抗拉强度比热处理前提高了4.5%

而伸长率在热处理前平均是0.74%

热处理后提高到1.78%;对9组试验进行分析比较

最终得出热处理后的最优方案:压力为100kPa

模具预热温度为150℃

合金浇注温度为660℃

保压时间为14s。

Abstract

Effects of squeezing casting parameters on mechanical properties and microstructure of ZL102 alloy components before and after heat treatment were investigated by orthogonal tests.The results show that grain size in the squeezed casting alloy components is finer than that in permanent mold castings.Compared with that of squeezed castings before heat treatment

the grain size in the squeezed castings after heat treatment is refined with more uniform distribution

meanwhile

tensile strength is improved by 4.5%

and elongation is increased from 0.74% to 1.78%.Through analyzing nine sets of processing parameters

the optimized processing parameters are presented as follows:pressure of 100 kPa

preheating mould at 150 ℃ and pouring at 630 ℃ as well as holding pressure for 14 s.