Effects of the Later Processing Parameters on Phosphorus Modified Primary Silicon Phase in High Silicon Aluminum Alloy

Wu Zhibin; Zhong Gu; Qiu Chu; Li Xintao; Nagaumi Hiromi

doi:10.15980/j.tzzz.2014.01.029

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Effects of the Later Processing Parameters on Phosphorus Modified Primary Silicon Phase in High Silicon Aluminum Alloy
Vol. 34, Issue 1, Pages: 12-15(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.01.029

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[1]吴志斌,钟鼓,邱楚,李新涛,长海博文.磷变质后期工艺对高硅铝合金中初生Si的影响[J].特种铸造及有色合金,2014,34(01):12-15.

Wu Zhibin, Zhong Gu, Qiu Chu, et al. Effects of the Later Processing Parameters on Phosphorus Modified Primary Silicon Phase in High Silicon Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 34(1):12-15(2014)
[1]吴志斌,钟鼓,邱楚,李新涛,长海博文.磷变质后期工艺对高硅铝合金中初生Si的影响[J].特种铸造及有色合金,2014,34(01):12-15. DOI： 10.15980/j.tzzz.2014.01.029.

Wu Zhibin, Zhong Gu, Qiu Chu, et al. Effects of the Later Processing Parameters on Phosphorus Modified Primary Silicon Phase in High Silicon Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 34(1):12-15(2014) DOI： 10.15980/j.tzzz.2014.01.029.

摘要

借助光学显微镜和金相软件观察分析了A390铝合金中初生Si形貌

研究了熔体中实际P含量、浇注温度和冷却速度等后期工艺参数对初生Si变质效果的影响。结果表明

P显著细化初生Si

随着熔体实际P含量的增加初生Si细化效果越好;浇注温度对P变质效果也产生一定影响

浇注温度越高

P变质效果越好;冷却速率对P变质效果起关键作用

即使在优化的熔体实际P含量和浇注温度条件下

冷却速率较低时初生Si细化效果也不明显。

Abstract

Effects of later processing parameters such as the real phosphorus（P）content in melt

pouring temperature and cooling rate on the refinement of primary silicon particle in A390aluminum alloy were investigated by OM（optical microscopy）and Image Plus software.The results demonstrate that P can significantly refine primary silicon morphology

and primary Si phase size is decreased with increasing in the real P content in melt.With the increase of pouring temperature

the P modification effects is improved increasingly.Cooling rate plays a key role in P modifying primary silicon

where refinement of primary Si phase in the alloy can be neglected with the low cooling rate even under the condition of optimized P content in melt and reasonable pouring temperature.