Grain refinement of primary silicon in hypereutectic Al-Si alloys by different P-containing compounds

Benson Kihono Njuguna; Jia-yan Li; Yi Tan; Qian-qian Sun; Peng-ting Li

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Grain refinement of primary silicon in hypereutectic Al-Si alloys by different P-containing compounds

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摘要

The grain refinement behavior of Si-3 P,Si-25 Mn-10 P,and Al-10 Si-2 Fe-3 P master alloys on hypereutectic Al-24 Si alloy was studied.Microstructure analysis indicates that the P-containing compounds in the three master alloys are Si P,Mn P,and Al P,respectively.The coarse flower-like primary silicon in the Al-24 Si alloy transforms into smaller,well-distributed blocks with the addition of various master alloys.When pouring at 840°C,the average grain size of the primary silicon refined by Si-25 Mn-10 P master alloy with a holding time of 30 min is about 18μm,which is significantly smaller than those refined by Si-3 P and Al-10 Si-2 Fe-3 P master alloys.The grain size shows an increasing trend when the holding time is further prolonged.Higher holding temperature has a positive effect on the grain refinement of Si-25 Mn-10 P master alloy.The grain refinement mechanism of the three master alloys was also discussed.

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来源
《中国铸造：英文版》 |2021年第1期|37-44|共8页
作者
Benson Kihono Njuguna; Jia-yan Li; Yi Tan; Qian-qian Sun; Peng-ting Li;
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作者单位

School of Materials Science and Engineering;

Dalian University of Technology;

Dalian;

116024;

China;

State Key Laboratory of Advanced Special Steel;

Shanghai University;

Shanghai;

200444;

China;

Shandong Shanda Al&Mg Melt Technology Company Limited;

Jinan;

250061;

China;

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原文格式 PDF
正文语种 chi
中图分类 TG146.21;
关键词
grain refinement; primary silicon; master alloy; AlP compound;

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7. 过共晶Al-Si合金对Al-Si合金的变质作用 [A] . 张凤巍 . 2009

Grain refinement of primary silicon in hypereutectic Al-Si alloys by different P-containing compounds

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