Fabricate of Semi-solid Slurry of Al-25Si Alloy by Electromagnetic Stirring with Rotating-rod Induced Nucleation

He Zhijian; Li Lu; Zhou Rongfeng; Jiang Yehua; Zhou Rong

doi:10.15980/j.tzzz.2015.04.010

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Fabricate of Semi-solid Slurry of Al-25Si Alloy by Electromagnetic Stirring with Rotating-rod Induced Nucleation
Vol. 35, Issue 4, Pages: 369-372(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.04.010

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[1]何志坚,李璐,周荣锋,蒋业华,周荣.电磁搅拌协同转棒诱导形核制备Al-25Si合金半固态浆料[J].特种铸造及有色合金,2015,35(04):369-372.

He Zhijian, Li Lu, Zhou Rongfeng, et al. Fabricate of Semi-solid Slurry of Al-25Si Alloy by Electromagnetic Stirring with Rotating-rod Induced Nucleation. [J]. Special Casting & Nonferrous Alloys 35(4):369-372(2015)
[1]何志坚,李璐,周荣锋,蒋业华,周荣.电磁搅拌协同转棒诱导形核制备Al-25Si合金半固态浆料[J].特种铸造及有色合金,2015,35(04):369-372. DOI： 10.15980/j.tzzz.2015.04.010.

He Zhijian, Li Lu, Zhou Rongfeng, et al. Fabricate of Semi-solid Slurry of Al-25Si Alloy by Electromagnetic Stirring with Rotating-rod Induced Nucleation. [J]. Special Casting & Nonferrous Alloys 35(4):369-372(2015) DOI： 10.15980/j.tzzz.2015.04.010.

摘要

采用电磁搅拌协同转棒诱导形核法制备了Al-25Si合金半固态浆料

研究了转棒转速及搅拌电流对合金半固态显微组织的影响。结果表明

转速及电流过高或过低时

初生Si的尺寸较大且会聚集。当转速为500r/min、搅拌电流为25A时

能够获得分布均匀

尺寸约为25μm的初生Si颗粒且其边缘钝化。

Abstract

A new type of semi-solid processing method that was electromagnetic stirring with rotating-rod induced nucleation（ES-RRIN）was used to fabricate semi-solid slurry of hypereutectic Al-25 Si alloy.Effects of rotating speed and stirring current on primary Si particles（PSPs）in hypereutectic Al-25 Si alloy were investigated.The results reveal that the size of PSPs is coarsen with agglomeration to some extent at a higher or lower rotating speed and current.The primary Si size reaches approximately 25μm with spherodization and uniform distribution at 500r/min and 25 A.