Effects of Rotating-rod Induced Nucleation Method on the Fe-rich Inter-metallic Phase in Hypereutectic Al-Si Alloy

Li Yongkun; Li Lu; Zhou Rongfeng; Jiang Yehua; Lu Dehong; He Zhijian

doi:10.15980/j.tzzz.2017.02.010

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Effects of Rotating-rod Induced Nucleation Method on the Fe-rich Inter-metallic Phase in Hypereutectic Al-Si Alloy
Vol. 37, Issue 2, Pages: 152-155(2017)
Published： 2017 ，
DOI： 10.15980/j.tzzz.2017.02.010

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[1]李永坤,李璐,周荣锋,蒋业华,卢德宏,何志坚.转棒诱导形核法对高硅铝合金中富Fe相的影响[J].特种铸造及有色合金,2017,37(02):152-155.

Li Yongkun, Li Lu, Zhou Rongfeng, et al. Effects of Rotating-rod Induced Nucleation Method on the Fe-rich Inter-metallic Phase in Hypereutectic Al-Si Alloy. [J]. Special Casting & Nonferrous Alloys 37(2):152-155(2017)
[1]李永坤,李璐,周荣锋,蒋业华,卢德宏,何志坚.转棒诱导形核法对高硅铝合金中富Fe相的影响[J].特种铸造及有色合金,2017,37(02):152-155. DOI： 10.15980/j.tzzz.2017.02.010.

Li Yongkun, Li Lu, Zhou Rongfeng, et al. Effects of Rotating-rod Induced Nucleation Method on the Fe-rich Inter-metallic Phase in Hypereutectic Al-Si Alloy. [J]. Special Casting & Nonferrous Alloys 37(2):152-155(2017) DOI： 10.15980/j.tzzz.2017.02.010.

摘要

研究了转棒诱导形核法制备半固态合金浆料

探讨了转棒诱导形核法对高Si铝合金半固态显微组织的影响

初步探讨了转棒诱导形核法对富Fe相形貌的影响机理。结果表明

转棒诱导形核法对合金组织中的富Fe相细化效果明显

其等效直径从常规铸造的170

50μm细化至39μm左右

富Fe相主要为δ-Al4FeSi2相。当转棒转速为500r/min时

熔体在转棒上能最大程度地铺展

使熔体有一个较大且均匀的过冷度

对富Fe相具有最佳的细化效果。

Abstract

A new type of semi-solid processing method that is rotating-rod induced nucleation（RRIN）was used to fabricate semi-solid slurry.The effects of RRIN method on Fe-rich inter-metallic phase in hypereutectic Al-Si alloy were investigated.The mechanism of RRIN refining the inter-metallic phase in alloy microstructure was described.The results reveal that the inter-metallic phase can be refined effectively by RRIN

and its equivalent diameter is reduced to about 39μm from 170

50μm in as-cast microstructure

and composition of the inter-metallic phase presents asδ-Al4FeSi2.With the rotating speed at 500r/min

the melt spreads around the surface of the rod as much as possible

so the melt can obtain a large and uniform degree of supercooling

where RRIN exhibits the desirable refinement for the Fe-rich inter-metallic phase.