Solidification Structure of Pb-Sn Alloy in Rotating Magnetic Field

Gao Wenshuai; Chen Changle; Chen Zhao; Zhu Jianhua

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Solidification Structure of Pb-Sn Alloy in Rotating Magnetic Field
Issue 3, Pages: 176-179(2008)
Published： 2008 ，
DOI：

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[1]高文帅,陈长乐,陈钊,朱建华.旋转磁场作用下Pb-Sn合金的凝固组织[J].特种铸造及有色合金,2008(03):176-179+160.

Gao Wenshuai, Chen Changle, Chen Zhao, et al. Solidification Structure of Pb-Sn Alloy in Rotating Magnetic Field. [J]. Special Casting & Nonferrous Alloys (3):176-179(2008)
[1]高文帅,陈长乐,陈钊,朱建华.旋转磁场作用下Pb-Sn合金的凝固组织[J].特种铸造及有色合金,2008(03):176-179+160. DOI：

Gao Wenshuai, Chen Changle, Chen Zhao, et al. Solidification Structure of Pb-Sn Alloy in Rotating Magnetic Field. [J]. Special Casting & Nonferrous Alloys (3):176-179(2008) DOI：

摘要

采用自行设计的旋转磁场

研究了在不同转速和不同磁感应强度下旋转磁场对Pb-45Sn亚共晶和Pb-64Sn过共晶合金凝固组织的影响

并与常规条件下的凝固组织进行对比。试验结果表明

对Pb-45Sn亚共晶

旋转磁场可以明显的碎断枝晶

细化晶粒;对Pb-64Sn过共晶

旋转磁场可以消除常规条件下的重力偏析

枝晶间的共晶组织被粗化

并有团状组织生成。试验发现

随着磁感应强度和转速的增大

Pb-45Sn亚共晶和Pb-64Sn过共晶凝固组织中等轴晶的数目均增多。

Abstract

Solidification structures of hypereutectic Pb-45Sn alloy and hypoeutectic Pb-64Sn in rotating magnetic field with different rotating velocity and magnetic flux density were observed based on a self-designed rotating magnetic field apparatus

and were compared with those of alloy in conventional condition.The results reveal that the rotating magnetic fileld can greatly refine grain size in the hypereutectic Pb-45Sn alloy due to broken dendrite while it can coarsen the eutectic structure in inter-dendrite with the creation of bulk structure due to suppressing the gravity-induced macro-segregation.In addition

with the increase of both magnetic flux density and rotating velocity

the numbers of equiaxed grain in solidification structure of both hypereutectic Pb-45Sn alloy and hypoeutectic Pb-64Sn alloy are increased.