电磁搅拌下电流突变对磁场及半固态A356铝合金组织的影响

洪鑫; 刘政; 张课微; 唐景洪

doi:10.15980/j.tzzz.2021.11.014

研究·半固态加工 | 浏览量 : 0 下载量: 36 CSCD: 0

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电磁搅拌下电流突变对磁场及半固态A356铝合金组织的影响
Effects of Current Mutation on Electromagnetic Field and Solidified Microstructure in Semi-solid A356 Aluminum Alloy under Electromagnetic Stirring
2021年41卷第11期页码：1393-1399
纸质出版日期： 2021 ，
DOI： 10.15980/j.tzzz.2021.11.014

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洪鑫, 刘政, 张课微, 等. 电磁搅拌下电流突变对磁场及半固态A356铝合金组织的影响[J]. 特种铸造及有色合金杂志, 2021,41(11):1393-1399.

Hong Xin, Liu Zheng, Zhang Kewei, et al. Effects of Current Mutation on Electromagnetic Field and Solidified Microstructure in Semi-solid A356 Aluminum Alloy under Electromagnetic Stirring[J]. Special Casting & Nonferrous Alloys, 2021,41(11):1393-1399.
洪鑫, 刘政, 张课微, 等. 电磁搅拌下电流突变对磁场及半固态A356铝合金组织的影响[J]. 特种铸造及有色合金杂志, 2021,41(11):1393-1399. DOI： 10.15980/j.tzzz.2021.11.014.

Hong Xin, Liu Zheng, Zhang Kewei, et al. Effects of Current Mutation on Electromagnetic Field and Solidified Microstructure in Semi-solid A356 Aluminum Alloy under Electromagnetic Stirring[J]. Special Casting & Nonferrous Alloys, 2021,41(11):1393-1399. DOI： 10.15980/j.tzzz.2021.11.014.

摘要

基于ANSYS 17.0软件研究了搅拌电流突变行为以及不同的电磁频率下电流突变对磁感应强度、洛伦兹力和半固态铝合金熔体初生相的影响。结果表明

相同的突变电流下

洛伦兹力和磁感应强度随着电磁频率的增大先增大后减小

在25 Hz时达到最大值;相同的电磁频率下

洛伦兹力和磁感应强度随着搅拌电流突变幅值的增大而增大

在2 A突变至6 A时达到最大值。当电磁频率为25 Hz和突变电流从2 A到6 A的情况下

初生相的形状因子和平均等积圆直径分别为0.71、118μm

达到最佳。

Abstract

Based on numerical simulation methods

a two-dimensional electromagnetic field finite element model of aluminum alloy melt was established

and the effects of current mutation and different electromagnetic frequency on the magnetic induction intensity

electromagnetic force and primary phase of semi-solid aluminum alloy melt were investigated. The results reveal that under the same current mutation

the electromagnetic force and magnetic induction intensity are firstly increased and then decreased with the increase of the electromagnetic stirring frequency

reaching the maximum value at 25 Hz. Under the same electromagnetic frequency

the electromagnetic force and magnetic induction intensity are increased with the increase of the amplitude of current mutation

and the maximum value appears when current mutates from 2 A to 6 A. In the case of the optimal stirring frequency（25 Hz） and the mutation current（2～6 A）

the shape factor and average equal-area circle diameter of the primary phase are 0.71 and 118 μm

respectively.