Effects of Pulsed Magnetic Field and Modification on Primary Mg<sub>2</sub>Si Phase in 20Mg<sub>2</sub>Si/Al Composites

Tan Zhenlin; Zhou Quan; Wu Han; Yang Chenggang

doi:10.15980/j.tzzz.2020.01.023

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Effects of Pulsed Magnetic Field and Modification on Primary Mg₂Si Phase in 20Mg₂Si/Al Composites
Vol. 40, Issue 1, Pages: 96-100(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.01.023

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[1]谭震林,周全,吴晗,杨成刚.脉冲磁场与变质处理对20Mg_2Si/Al复合材料中初生Mg_2Si相的影响[J].特种铸造及有色合金,2020,40(01):96-100.

Tan Zhenlin, Zhou Quan, Wu Han, et al. Effects of Pulsed Magnetic Field and Modification on Primary Mg₂Si Phase in 20Mg₂Si/Al Composites. [J]. Special Casting & Nonferrous Alloys 40(1):96-100(2020)
[1]谭震林,周全,吴晗,杨成刚.脉冲磁场与变质处理对20Mg_2Si/Al复合材料中初生Mg_2Si相的影响[J].特种铸造及有色合金,2020,40(01):96-100. DOI： 10.15980/j.tzzz.2020.01.023.

Tan Zhenlin, Zhou Quan, Wu Han, et al. Effects of Pulsed Magnetic Field and Modification on Primary Mg₂Si Phase in 20Mg₂Si/Al Composites. [J]. Special Casting & Nonferrous Alloys 40(1):96-100(2020) DOI： 10.15980/j.tzzz.2020.01.023.

摘要

对比研究了未处理、脉冲磁场处理及脉冲磁场-变质剂复合处理对20Mg2Si/Al复合材料中初生Mg2Si相形貌和分布的影响

同时研究了复合处理条件下

不同磁场电压和频率对初生Mg2Si相的影响。结果表明

磁场处理和复合处理条件下

Mg2Si相尺寸均有所减小;试样从心部到边部

Mg2Si相体积分数逐渐增加

呈梯度分布

但复合处理后

Mg2Si相的梯度分布效果减弱。当磁场电压在0～300V范围内或磁场频率在1～10Hz范围内

随着磁场电压或频率增加

Mg2Si相的尺寸均先增加后减小

转折点分别为200V和5Hz

其梯度分布效果总体上逐渐减弱。试样耐磨性和硬度的变化规律与Mg2Si相的体积分数基本保持一致。

Abstract

Effects of untreated

magnetic field treatment

compound treatment of magnetic field and modifier on morphology and distribution of primary Mg

Si phase in 20 Mg2Si/Al composites were investigated.Effects of different voltage and frequency of magnetic field on primary Mg

Si phase with compound treatment were also described.The results reveal that the size of Mg

Si phase is decreased with magnetic field treatment or compound treatment

and the volume fraction of Mg

Si phase is increased gradually from the center to the edge of samples

showing gradient distribution

however the gradient distribution effect of Mg

Si phase is decreased after compound treatment.When the voltage is in the range of 0～300 Vor the frequency is in the range of 1～10 Hz

with the increase of the voltage or frequency

the size of Mg

Si phase is increased at first and then decreased

where the turning points are 200 Vand 5 Hz

respectively

and the gradient distribution effect is decreased gradually.The variation of wear resistance and hardness of the specimens is basically consistent with the volume fraction of Mg

Si phase.