Effect of Iron on Grain Refinement in Mg-3Al Alloys by Carbon Inoculation

Wang Chunjian

doi:10.15980/j.tzzz.2015.08.001

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Effect of Iron on Grain Refinement in Mg-3Al Alloys by Carbon Inoculation
Vol. 35, Issue 8, Pages: 785-788(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.08.001

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[1]王春建.Fe对Mg-3Al合金碳质孕育晶粒细化的影响[J].特种铸造及有色合金,2015,35(08):785-788.

Wang Chunjian. Effect of Iron on Grain Refinement in Mg-3Al Alloys by Carbon Inoculation. [J]. Special Casting & Nonferrous Alloys 35(8):785-788(2015)
[1]王春建.Fe对Mg-3Al合金碳质孕育晶粒细化的影响[J].特种铸造及有色合金,2015,35(08):785-788. DOI： 10.15980/j.tzzz.2015.08.001.

Wang Chunjian. Effect of Iron on Grain Refinement in Mg-3Al Alloys by Carbon Inoculation. [J]. Special Casting & Nonferrous Alloys 35(8):785-788(2015) DOI： 10.15980/j.tzzz.2015.08.001.

摘要

在本能晶粒细化基础上

向高纯Mg-3Al合金熔体中添加Fe元素

对粗化后的晶粒进行碳质孕育法晶粒细化处理

研究了合金凝固后的晶粒尺寸变化

并对Fe的影响机理进行分析与讨论。结果表明

随着Fe含量的增加

Mg-3Al合金的凝固晶粒尺寸呈先增大后减小的趋势;此外

Fe含量较低时

碳质孕育法处理能获得明显的晶粒细化效果

但随着Fe含量的增加

碳质孕育法细化效果逐渐衰弱

直至完全消失。分析表明

合金晶粒尺寸的变化与凝固过程中的晶核性质变化相关。

Abstract

Grain size changes of as-cast Mg-3Al alloy were investigated through adding Fe into melts then treated by carbon inoculation based on the native grain refinement

and influencing mechanism of Fe was also analyzed and discussed.The results reveal that the grain size in Mg-3Al alloy is increased firstly and then decreased with the increase of Fe.Grain refining efficiency of carbon inoculation is notable when the Fe content is low

while it is fade with Fe content increase.The influencing mechanisms of Fe element on grain size of Mg-3Al alloy is related with the characteristics of nucleuses in solidification induced by Fe.