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浇铸温度对AZ系镁合金中Fe、Mn元素含量及微观组织的影响
Effect of Casting Temperature on Microstructure and the Content of Fe and Mn Elements in AZ Series Magnesium Alloy
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- DOI:
- 作者:
- 刘涛 王小刚 李伟莉 张红芳 冯露露
LIU Tao;WANG Xiaogang;LI Weili;ZHANG Hongfang;FENG Lulu
- 作者单位:
- 山西闻喜银光华盛镁业股份有限公司技术中心
Shanxi Wenxi Yinguang Huasheng Magnesium Co.,Ltd.,Technology Center,Wenxi 043800,China
- 关键词:
- 浇铸温度 AZ镁合金 Fe、Mn含量 第二相
casting temperature AZ Mg alloy Fe content Mn content second phase
- 摘要:
- 为控制镁合金中杂质元素Fe及合金元素Mn的含量,本文通过控制浇铸温度的变化,探究AZ31、AZ61镁合金中Fe、Mn元素含量及微观组织的变化情况。研究结果发现,降低浇铸温度可以有效控制Fe、Mn元素的含量,最佳浇铸温度在630~680℃之间,Fe含量可以降低到20×10^-6以下;随着浇铸温度的降低,第二相体积分数及形态发生变化;AZ61合金中形成的难溶第二相(Al-Mn-Fe)比AZ31合金中要少。因此,适当降低浇铸温度可以有效控制镁合金中杂质元素Fe的含量,从而提升镁合金基体的耐腐蚀性。In order to control the content of impurity elements Fe and Mn in magnesium alloy,the content and microstructure of impurity elements Fe and Mn in AZ31 and AZ61 magnesium alloy were studied by controlling the change of casting temperature.The results show that the content of Fe and Mn could be effectively controlled by lowering the casting temperature.The optimal casting temperature is 630~680℃,and the content of Fe could be reduced to less than 20×10^-6.With the decrease of casting temperature,the volume fraction and shape of the second phase change.Less insoluble second phase(Al-Mn-Fe)is formed in AZ61 alloy than AZ31 alloy.Therefore,decreasing the casting temperature can effectively control the content of Fe,which can improve the corrosion resistance of magnesium alloy matrix.