Effect of Casting Temperature on Microstructure and the Content of Fe and Mn Elements in AZ Series Magnesium Alloy
Author of the article:LIU Tao;WANG Xiaogang;LI Weili;ZHANG Hongfang;FENG Lulu
Author's Workplace：Shanxi Wenxi Yinguang Huasheng Magnesium Co.,Ltd.,Technology Center,Wenxi 043800,China
Key Words：casting temperature AZ Mg alloy Fe content Mn content second phase
Abstract：
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.
