摘要
利用Al-30%Fe中间合金对工业纯铝进行了细化试验,研究了Fe在工业纯铝晶粒细化过程中的作用。试验结果表明,0.2%～1.2%的Al-Fe中间合金的加入对工业纯铝有不同程度的细化作用,随加入量的增大,晶粒尺寸呈减小趋势。EDAX分析证明,晶界上片状物为Fe-Al相。分析认为,由于Fe引起的成分过冷促进了形核数目的增加,FeAl3相的钉扎晶界作用阻碍了凝固过程中α-Al晶粒的进一步长大,从而引起晶粒的细化。
Grain refinement of commercial purity aluminum with AI-Fe master alloy was mvestlgatea. Macrography observation indicates that A1-Fe master alloy as grain refiner can refine the structure of commercial purity aluminum effectively during solidification. With the addition of A1-Fe master alloy into commercial purity aluminum, which content between 0.2wt%- 1.2wt%, the equiaxed grain can be obtained. Within the scope of experimental addition of A1-Fe master alloy, the more the addition is, the finer the equiaxed grains are. The EDAX result shows that the laminar morphology observed on grain boundary is A1-Fe intermetallies which are fi＇om eutectic solidification processing. It can be concluded that the grain refinement of commercial purity aluminum attributes to the constitutional supercooling caused by Fe concentration and the FeA13 phase restraining further growth of primary ct-Al by pinning effect on grain boundaries.
出处
《铸造技术》
CAS
北大核心
2013年第8期974-976,共3页
Foundry Technology
