Effect of Rare Earth on the Fluidity of Al-Cu Alloy
Author of the article:WANG Mingjie;DONG Ying;ZHANG Guowei
Author's Workplace：School of Material Science and Engineering,North University of China,Taiyuan 030051,China
Key Words：ZL205A fluidity concentric trihelical alloy fluidity tester stop flow mechanism
Abstract：
The influence of La, Ce and temperature on the fluidity of ZL205 A alloy was studied by concentric three-helix alloy fluidity tester and orthogonal experimental method. The flow stopping mechanism of Al-Cu alloy was analyzed by fracture morphology. The results show that the fluidity of ZL205 A alloy is positively correlated with casting temperature,and the fluidity of ZL205 A alloy is significantly increased with the addition of rare earth elements La and Ce. When the melting temperature is 720 ℃, rare earth Ce content is 0.1%, the La content is 0.2% when ZL205 A alloy flow length is980 mm;The addition of La and Ce shortens the solidification interval of the alloy, plays the role of heterogeneous nucleation, and improves the fluidity due to the fine grain size.
