Filling ability of semi-solid A356 aluminum alloy slurry in rheo-diecasting

Yuelong Bai~(1,2)Weimin Mao~(1)Songfu Gao~(1)Guoxing Tang~(1)Jun Xu~(2) (1)School of Materials Science and Engineering.University of Science and Technology Beijing,Beijing 100083,China (2)National Engineering Research Center for Non-ferrous Metals Composite,General Research Institute for Non-ferrous Metals,Beijing 100088,China

摘 要：<正>The effects of slurry temperature,injection pressure,and piston velocity on the rheo-filling ability of semisolid A356 al- loys were studied by the reho-diecasting methods.The results show that the slurry temperature of the semi-solid A356 aluminum al- loy has an important effect on the filling ability;the higher the slurry temperature,the better is the filling ability,and the appropriate slurry temperature for rheo-filling is in the range of 585-595℃.The injection pressure also has a great effect on the filling ability, and it is appropriate to the rheo-filling when the injection pressure is in the range of 15-25 MPa.The piston velocity also has a great effect on the filling ability,and it is appropriate to the rheo-filling when the piston velocity is in the range of 0.072-0.12 m/s.The filling ability of the slurry prepared by low superheat pouring with weak electromagnetic stirring is very good and the microstructural distribution in the rheo-formed die castings is homogeneous,which is advantageous to the high quality die casting.

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