Optimization Of Process Parameters On The Semisolid Slurry Of Aluminum Alloy A356

The semisolid aluminum alloy slurry of A356 is obtained by the Low SuperheatPouring Process with a Shear Field Process (LSPSF process). The orthogonalexperiment is used to devise the experiments in order to investigate the influence ofthe microstructure of semisolid slurry, which is exerted by the pouring condition(pouring temperature) and the barrel heat exchange condition (inclined degree,rotating speed) and intensity of cooling. Finally these technical parameters areoptimized. Numerical simulation of the filling process of the semisolid aluminumalloy slurry of A356 was carried out by means of the software AnyCasting in therotational barrel. The semisolid aluminum alloy slurry's distributing of temperatureand the distributing of velocity in the rotational barrel and the influences of themicrostructure of semisolid slurry exerted by these technologic parameters areanalyzed.The results showed that the lower pouring temperature and the larger inclineddegree and the faster rotating speed is adopted as long as the semisolid aluminumalloy slurry is not solidified. In case of three parameters are well matching, theeffective nucleation rate will greatly improve. At the same time the semisolidaluminum slurry is slowly cooled in the crucible, the perfect microstructure can beobtained. The experiment results show that we received the best microstructure of thesemisolid aluminum slurry when the rotating speed is 60r/min, pouring temperatureis 660℃, inclined degree is 15°and the temperature of the crucible is 500℃.