Effect of Power Supply Parameters and Cold Crucible Structure on Al-Sc Alloy Melt under Levitation Smelting
In order to study the effect of process parameters on the magnetic field,temperature and flow of the melt in the suspension smelting process of high scandium content Al-scandium alloy,and realize the preparation of homogeneous structure,the suspension smelting process was simulated by COMSOL Multiphysics software,and the effects of different power supply parameters and cold crucible structure on melt melting were studied.The results show that the magnetic induction lines enter the interior of the crucible through slits,and the magnetic field intensity at the bottom is much larger than that in the middle of the crucible.Increasing the current intensity and the number of crucible slits will strengthen the magnetic field inside the crucible,while increasing the current frequency will weaken the internal magnetic field and reduce the heating efficiency.Increasing the current will increase the flow rate and temperature at all position of the melt,increasing the frequency will increase the levitation force and temperature,decrease the flow rate,and the flow rate of the counterclockwise stirring will decrease more.The melting process scheme obtained according to the simulation results is using 24 split crucible,current of 400 A and frequency of 10 kHz.Under this process,Al-23%Sc alloy with uniform composition is prepared.
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