Abstract
Series of Al–P master alloys including binary Al–P and Al–Si/Zr–P master alloys containing pre-formed phosphides have been developed. Hypereutectic A390 alloys have shown fast refinement response to the addition of series of Al–P master alloys. After refined at 780°C for 30 min, the coarse primary Si can be refined obviously from 90 μm to less than 20 μm. In addition, the morphologies of primary Si are changed from coarse polygon to near-sphere shape, and the distribution is improved simultaneously.
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