Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 137, Issue 1-3, Pages 195-200Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0924-0136(02)01075-0
Keywords
semi-solid metal; AlSi7Mg alloy; electromagnetic stirring; partial remelting; die casting
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The non-dendritic primary phase is required for the production of parts through the semi-solid metal forming process, for which the spherical phase is the most favored. Under the condition of continuous casting with electromagnetic stirring, the primary phase tends to be rosette-like. For AlSi7Mg alloy, there are three possible aspects contributing to the formation of the rosette alpha phase. The billets can be reheated to their semi-solid state reliably and repeatedly through a two-phase heating procedure using a vertical tube furnace. The workable temperature is around 577-580 degreesC. For demonstration, the connecting rods for an air compressor were fabricated successfully through the semi-solid forming process using a 350 t high-pressure die casting unit. (C) 2002 Published by Elsevier Science B.V.
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