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CAST BAR OF AN ALUMINUM ALLOY FOR WROUGHT PRODUCTS, HAVING IMPROVED MECHANICAL PROPERTIES AND WORKABILITY, AS WELL AS PROCESS FOR PRODUCING THE SAME
CAST BAR OF AN ALUMINUM ALLOY FOR WROUGHT PRODUCTS, HAVING IMPROVED MECHANICAL PROPERTIES AND WORKABILITY, AS WELL AS PROCESS FOR PRODUCING THE SAME
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机译：加工产品用铝合金的铸锭，其机械性能和加工性得到改善，并且其生产工艺也得到改善
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摘要
A CAST BAR OF AN ALUMINUM ALLOY FOR WROUGHT PRODUCTS,HAVING IMPROVED MECHANICAL PROPERTIES ANDWORKABILITY, AS WELL AS PROCESS FORPRODUCING THE SAMEABSTRACTIn AA standard 4000 series aluminum base alloysfor wrought products, the large-sized products have beenusually produced using large billets which had non-uniform cast structure, and the small-sized products havebeen usually produced by using extruded bars which had adisadvantageous directional property. The continuouslycast bar of aluminum base alloys for wrought productaccording to the present invention: is of homogeneousstructure; is free of defects; exhibits excellentmechanical properties, and; can be subjected, as cast orafter a heat, treatment, to a working operation such asforging. A critical value of the secondary dendrite armspacing (DAS) and a critical value of the size of secondphase particles and/or the grain diameter, which criticalvalues are substantially lower than those in theconventional aluminum alloy ingot, are responsible for finecast structure capable of remarkably enhancing theworkability and the mechanical properties of the aluminumbase alloys having the following compositions.AA 4000 Al-Si-Mg series alloy: 4-12% Si; 0.6-1.3%Mg, and; balance Al.AA 4000 Al-Si-Cu-Mg series alloy: 2-12% Si;1.5-5.0% Cu; 0.8-1.3% Mg, and balance Al.
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