Hypereutectic aluminium-silicon alloy product for semi-solid forming

摘要

This invention relates to a eutectic or hypereutectic aluminium-silicon alloy product suitable for thixoforming, comprising (by weight) 10 to 30% silicon and, if applicable, copper (10%), magnesium (3%), manganese (2%), iron (2%), nickel (4%), cobalt (3%) and other elements (0.5% each and 1% in total), the microstructure of which is composed of primary silicon crystals, equiaxed type aluminium dendrites less than 4 mm in size and a eutectic composed of eutectic silicon grains and eutectic aluminium grains less than 4 mm in size.