Semi-solid characteristics and thixoforming of hypereutectic Al-Si alloy

来源期刊：中国有色金属学报(英文版)2000年第3期

论文作者：刘昌明 何乃军 李华基

文章页码：309 - 313

Key words：hypereutectic Al-Si alloy; primary Si crystals; thixoforming

Abstract: Effects of processing parameters on microstructure evolutions by mechanical stirring, procedures for obtaining thixotropy in semi-solid slurries, and procedure for thixoforging component, were investigated in hypereutectic Al-Si alloy. It is shown that 605℃was the proper temperature for stirring treatment of this alloy, at which the coarse and plate primary Si crystals were effectively changed to globular crystals with a mean diameter of 200μm after 50min stirring, that billets with excellent thixotropy were obtained after 50min remelting at 575℃, in which solid fraction of matrix and primary Si crystals was about 60%, and that a perfect near net shape component of disc casting was obtained by thixoforging.