(中北大学 材料科学与工程学院，太原 030051)
摘 要: 采用蛇形通道法制备ZL101铝合金半固态浆料，研究浇注温度、弯道数量、蛇形通道温度对ZL101铝合金半固态浆料显微组织的影响。结果表明:浇注温度在630~680 °C范围时可获得满意的ZL101铝合金半固态浆料，随浇注温度的降低，初生α(Al)由蔷薇状向近球状或球状组织演变。在相同浇注温度下，弯道数量增加，可以改善初生α(Al)晶粒的形貌，降低晶粒尺寸。当蛇形通道温度提高时，通过降低浇注温度，同样可以获得合格的半固态浆料。弯道内的合金熔体具有“自搅拌”作用，使初生晶核演变为球状或近球状晶粒。
关键字: ZL101铝合金；半固态；浆料；蛇形通道
（School of Materials Science and Engineering, North University of China, Taiyuan 030051, China）
Abstract:Semi-solid slurry of ZL101 aluminum alloy was prepared using serpentine channel. The influences of the pouring temperature, the number of curves and the serpentine channel temperature on the microstructure of semi-solid ZL101 aluminum alloy were investigated. The results show that, satisfied semi-solid slurry of ZL101 aluminum alloy was prepared with pouring at 630-680 °C. The morphology of primary α(Al) grains transforms from rosette to spheroid with the decrease of pouring temperature. At the same pouring temperature, increasing the number of curves can improve the morphology of primary α(Al) grains and decrease the grain size. Qualified slurry can be attained with lowering the pouring temperature when the serpentine channel temperature is higher. The alloy melt has the effect of “self-stirring” in the serpentine channel, which can make the primary nuclei gradually evolve into spherical and near-spherical grains.
Key words: ZL101 aluminum alloy; semi-solid; slurry; serpentine channel
