采用多弯道蛇形管浇注技术制备半固态A356铝合金浆料.结果表明:在浇注温度为640～680 ℃的条件下,当弯道数量为3且直径为20 mm时,可获得形状因子F为0.72～0.85和晶粒直径D为55～75 μm的半固态浆料;当弯道数量为5且直径为20 mm时,可获得形状因子F为0.86～0.92和晶粒直径D为44～58 μm的半固态浆料;当弯道数量为5且直径为25 mm时,可获得形状因子F为0.76～0.90和晶粒直径D为48～68 μm的半固态浆料.弯道数量增加或弯道直径减小,可以改善初生α(Al)晶粒的形貌和尺寸.弯道内的合金熔体具有"自搅拌"的作用,可使初生晶核逐渐演变为球形或近球形晶粒.
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