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制备了半固态A356铝合金熔体,在自主设计的阿基米德螺旋线试验模具中挤压成形,利用螺旋线试样研究了充型能力。通过控制制备工艺参数得到不同的固相率和形状因子,研究了不同的固相率和形状因子对流变充型能力的影响。结果表明,在相同的工艺参数条件下,固相率变化对半固态铝合金熔体流变充型能力的影响大于形状因子的变化影响。流变充型能力随着固相率的增加而显著减小,随着形状因子的减小而增大。
A semi-solid A356 aluminum alloy melt was prepared and extruded in a self-designed Archimedean spiral test mold. The filling ability was investigated using a spiral specimen. The different solid fraction and shape factor were obtained by controlling the preparation process parameters. The effects of different solid fraction and shape factor on rheological chargeability were studied. The results show that under the same process parameters, the influence of solid fraction on the rheological charge of semisolid aluminum alloy melt is larger than the change of shape factor. The rheological chargeability decreases remarkably with the increase of solid fraction and increases with the decrease of shape factor.