低温铸造法制备过共晶铝硅合金坯料的研究

Study on the Preparation of Hypereutectic Al-Si Alloy Billets by Low Temperature Casting

提出利用低温铸造法进行半固态成形坯料的制备,研究了不同浇注温度下Al 20%Si合金组织形态的差异,讨论了通入CO2气体对初生硅颗粒形状、大小的影响及作用机理。结果表明,采用低温铸造法可以获得初生硅颗粒细小、分布均匀的过共晶铝硅合金坯料。

In this paper, low temperature casting method is introduced to prepare semisolid metal forming billets. For Al20%Si alloy billets, The influence of pouring temperature on the shape and the size of primary silicon particles is discussed. And the effect of the introduce of CO2 on primary silicon particles is also analyzed. Result shows that the billets with fine primary silicon particles and homogeneous particle distribution is suitable for semisolid metal forming, and it can be fabricated via low temperature casting method.