在不同的过热度和电磁搅拌下制备了5％ Mg2Si(质量分数)颗粒增强亚共晶Al-Si基复合材料,并研究了浇注温度(过热度)和电磁搅拌对初生α-Al、(α-Al+Mg2Si)共晶团和共晶Mg2Si形貌和尺寸大小的影响.结果表明,低过热度与电磁搅拌结合的工艺不仅能够细化初生α-Al、(α-Al+Mg2Si)共晶团的尺寸,促进它们非枝晶组织的形成,而且还细化了共晶Mg2Si,改变了(α-Al+Mg2Si)两元共晶的形核方式,从普通铸造条件下在初生α-Al上形核转变为低过热度与电磁搅拌下的初生α-Al晶间形核.
参考文献
| [1] | Jiang QC;Wang HY;Wang Y;Ma BX;Wang JG .Modification of Mg2Si in Mg-Si alloys with yttrium[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):130-135. |
| [2] | Qin QD;Zhao YG;Cong PJ;Zhou W;Xu B .Semisolid microstructure of Mg2Si/Al composite by cooling slope cast and its evolution during partial remelting process[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1/2):99-103. |
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