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1.引言近年来,稀土金属作为一种有益的添加剂应用于有色合金中,已经引起了人们的极大兴趣。稀土添加剂可细化组织,改善合金的力学性能及机械加工性能。同时,还在Al-Si合金中作为一种变质剂。Sharan和他的同事对其进行了广泛深入地研究,并将其实验结果先后进行讨论。2.稀土在铝及其合金中作晶粒细化剂Sharan和Anantharaman研究了混合稀土对铝及其两种铸造合金122、218性能的影响。分别在Al中添加2-3％和在122合金中添加1％的混合稀土,取得了明显的细化结果。添加2-3％稀土可以提高122合
1. Introduction In recent years, rare earth metals as a useful additive in non-ferrous alloys have attracted great interest. Rare earth additives can refine the organization to improve the mechanical properties and mechanical properties of the alloy. At the same time, Al-Si alloy is also used as a modifier. Sharan and his colleagues conducted extensive and in-depth research and discussed their experimental results one after the other. 2. Rare Earth as Grain Refiner in Aluminum and Its Alloys Sharan and Anantharaman studied the effect of mischmetal on the properties of aluminum and its two cast alloys, 122,218. Al-added 2-3% and Al-added 1% rare earth mixed in the 122 alloy, and achieved significant refinement results. Adding 2-3% rare earth can increase 122 合