Al-10%LaCe中间合金制备及对过共晶Al-Si合金的变质作用  

Preparation of Al-10%LaCe Master Alloy and its Modification Effect on Hypereutectic Al-Si alloy

作　　者：滕海琳 石为喜[1] 何红宇 仇正 茆俊 林业达 TENG Hailin;SHI Weixi;HE Hongyu;QIU Zheng;MAO Jun;LIN Yeda(School of Metallurgy and Materials Engineering,Liaoning Institute of Science and Technology,Benxi Liaoning 117004,China)

机构地区：[1]辽宁科技学院冶金与材料工程学院,辽宁本溪117004

出　　处：《辽宁科技学院学报》2023年第5期14-17,共4页Journal of Liaoning Institute of Science and Technology

基　　金：2024年辽宁科技学院大学生创新创业训练计划项目(202411430099);辽宁省教育厅基本科研项目(面上项目)(LJKZ1066).

摘　　要：采用混熔法制备Al-10%LaCe中间合金,并对Al-25%Si合金进行变质处理,研究不同添加量的LaCe对Al-25%Si合金的变质作用。LaCe对Al-25%Si合金中的初晶硅和共晶硅都有着比较明显的细化作用,当LaCe的添加量达到1.0%时,初晶硅组织仍呈现出不规则五瓣星状及其他较复杂形状,其晶粒尺寸细化作用明显,共晶硅由长针状变为颗粒状。X射线衍射和扫描电镜分析结果表明,在变质后的合金中生成了新的含LaCe多元相。The Al-10%LaCe intermediate alloy was prepared by the mixed fusion method and then was adopted as a modifier to refine the Al-25%Si alloy.The modification effect of different amounts of LaCe on Al-25%Si alloy was studied.The results showed that LaCe has a significant refining effect on both primary and eutectic silicon in Al-25%Si alloy.When the additive amount of LaCe reaches 1.0%,the primary silicon structure still exhibits irregular five-petal star shaped and other complex shapes,and its grain size refinement effect is obvious.Eutectic silicon changes from long-needle shaped to granular.The results of X-ray diffraction and scanning electron microscopy analysis indicated that new LaCe containing multiphase is generated in the modified alloy.

关 键 词：过共晶铝硅合金 LaCe变质 初晶硅 共晶硅 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]