不同过热温度控制及混合方式对过共晶Al-Si合金初生Si的影响  

Effect of Different Overheating Temperature and Mixing Ways on Primary Silicon of Al-Si Alloys

作　　者：刘福禄[1,2] 

机构地区：[1]四川师范大学,四川成都610000 [2]重庆工贸职业技术学院,重庆408000

出　　处：《铸造技术》2014年第8期1784-1787,共4页Foundry Technology

摘　　要：通过受控扩散凝固技术制备了含Si量不同的Al-Si合金,研究不同过热温度和混合方式对过共晶Al-Si合金初生Si相的影响。研究表明：随着Al-25Si过热温度的增加,初生Si相尺寸和长宽比减小,组织分布更为均匀;采用液-液混合方式初生Si相的效果比较好;随着Al-Si合金中Si含量的减小,初生Si相尺寸减小。The Al-Si alloys were prepared by diffusion-controlled solidification technology, the effects of superheat temperature and mixed methods on primary Si phase of Al-Si eutectic alloy were studied. The results show that, with the increase of Al-25Si overheating temperature, the size and aspect ratio of primary Si phase is reduced, microstructure distribution is more uniform. The primary Si phase is better when using liquid-liquid mixing. With the decrease of Si content in Al-Si alloys, the size of primary Si phase reduces.

关 键 词：过热温度 受控扩散凝固技术 液-液混合 

分 类 号：TG292[金属学及工艺—铸造]