软接触电磁连铸铝硅共晶合金凝固组织研究  

Study on Solidification Structure of Eutectic Al-Si Alloys by Soft-Contact Electromagnetic Continuous Casting

作　　者：刘超[1] 李丘林[2] 张志清[1] 刘伟[1] 

机构地区：[1]清华大学材料科学与工程系,北京100084 [2]清华大学深圳研究生院,广东深圳518055

出　　处：《稀有金属材料与工程》2007年第A03期448-450,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基资助项目(50474048)

摘　　要：采用软接触电磁连续铸造的方法制备铝硅共晶合金空心管坯,研究了电磁场对合金凝固组织的影响。结果表明,与传统连续铸造的铝硅共晶合金微观组织相比,施加电磁场后凝固组织中α-Al相得到细化,出现了颗粒状初生硅相;随着磁场强度的增加,初生硅的含量减少、平均尺寸减小,形状有球化趋势。Eutectic Al-Si alloys tubes were prepared by soft-contact electromagnetic continuous casting. The effects of electromagnetic field on solidification structure were studied. Compared with traditional continuous casting, the morphology of primary α-Al phase changed from coarse column grains to thin equaixsed grains, and the silicon phase with the morphology of primary silicon phase appeared in the solidification microstructure. With increasing the electronic power, the quantity of the primary silicon was reduced, and the size of the primary silicon decreased. The shape of the primary silicon was sphericity.

关 键 词：电磁连铸 铝硅共晶合金 初生硅 

分 类 号：TG244.3[金属学及工艺—铸造]