搅拌铸造SiCp/2024复合材料的研究  

Study of Stir Cast SiCp/2024 Composite

作　　者：苏海[1] 高文理[1] 毛成[1] 刘洪波[1] 卢健[2] 陆政[2] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]北京航空材料研究院,北京100095

出　　处：《湖南大学学报（自然科学版）》2009年第8期54-58,共5页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50771043);国家基础研究计划资助项目(2008CB617608;2008CB623704)

摘　　要：利用工程计算ANSYS有限元软件对搅拌坩埚内流场进行了数值模拟,分析了搅拌器结构对熔体流场的影响,模拟结果表明,多级搅拌器有助于搅拌混合过程.对搅拌制备工艺参数对颗粒分布状态的影响规律进行了系统的研究,并确定了最佳工艺参数.力学测试结果表明,与基体合金相比,SiC颗粒的加入提高了材料的抗拉强度和硬度,延伸率略有下降.拉伸断口观察表明,铸态SiCp/2024复合材料主要断裂方式为SiC颗粒断裂和界面脱粘.The fluid flow in stirred crucible during stir casting was simulated by using finite dement ANSYS software. The effect of stirrer＇ geometry on flow pattern was investigated. Simulation results showed that the multilevel stirrer was beneficial to the mixed process. This article dealed with the relationship between the man- ufacturing technology of SiCp/2024 composite and particle distribution, and the optimum stirring process was determined. Tensile test showed that, compared with matrix alloy, the strength and hardness of SiCp/2024 composite were improved due to the incorporation of SiC particles, while the ductility decreased obviously. The tensile fracture surface result showed that the fracture of as-cast SiCp/2024 composite mainly resulted from SiC particle breakage and Al/SiC interfacial debonding.

关 键 词：铝基复合材料 搅拌铸造 显微组织 力学性能 数值模拟 

分 类 号：TB331[一般工业技术—材料科学与工程]