球门用铝基复合材料制备工艺及其性能研究  

Study on Preparation and Properties of Aluminum Matrix Composite for Football Door

作　　者：刘青[1] 崔磊[2] LIU Qing;CUI Lei(Physical Education Department,Suqian College,Suqian 223800,China;College of Information Engineering,Suqian College,Suqian 223800,China)

机构地区：[1]宿迁学院体育部,江苏宿迁223800 [2]宿迁学院信息工程学院,江苏宿迁223800

出　　处：《热加工工艺》2022年第20期76-80,共5页Hot Working Technology

基　　金：湖南省自然科学基金项目(2018JJ1003);2020年江苏省高校研究基金项目(2020SJA2190)。

摘　　要：通过在ZL101铝合金熔体中添加Na_(3)AlF_(6)和Ti粉,制备了球门用铝基复合材料,研究了电磁搅拌对铝基复合材料的微观组织形貌和耐腐蚀性能的影响。结果显示,当在施加电磁搅拌时,复合材料中α-Al相形貌呈现为近球状,晶粒尺寸约为38.1μm,形状系数为0.81,相比于ZL101铝合金基体,分别减小了25.9%和增大了1.9倍。复合材料的拉伸强度为287.8 MPa,伸长率为3.14%,相比于基体分别增大了28.2%,减小了29.2%。在1 mol/L的HCl溶液中浸泡腐蚀,腐蚀速率随时间的增大而增大。浸泡24 h后,施加电磁搅拌后的TiAl_(3)颗粒增强铝基复合材料的单位面积腐蚀速率最小为0.082 g·m^(-2)·h^(-1),相对于铝合金基体下降了52.6%。电化学测试结果显示,铝基复合材料的腐蚀电位从基体的-698 mV上升到-589 mV,腐蚀电流密度从64μA/cm^(2)下降到25μA/cm^(2),TiAl_(3)颗粒增强铝基复合材料的耐腐蚀性能大大提升。Aluminum matrix composites for goal door were prepared by adding Na_(3)AlF_(6)and Ti powders into ZL101 aluminum alloy melt.The effects of electromagnetic stirring on the microstructure and corrosion resistance of aluminum matrix composites were studied.The results show that the morphology ofα-Al phase is nearly spherical,the grain size is about 38.1μm,and the shape coefficient is 0.81.Compared with the ZL101 aluminum alloy,the grain size decreases by 25.9%and the shape coefficient increases by 1.9 times,respectively.The tensile strength and elongation of the composite are 287.8 MPa and 3.14%respectively,which are increased by 28.2%and decreased by 29.2%than that of the matrix.The corrosion rate increases with the increase of immersion time in 1 mol/L HCl solution.After immersion for 24 h,the corrosion rate of TiAl_(3)particle reinforced aluminum matrix composite after electromagnetic stirring is the smallest,which is 0.082 g·m^(-2)·h^(-1),and decreases by 52.6%than that of aluminum alloy matrix.The electrochemical test results show that the corrosion potential of aluminum matrix composites increases from-698 mV to-589 mV,and the corrosion current density decreases from 64μA/cm^(2)to 25μA/cm^(2).The corrosion resistance of TiAl_(3)particle reinforced aluminum matrix composite is greatly improved.

关 键 词：电磁搅拌 铝基复合材料 微观组织 耐腐蚀性 

分 类 号：TB333.12[一般工业技术—材料科学与工程]