磁浮列车用铜基受电靴滑块材料的研究

Study on Cu-based slider-crank for collector shoe of maglev vehicle

研究了一种新型Cu-Sn-Pb-Cr-C受电靴滑块材料,并进行了性能测定和组织观察。结果表明:受电靴滑块材料具有优良的综合性能,其抗拉强度为138.1MPa,断口局部范围内有韧断特征;摩擦系数为0.38,其摩擦性能大大优于纯Cu;材料的电导率可达74%IACS,明显高于纯Al(60%IACS)。从其微观结构可以发现,试样材料中Cu基体以连续网状形式分布,加入的石墨比较均匀地分布在网络空隙内,充分发挥了材料的导电性能及石墨的自润滑性能。

A new collector shoe（Cu-Sn-Pb-Cr-C） for maglev vehicle was studied.The properties including volume density,tensile strength,hardness,conductivity and tribological behavior have been tested,and it＇s microstructure,fracture and wearing surface also have been observed under the optical microscope and scanning electron microscope.The result shows that the comprehensive properties of the collector shoe is perfect.The tensile strength is 138.1 MPa and frictional coefficient is 0.38,which enormously better than that of pure Cu.The conductivity is 74%IACS,which is much higher than that of pure aluminium（60%IACS）.As shown in the microstructure,the Cu matrix of the sample uppears in the form of series reticulation and the added graphite well distributes in it,which sufficiently exert the conductivity properties and the self-lubrication of graphite.