铁和钴对ZCuSn3Zn8Pb6Ni1合金组织及性能的影响.pdfVIP

学兔兔 Dec．2008 铸 造 Vo1．57 NO．12 FOUNDRY ·1251· 铁和钴对ZCuSn3Zn8Pb6NI1合金组织及性能的影响 王强松，王自东，朱军军，范 明，张 鸿 (北京科技大学材料科学与工程学院，北京100083) 摘要：在zcusn3zn8Pb6N订铸造青铜的基础上添加了一定比例的铁和钴元素，研制了ZCuSn3Zn8Pb6NilFeCo合金。结 果表明：添加1％～3％铁和0．5％ 1．5％钴后，铸造组织由典型的枝晶组织变为等轴晶组织，晶粒平均直径由3mm以上细 化到20~60 m，晶粒细化到1％以下；抗拉强度由180～230MPa提高到400--450MPa，而伸长率仍保持在20％以上；消除 了锡的宏观偏析。 关键词：铸造青铜；zCusn3zn8Pb6Ni1FeCo合金；宏观偏析 中图分类号：TG146．1+1 文献标识码：A 文章编号：1001—4977(2008)12—1251—04 E仟_ects of Iron and Cobalt on Structure and Performance of ZCUSn3Zn8Pb6Ni 1 Alloy WANG Qiang—song，WANG Zi—dong，ZHU Jundun，FAN Ming，ZHANG Hong 【School of Materials Science and Engineering，University of Science and Technology Beijing Beijing 1 00083，China) Abstract：The ZCuSn3Zn8Pb6Ni1 FeCo alloy was developed by adding certain proportion of Fe and CO．The result showed that the as-cast microstructure of the alloy transforms frOm typicaI dendritic to equiaxed after addition of 1％．3％Fe and 0．5％．1．5％Co，respectively，and the grains was refined to Iess than 1％as that of ZCuSn3Zn8Pb6Ni1 alloy．with the average diameter improved fr0m 3 mm t0 20．60 lam．At the same time．the tensile strength of the ZCuSn3Zn8Pb6Ni 1 FeCo alloy increases fr0m 1 80．230 MPa to 400—450 MPa．and that the elongation still keeps 20％ or more．The macrosegregation of tin is eliminated． Key words：cast bronze；ZCuSn3Zn8Pb6Ni1 FeCo alloy；macrosegregation 锡青铜具有高的强度和伸长率，好的耐磨性和优 1 试验过程 异的抗腐蚀性能，因此广泛应用于铸造泵体及叶轮、 螺旋桨、阀门、密封圈、齿轮、汽车同步器齿环、轴 为了