摘要
通过真空熔炼的方法制备了Cu-0.6Zr-0.3Fe合金。采用光学显微镜(OM)、扫描电镜(SEM)、能谱仪(EDS)、X射线衍射和电子万能试验机等对合金的显微组织及元素分布、物相及力学性能进行了分析测试。结果表明:铸态Cu-0.6Zr-0.3Fe合金的晶粒较为粗大,同时晶间存在黑色球状、长条状共晶组织;经930℃固溶处理60 min后的晶粒组织变得细小,并且共晶组织由长条状转变为球状,经30%冷变形及时效后晶粒基本保持着冷轧形貌;时效初期合金的硬度先迅速升高达到峰值,而后随着时效时间的延长开始降低,最后趋于平缓或下降,抗拉强度变化趋势与之相同;在本次实验条件下合金的最佳时效工艺参数为450℃时效120 min,此时其显微硬度、抗拉强度和导电率分别为152.6 HV0.3、495.4 MPa和55.5%IACS。
Cu-0.6Zr-0.3Fe alloy was prepared by vacuum melting method.Microstructure,element distribution,phase and mechanical properties of the alloy were analyzed and tested by means of optical microscope(OM),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS)analysis,X-ray diffraction and electronic universal testing machine.The results show that the grains of the as cast Cu-0.6Zr-0.3Fe alloy are relatively coarse,and there are black spherical and long strip shape eutectic structures between the grains.After solution treatment at 930℃for 60 min,the grains become fine,and the eutectic structure changes from long strip shape to spherical.After 30%cold deformation and aging,the grains basically maintain the cold-rolled morphology.At the initial stage of aging,the hardness of the alloy rapidly increases to peak value,then decreases with the increase of aging time,and finally tends to stable or decrease,with the same trend in tensile strength change.The optimal aging process for the alloy under the experimental conditions is aging at 450℃for 120 min,and its microhardness,tensile strength and conductivity are 152.6 HV0.3,495.4 MPa and 55.5%IACS,respectively.
作者
郭密雪
周孟
张毅
景柯
田保红
刘勇
GUO Mi-xue;ZHOU Meng;ZHANG Yi;JING Ke;TIAN Bao-hong;LIU Yong(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Henan Collaborative Innovation Center for Non Ferrous Metal Generic Technology,Luoyang 471023,China;Henan Key Laboratory of Non Ferrous Metal Materials Science and Processing Technology,Luoyang 471023,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2024年第4期70-77,共8页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(52071134)
河南省自然科学基金(232300420089)
河南省高校科技创新团队支持计划(22IRTSTHN001)。
