Y对铸态Cu-15Ni-8Sn合金性能及Sn元素分布的影响  

Effect of Y on properties and Sn distribution of as-cast Cu-15Ni-8Sn alloy

作　　者：刘东东 苏娟华[1,4,5] 杨冉 周延军[1,4,5] 张彦敏 柳亚辉[3,4,5] 张朝民 郁炎[6] 陈纪东 黄宽 姜凯旋 余勃[1] LIU Dong-dong;SU Juan-hua;YANG Ran;ZHOU Yan-jun;ZHANG Yan-min;LIU Ya-hui;ZHANG Chao-min;YU Yan;CHEN Ji-dong;HUANG Kuan;JIANG Kai-xuan;YU Bo(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;School of Medical Technology and Engineering,Henan University of Science and Technology,Luoyang 471023,China;School of Mechanical and Electrical Engineering,Henan University of Science and Technology,Luoyang 471023,China;Provincial and Ministerial Co-construction Collaborative Innovation Center of Nonferrous New Materials and Advanced Processing Technology,Luoyang 471023,China;Henan Key Laboratory of Advanced Nonferrous Materials,Luoyang 471023,China;Luoyang Ship Material Research Institute,Luoyang 471023,China;BoWei Alloy Materials Co Ltd,Ningbo 315000,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]河南科技大学医学技术与工程学院,河南洛阳471023 [3]河南科技大学机电工程学院,河南洛阳471023 [4]有色金属新材料与先进加工技术省部共建协同创新中心,河南洛阳471023 [5]河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023 [6]中国船舶重工集团公司第七二五研究所,河南洛阳471023 [7]博威合金材料股份有限公司,浙江宁波315000

出　　处：《材料热处理学报》2023年第3期86-94,共9页Transactions of Materials and Heat Treatment

基　　金：国家重点研发计划(2021YFB3700700);国家自然科学基金(52173297,52071133);中原学者工作站资助项目(214400510028);河南省重点研发与推广专项(212102210441);河南省科学院科研开发专项(220910009)。

摘　　要：利用传统熔铸法制备了Cu-15Ni-8Sn和Cu-15Ni-8Sn-0.57Y合金,通过光学显微镜(OM)、扫描电镜(SEM)和直读光谱仪等研究了Y元素对铸态Cu-15Ni-8Sn合金的组织、力学性能和Sn元素分布的影响。结果表明:添加Y能细化铸态Cu-15Ni-8Sn合金的枝晶形貌,使合金中层片状过渡组织(α+γ相)减少,并且可以抑制Sn元素的宏观偏析,铸锭中部和下部Sn元素宏观偏析程度分别改善了28%和9%;此外添加Y元素后,Cu-15Ni-8Sn合金硬度由108 HB增加到116.3 HB,导电率由9.834%IACS下降到6.634%IACS。Cu-15Ni-8Sn and Cu-15Ni-8Sn-0.57Y alloys were prepared by conventional melting casting method.The effect of Y element on microstructure,mechanical properties and Sn element distribution of the as-cast Cu-15Ni-8Sn alloy was studied by means of optical microscope(OM),scanning electron microscopy(SEM)and direct-reading spectrometer.The results show that the addition of Y can refine the dendrite morphology of the as-cast Cu-15Ni-8Sn alloy,reduce the lamellar transition structure(α+γphase)in the alloy,and inhibit the macro segregation of Sn element.The macro segregation degree of Sn element in the middle and lower parts of the ingot is improved by 28%and 9%,respectively.In addition,the hardness of the Cu-15Ni-8Sn alloy increases from 108 HB to 116.3 HB,and the conductivity decreases from 9.834%IACS to 6.634%IACS after adding Y element.

关 键 词：CU-15NI-8SN合金 稀土Y 显微组织 宏观偏析 

分 类 号：TG146.1[一般工业技术—材料科学与工程]