微量Ce对铸态低Be铜合金组织和性能的影响  

Effect of Trace Ce on Microstructure and Properties of As-cast Low Beryllium Copper Alloy

作　　者：方森鹏 陈乐平[1] 周全[1] 周水军 Fang Senpeng;Chen Leping;Zhou Quan;Zhou Shuijun(School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University;Xinyu Great Wall Copper Product Development Co.,Ltd.)

机构地区：[1]南昌航空大学航空制造工程学院 [2]新余长城铜产品开发有限公司

出　　处：《特种铸造及有色合金》2023年第2期245-249,共5页Special Casting & Nonferrous Alloys

基　　金：江西省科技重点研发项目(20192BBE50035)。

摘　　要：研究了微量Ce对低铍Cu-1.7Ni-0.2Co-0.5Be合金凝固组织、力学性能和导电性能的影响。结果表明,微量Ce可以细化合金的组织,扩大其等轴晶区;随着Ce添加量增加,合金的抗拉强度呈先增大后减小的趋势。当Ce含量为0.10%时,合金的等轴晶范围最大、二次枝晶臂间距最小,此时合金的抗拉强度达到最大值518.9 MPa,比未添加Ce时提高了6%。Ce对合金导电性能的影响呈先上升后下降的趋势;当Ce含量为0.15%时,合金的电导率达到最大值21.924 MS/m,比未添加稀土元素时提高了11%。Effects of trace Ce element on the solidification structure, mechanical properties and electrical conductivity of low beryllium Cu-1.7Ni-0.2Co-0.5Be alloy were investigated.The results indicate that addition of trace rare earth Ce can refine the microstructure and increase the equiaxed crystal zone.With the increase of Ce addition, the tensile strength of the alloy tends to be increased at first and then decreased.When Ce addition is 0.10%, the equiaxed crystal of the alloy exhibits the largest range and the smallest secondary dendrite arm spacing, where the tensile strength reaches the maximum value of 518.9 MPa, which is 6% higher than that without rare earth addition.The effect of rare earth Ce on the conductivity of low beryllium copper alloy is increased at first and then decreased.When the addition of Ce is 0.15%, the electric conductivity of the alloy reaches the maximum value of 21.924 MS/m, which is 11% higher than that without rare earth addition.

关 键 词：低铍铜 稀土 凝固组织 力学性能 电导率 

分 类 号：TG146.11[一般工业技术—材料科学与工程] TG113.12[金属学及工艺—金属材料]