电磁搅拌频率对Cu-2Ag-0.04La合金组织及性能的影响  

Effect of Electromagnetic Stirring Frequency on Microstructure and Properties of Cu-2Ag-0.04La Alloy

作　　者：郭伟 陈岩[2,3,4] 洪志远 宋鸿武 王克鲁[1] 张士宏[2,4] 邱仟[1] GUO Wei;CHEN Yan;HONG Zhi-yuan;SONG Hong-wu;WANG Ke-lu;ZHANG Shi-hong;QIU Qian(School of Aeronautical Manufacturing Engineering,Nanchang Aviation University,Nanchang 330063,Jiangxi,China;Shichangxu Advanced Materials Innovation Center,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China;Jiangxi Copper Technology Research Institute Co.,Ltd.,Nanchang 330096,Jiangxi,China;Jiangxi Copper Company Limited,Nanchang 330096,Jiangxi,China)

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063 [2]中国科学院金属研究所师昌绪先进材料创新中心,辽宁沈阳110016 [3]江西铜业技术研究院有限公司,江西南昌330096 [4]江西铜业股份有限公司,江西南昌330096

出　　处：《铜业工程》2022年第1期10-13,共4页Copper Engineering

基　　金：中国博士后科学基金资助项目(2019M662276);中国科学院科技服务网络计划区域重点资助项目(KFJ-STS-QYZD-145);江西省重大科技研发专项(20203ABC28W004)。

摘　　要：采用真空连铸和电磁搅拌制备了直径15 mm的Cu-2%Ag-0.04%La合金棒坯,通过光学显微镜和力学拉伸试验研究了电磁搅拌频率对合金凝固组织、力学性能的影响。研究表明,随着搅拌频率的增加,枝晶尺寸逐渐增大。Cu-2%Ag-0.04%La合金的硬度和抗拉强度随着搅拌频率的增加而降低,与频率为10 Hz的合金相比,抗拉强度降低8.5%,硬度降低7.4%。性能变化主要与横截面方向枝晶的数量和形貌有关。Cu-2%Ag-0.04%La alloy rod blank with a diameter of 15 mm was produced by vacuum continuous casting and electromagnetic stirring,the effect of electromagnetic stirring frequency and La addition on solidification microstructure,mechanical properties of alloys by optical microscopy and mechanical tensile test.Research shows that with the increase of stirring frequency,the dendrite size increases gradually.The hardness and tensile strength of the Cu-2%Ag-0.04%La alloy decrease with the increase of stirring frequency,Compared with the alloy with the frequency of 10 Hz,the tensile strength decreased by 8.5%,and the hardness decreased by 7.4%.It is mainly related to the number and morphology of dendrites in the cross section direction.

关 键 词：CU-AG合金 搅拌频率 稀土La 微观组织 力学性能 

分 类 号：TG27[金属学及工艺—铸造] TG146[一般工业技术—材料科学与工程]