超声对Sn-Bi-1.5Al2O3/Cu焊点组织和性能的影响  

Effect of Ultrasound on Structrue and Properties of the Sn-Bi-1.5Al_2O_3/Cu Solder Joint

作　　者：张宁[1] 张春红[2] 邵浩彬 张信永 付健[1] 

机构地区：[1]徐州工程学院机电工程学院、江苏省大型工程装备检测与控制重点建设实验室,221018 [2]徐州生物工程职业技术学院、徐州市绿色洁净复合钎料工程技术研究中心

出　　处：《特种铸造及有色合金》2017年第2期117-120,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金青年项目(51505040);江苏省第五期“333工程”第三层次培养资金资助项目;江苏省大型工程装备检测与控制重点建设实验室开放课题资助项目(JSKLEDC201510);江苏省高等学校大学生实践创新训练计划资助项目(201611998034Y);徐州市科技创新专项资金资助项目(KC15SM041);徐州生物工程职业技术学院科技计划资助项目(2015KY02)

摘　　要：采用超声协振复合钎焊,并调整超声功率,制备了4组Cu/Sn-Bi-1.5Al2O3/Cu微型焊接接头,通过润湿性试验、微观组织观察、显微硬度测试、拉伸性能检测、断口形貌分析,综合评定超声功率对Sn-Bi-1.5Al2O3/Cu焊点组织和性能的影响。结果表明,利用超声波在液态钎料中的声空化和声流等次级效应,复合钎料填缝能力强,铺展面积最大提高了51.7%。经超声处理后,随着超声功率的增大,产生细晶强化、组织改善、缺陷减少的效果。当超声功率为800 W时,Bi相含量较未超声处理时减少了4.7%,钎缝中部和边界IMC层的显微硬度分别增大了40.7%和89.9%,抗拉强度和伸长率分别提高了40.7%和89.9%,断裂位置由钎缝边界逐步转移至钎缝中部。New ultrasonic-assisted soldering technology was adopted to weld four sets of Cu/Sn-Bi-1.5Al2O3/Cu micro-butt butt joints by adjusting the ultrasonic power.Through wetting testing,microstructure observation,micro-hardness experiment,tensile testing,fracture morphology analysis,effects of ultrasonic power on microstructure and properties of the Sn-Bi-1.5Al2O3/Cu solder joint were evaluated comprehensively.The results show that the filling ability of the composite solder is enhanced,and the largest spreading area is increased by 51.7% based on utilizing the secondary effects of ultrasonic cavitation and acoustic streaming of the ultrasound in liquid solder.After ultrasonic treatment,with the increase of ultrasonic power,fine grain strengthening is generated,and microstructure is improved with the decrease of defect.When the ultrasonic power is 800 W,the Bi phase content is decreased by 4.7%compared with ones in un-ultrasonic treatment.Meanwhile,hardness of the central brazing seam and IMC layer on boundary is increased by 40.7%and 89.9%,respectively,in addition,the tensile strength and elongation are increased by 40.7%and 89.9%,respectively,and the fracture position is transferred from the brazing seam boundary gradually to the central joint.

关 键 词：超声波 钎焊 SN-BI 力学性能 

分 类 号：TG454[金属学及工艺—焊接] TB559[理学—物理]