摘要
以BVR2.5铜线和BLV6铝线为研究对象,采用超声波焊接连接铜/铝异种金属导线,利用SEM,EDS,XRD和万能拉伸试验机分析超声波焊接能量对铜/铝导线焊接接头结合性能的影响.结果表明,超声波焊接可以实现铜/铝异种金属导线的有效连接.随着焊接能量增加,铜/铝界面原子相互扩散距离增加,但未形成中间相,接头抗拉力先升高后降低.当焊接能量较低时,接头抗拉强度取决于铜/铝导线冶金结合面积;当焊接能量超过 300 J时,接头抗拉强度取决于铝侧有效承载面积;当焊接能量为 300 J时,接头获得峰值拉伸载荷(409.8 N±8.9 N),拉伸时在铝侧断裂,断口为韧性断裂,接头性能较好.
Abstract
Ultrasonic welding was used to connect BVR2.5 Cu cables and BLV6 Al cables.SEM,EDS,XRD and univer-sal tensile testing machine were used to investigate the effect of ultrasonic welding energy on the bonding properties for Cu-Al cables joints.The results show that effective joining of Cu-Al cables could be achieved by ultrasonic welding.With the in-crease of welding energy,the diffusion distance of the atoms at the Cu-Al interface increases,but the intermediate phase is not formed,and the tensile strength of the joint increases and then decreases.At low welding energies,the tensile strength of the joint depends on the metallurgical bonding area of the Cu-Al conductor.When the welding energy exceeds 300 J,the tensile strength of the joint depends on the effective bearing area of the Al side.The joints obtained peak tensile load(409.8 N±8.9 N)at the welding energy of 300 J and fractured on the Al side in tension.The fracture was in ductile fracture,which in-dicates the good performance of the joint.
基金项目
中央高校基本科研业务费专项(B230205013)
中央高校基本科研业务费专项(B220203019)
江苏省研究生科研与实践创新计划(KYCX23_0739)
大学生创新创业训练计划(202310294124Y)
维普
万方数据