摘要
为实现钛种板与紫铜铜耳的焊接,采用自行改制的交流电阻焊机,使用银基钎料对钛板与紫铜进行电阻钎焊工艺试验。结果表明,选择合理的电阻钎焊工艺参数,可以实现钛与紫铜的良好焊接。焊缝微观结构通过光学显微镜、EPMA等进行分析,发现焊缝结合紧密连续,无明显焊接缺陷,钎料和母材元素相互扩散充分。另外对焊接电流、焊接时间、焊接压力等参数对接头力学性能的影响进行研究,结果在最佳工艺参数下得到的接头抗剪强度可达70 MPa以上。现有条件下使用功率为200 kVA的电阻焊机可以实现搭接面积为70 mm×50 mm的钛种板和铜耳的焊接,并满足一定条件下的使用要求,直接应用于工业生产。
In order to weld the red copper ears to the titanium starting sheet,the brazing experiments were carried out with the silver-based brazing filler metal by using the numerical control AC resistance welding machine with the power of 200kVA.The microstructure of welded joint were analyzed by optical microscope,EMPA.The results show that the combination of brazing seam is close and continuous and has no defect. The diffusion between the brazing filler metal and the base metal is complete.The influence of brazing parameters such as current,brazing time and pressure on the mechanical properties of the joints were studied.The results show that the shear strength can achieve above 70 MPa under the reasonable resistance brazing parameters,which meets some operation requirements.
出处
《焊接》
北大核心
2009年第4期43-46,共4页
Welding & Joining
关键词
电阻钎焊
焊接参数
浸润
抗剪强度
resistance brazing
brazing parameters
soakage
shear strength
