电焊机2024，Vol.54Issue(12)：121-125,5.DOI:10.7512/j.issn.1001-2303.2024.12.19
触头电阻钎焊工艺和微观组织研究
Study on the Resistance Brazing Process and Microstructure of Electrical Contacts
朱世良 1田修波 2陈庆 3张天怡 3郝子硕2
作者信息
- 1. 哈尔滨工业大学,黑龙江 哈尔滨 150001||厦门宏发电声股份有限公司,福建 厦门 361021
- 2. 哈尔滨工业大学,黑龙江 哈尔滨 150001
- 3. 厦门宏发电声股份有限公司,福建 厦门 361021
- 折叠
摘要
Abstract
The resistance brazing method was employed to weld AgSnO2 contact points and H62 brass contact bridges using BAg60CuZn brazing filler metal.The effects of welding current,welding time,and welding pressure on the shear strength of the contacts were analyzed.The results indicate that the maximum shear strength of 20.3 MPa is achieved when the welding current is 7.5 kA,the welding time is 90 cycles,and the electrode pressure is 2.3 kN.As the brazing rate increases,the shear strength of the contacts continuously increases and stabilizes at approximately 20 MPa when the brazing rate reaches about 85%.Microstructural analysis reveals that the weld consists mainly of silver-copper eutectic and solid solution structures.With the increase of the brazing rate,the weld microstructure gradually improves,and defects decrease.The brazing rate cal-culated by ultrasonic C-scan can directly reflect the welding quality of the contact.关键词
电阻钎焊/触头/钎着率/剪切强度Key words
resistance brazing welding/electrical contact/brazing rate/shear strength分类
矿业与冶金引用本文复制引用
朱世良,田修波,陈庆,张天怡,郝子硕..触头电阻钎焊工艺和微观组织研究[J].电焊机,2024,54(12):121-125,5.
