铁路通信信号工程技术2024，Vol.21Issue(z1)：133-136,4.DOI:10.3969/j.issn.1673-4440.2024.Z1.033
焊接电流对继电器银接点点焊质量的影响
Effect of Welding Current on Spot Welding Quality of Silver Relay Contacts
刘思汉 1檀校 1白轶才 2李庆诗 1刘炜1
作者信息
- 1. 沈阳铁路信号有限责任公司,沈阳 110025
- 2. 中国铁路沈阳局集团有限公司通辽电务段,内蒙古 通辽 028000
- 折叠
摘要
Abstract
This paper conducts a shearing test to study the impact of welding current on the spot welding quality of the silver contacts of railway signal relays,and uses a metalloscope and a scanning electron microscope to observe the shearing and fracturing behaviors of welded splices under different welding currents.The results show that as the welding current increases,the shear strength of the welded splices first increases,and then decreases,followed by a rapid rise.When the welding current is 7.0 kA,the shear strength reaches 585 N,which is when the quality of the welding nugget is the highest.Analysis based on the shearing and fracturing behaviors of the welded splices found that,with respect to the defects of pores in welds,the size of the welding nuggets is the main factor affecting the shear performance of the spot welding splices of the relay contacts.An increase in the size of the welding nuggets will cause an increase in the shear strength of the weld interface area.关键词
继电器/电阻点焊/焊接强度/失效机理Key words
relay/resistance spot welding/welding strength/failure mechanism分类
交通工程引用本文复制引用
刘思汉,檀校,白轶才,李庆诗,刘炜..焊接电流对继电器银接点点焊质量的影响[J].铁路通信信号工程技术,2024,21(z1):133-136,4.
