摘要
以板厚差异明显(板厚比接近7∶1)的301L不锈钢板组合为研究对象,系统研究了密封胶对电阻点焊可焊性、熔核形貌、力学性能和生产因素的影响规律。研究结果表明,密封胶受热分解过程可以改变电流密度分布,进而影响熔核直径和熔透深度,使得可接受电流范围发生变化。此外,密封胶的引入对焊点间距设计基本无影响,对板材间隙尺寸也表现出较好的容忍度。
The influences of adhesive sealant on weldability,nugget morphology,mechanical property and manufacturing process of resistance spot welding were systematically studied by 301 L stainless steel with obvious different thickness(close to 7:1)of sheets.The results show that the thermal decomposition processes of adhesive sealant may change current density distribution,which in turn affects the nugget diameter and penetration depth,and finally change the acceptable current range.In addition,the introduction of adhesive sealant has little effect on the weld spacing,and also shows a good tolerance to the initial gap.
作者
郭太吉
张庆鑫
孙晓光
韩晓辉
张志毅
李永兵
GUO Taiji;ZHANG Qingxin;SUN Xiaoguang;HAN Xiaohui;ZHANG Zhiyi;LI Yongbing(CRRC Qingdao SIFANG Co.,Ltd.,Qingdao,Shandong,266111;State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai,200240;Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures,Shanghai Jiao Tong University,Shanghai,200240)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2018年第24期3009-3014,共6页
China Mechanical Engineering
基金
国家自然科学基金资助项目(U1564204
51322504)
关键词
301L不锈钢
差厚
电阻点焊
密封胶
可焊性
力学性能
301L stainless steel
different thickness
resistance spot welding
adhesive sealant
weldability
mechanical property
