摘要
针对工程机械常用钢材Q355B,通过弧焊机器人MAG焊,焊接电流控制在280~400A,进行不同焊接参数下的工艺试验研究。结果表明:随着电流的增加其焊接接头性能并没有出现大幅的衰减,焊接接头试样抗拉强度、屈服强度、断后伸长率、弯曲性能、冲击性能及硬度均符合标准要求,均可达到母材或高于母材水平,当焊接电流控制在350A时,焊接接头具有最优的性能。同时,相比焊接电流较小时,随着焊接电流增加到380A以上时,效率提升20%左右,可用于指导实际生产。
For the commonly used steel Q355B of construction machinery,through the arc welding robot MAG welding,the welding current is controlled at 280 to 400A,and process test research under different welding parameters is performed.The test results show that as the current increases its welding joint performance,there is no significant attenuation.The tensile strength,yield strength,elongation after fracture,bending performance,impact performance,and hardness performance of welded joint specimens all meet the standard requirements,and their performance can reach or exceed the level of the base metal.Welding joints have optimal performance when the current is controlled at 350A.At the same time,compared to when the welding current is small,as the welding increases to above 380A,the efficiency can be improved by about 20%,which is used to guide actual production needs.
作者
赵小康
张海燕
李慧琼
李世霞
冶维财
屈海东
ZHAO Xiaokang;ZHANG Haiyan;LI Huiqiong;LI Shixia;YE Weicai;QU Haidong(Gansu Steel Vocational and Technical College,Jiayuguan 735100,Gansu,China;Guangxi Liugong Machinery Co.,Ltd.,Liuzhou 545001,Guangxi,China)
基金
甘肃省创新基金项目(2023B-488)。
关键词
Q355B钢
MAG
焊接电流
接头性能
效率
Q355B steel
MAG
welding current
performance of welding joints
efficiency
