不同焊接参数对Q355B钢焊接接头力学性能的影响  

The influence of different welding parameters on the mechanical properties of Q355B steel welded joints

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)

机构地区：[1]甘肃钢铁职业技术学院,甘肃嘉峪关735100 [2]广西柳工机械股份有限公司,广西柳州545001

出　　处：《金属加工（热加工）》2024年第9期36-40,共5页MW Metal Forming

基　　金：甘肃省创新基金项目(2023B-488)。

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.

关 键 词：Q355B钢 MAG 焊接电流 接头性能 效率 

分 类 号：TG457.11[金属学及工艺—焊接]