焊接电流对Q235钢焊接接头残余应力的影响  

The Influence of Welding Current on the Residual Stress of Q235 Steel Welded Joint

作　　者：邰驰 高志刚[2] 陆建国[2] 许明明[2] 

机构地区：[1]江苏省特种设备安全监督检验研究院太仓分院 [2]江苏省特种设备安全监督检验研究院苏州分院

出　　处：《化工装备技术》2017年第2期51-55,共5页Chemical Equipment Technology

摘　　要：对12 mm厚Q235试板进行手工电弧焊试验研究。采用3种不同焊接电流参数对3组试板进行焊接,以研究不同焊接电流下焊接接头所产生的残余应力。3组试板均采用双面焊。分别对正面填充焊和盖面层焊采用155 A、165 A、175 A三种焊接电流。焊完后采用残余应力测试方法对焊接接头进行分析。研究结果表明,Q235钢在175 A电流下焊接接头残余应力比165 A电流下大,155 A电流下最小。随着焊接电流的增大,焊接残余应力升高。The 12 mm thick Q235 plates were tested by manual arc welding. In order to study the residual stress in welding joint under different welding currents, 3 welding currents were used to weht the 3 sets of test plates, and the double-sided welding were adopted. Three kinds of currents, 155 A, 165 A, and 175 A, were used in the welding of the front filling layer and the capping layer. After welding, the residual stress test method was used to analyze the welding joints. The results showed that the residual stress in the welding joint of Q235 steel under the 175 A current was higher than that of 165 A, and the residual stress under 155 A current was the lowest. In other words, the welding residual stress increased with the increase of welding current.

关 键 词：焊接电流 Q235钢 焊接接头 残余应力 手工电弧焊 

分 类 号：TG407[金属学及工艺—焊接]