摘要
采用铁素体测试仪、Schaeffler图及WRC-1992图3种测试方法,研究了不同焊接工艺参数对E309L药芯焊丝焊缝金属铁素体数(Ferrite number,FN)的影响。结果表明,焊缝金属FN随焊接电参数的改变变化最大,气体流量居中,焊丝伸出长度最小;适当地增大焊丝伸出长度和气体流量可以降低FN;焊缝金属中N元素对气体流量、焊丝伸出长度的变化比较敏感,WRC-1992图法因考虑了N元素的作用,测试结果更准确,而铁素体测试仪法适合测试正常焊接工艺参数下的FN;随着焊接电参数、焊丝伸出长度、气体流量的增大,Schaeffler图法测试焊缝金属FN均逐渐减小。
The effect of welding parameters on ferrite number(FN)of weld metal by E309L flux-cored wires were investigated through three methods of ferrite tester,Schaeffler diagram and WRC-1992 diagram.The results showed that change of FN in weld metal was the largest with the change of welding electric parameters,the gas flow was in the middle,and wire extension was the smallest.The FN in weld metal could be decreased by increasing wire extension and gas flow appropriately.The N element in weld metal was more sensitive to the change of gas flow and wire extension.WRC-1992 diagram was more accurate due to the consideration of N element,while the ferrite tester was suitable for FN under normal process parameters.With the increase of welding electric parameters,wire extension and gas flow,FN in weld metal measured with Schaeffler diagram decreased gradually.
作者
王恒
吴瑶
季文
马雷
Wang Heng;Wu Yao;Ji Wen;Ma Lei(Tsinghua University,Tianjin Research Institute for Advanced Equipment,Tianjin 300300,China)
出处
《焊接》
2020年第6期28-32,63,共6页
Welding & Joining
