20MnMoNb锻件焊接裂纹的分析及返工监理实践

Analysis of Welding Crack on 20MnMoNb Forging and Rework Supervision Practice

通过对20MnMoNb厚锻件窄间隙埋弧焊接接头裂纹原因的分析,找出了主要影响因素,提出了改进工艺措施,成功完成了焊缝返工焊接。

By analyzing the reasons of the welding crack on 20MnMoNb forging in NG- SAW （narrow-gap submerged arc welding）, this article identifies the main consequence and proposed an improved process, which solves the problem of joint crack