埋弧焊管自动补焊与手工补焊的焊缝性能对比研究

Contrast Study on Weld Performance of SAW Pipe by Auto Repair Welding and Manual Repair Welding

针对钢管缺陷人工补焊的不可控性,以及预精焊螺旋管自动补焊工艺的实现,选用X70级φ1 016 mm×17.5 mm规格预精焊螺旋管分别进行了内焊缝补焊、外焊缝补焊及内外焊缝补焊(同一位置先内后外或先外后内)的传统人工补焊与使用精焊设备进行的自动补焊,补焊长度大于1000 mm。补焊后通过对比人工补焊与自动补焊的焊缝冲击韧性、金相组织,验证了自动补焊的可行性,试验结果显示,自动补焊的焊缝性能好于人工补焊。

IAiming at the uneontrollability of manual repair wehting , and auto repair welding on SAW pipe was realized by pre-finishing wehting process, the traditional manual repair wehling and auto repair welding were ~arried u,t on X70 φ 1 016 mm× 17.5 mm SAW pipe, including inside weld repair welding, outside weht repair welding, and both sides weld repair welding （ it can be done from the inside to outside weld or converse sequence） by manual repair welding; auto re, pair welding by adopting finish wehting equipment, and the repair length is longer than 1 000 mm. The irnpaet toughness and metallographie structure of the said two welding process were compared, the feasibility of auto repair welding was validate（t. The results showed that the weld performance of auto repair welding is better than that of manual repair welding.