X80M钢Φ1219 mm×18.4 mm螺旋埋弧焊管导向弯曲不合格原因分析
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摘要
针对X80M钢Φ1 219 mm×18.4 mm螺旋埋弧焊管生产中出现的导向弯曲试验不合格现象,通过钢管性能分析、热模拟试验分析、焊接参数分析及微观组织分析等手段,对出现导向弯曲不合格的原因进行了系统、全面的分析,得出了以下结论:厚壁螺旋埋弧焊管生产时易出现热影响区软化;厚壁螺旋埋弧焊管卷板订货时强度不宜过高;螺旋埋弧焊管卷板板边的夹杂物缺陷在弯曲应力作用下,易形成脆性断裂区,最终导致开裂。通过控制焊接热输入、合理制定卷板强度范围、调整板边铣削量等手段可避免此类缺陷的产生。
According to unqualified guide bending test of X80M Φ1 219 mm×18.4 mm SSAW pipe in production,property,thermal simulation,welding parameters and microstructure were analyzed for unqualified reasons.The results showed that softening of heat-affected zone was more likely to occur on heavy-wall SSAW pipe production; parent metal strength of wiled sheet should not be too high; because of inclusions on the edges of wiled sheet with bending stress,brittle fracture zone was easily formed and finally leaded to crack.The above methods could prevent the defect,including controlling heat input of welding,setting reasonable strength range and adjusting edge milling parameters.
According to unqualified guide bending test of X80M Φ1 219 mm×18.4 mm SSAW pipe in production,property,thermal simulation,welding parameters and microstructure were analyzed for unqualified reasons.The results showed that softening of heat-affected zone was more likely to occur on heavy-wall SSAW pipe production; parent metal strength of wiled sheet should not be too high; because of inclusions on the edges of wiled sheet with bending stress,brittle fracture zone was easily formed and finally leaded to crack.The above methods could prevent the defect,including controlling heat input of welding,setting reasonable strength range and adjusting edge milling parameters.
引文
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[10]李涛,田鹏,孙宏,等.X80M钢热轧板卷冲击性能不合格的原因分析[J].机械工程材料,2014,38(7):102-108.
[2]冯耀荣,霍春勇,吉玲康,等.我国管线钢和钢管研究应用新进展及发展展望[J].石油管工程,2013,19(6):1-5.
[3]李延丰.西气东输二线管道工程用X80钢级Φ1 219 mm直缝埋弧焊管的研发[J].钢管,2009,38(3):33-38.
[4]杜伟,荆松龙,李云龙,等.X70钢直缝埋弧焊管导向弯曲开裂的原因[J].机械工程材料,2012,36(10):97-100.
[5]杨丁门,何兴利,赵炜,等.西气东输二线用X80级螺旋埋弧焊管导向弯曲性能分析[J].焊管,2009,32(9):18-21.
[6]杜则裕.X80管线钢的焊接性[J].电焊机,2009,39(5):15-17.
[7]郑江鹏,陈浮,黄治军,等.高等级管线钢焊接热影响区软化研究现状[J].武钢技术,2014,52(2):59-62.
[8]赵波,李国鹏,王旭,等.X80管线钢焊接热影响区组织性能改善措施[J].焊管,2014,37(4):47-54.
[9]杨忠文,毕宗岳,牛辉.高钢级管线钢焊管研制[J].焊管,2011,37(4):5-11.
[10]李涛,田鹏,孙宏,等.X80M钢热轧板卷冲击性能不合格的原因分析[J].机械工程材料,2014,38(7):102-108.