管线钢X70-L245对接接头焊接工艺研究  

Study of the Welding Procedure for X70-L245 Butt Joint of Pipeline Steel

作　　者：张玉芝[1] 吕向阳[1] 马彦昌[1] 孙德新[1] 

机构地区：[1]河北石油职业技术学院,河北廊坊065000

出　　处：《管道技术与设备》2005年第4期28-29,共2页Pipeline Technique and Equipment

摘　　要：针对不同强度级别的管线钢X70和L245对接的焊接工艺进行了研究。通过碳当量计算和金相组织观察,分析了钢材焊接性;确定出预热和层间温度;选择了焊接材料;并进行了坡口设计。同时根据Q/SYXQ18—2002和XQ-CS-JX-SPE-0010标准对所制定的焊接工艺进行了评定。经评定,管口外观检查和射线检测合格,金相组织、拉伸试验、冲击试验等各项性能指标优良。按照该工艺施工的焊接接头质量合格,完全满足施工的技术要求。A study was made of the welding procedure for X70-L245 butt joint of pipeline steel.The weldability of steel was analyzed by Ceq and macro-structure, etc. Preheat and interpass temperautre were established. Joint design has been made. Visual examinations and X-ray and destructive tests were conducted in accordance with Q/SY XQ18——2002 and XQ-CS-JY-SPE-0010 standards after the completion of welding, so the result of every item meets the requirements of the relevant standards. And the results of macrostructure, the tension test and the charpy V-notch test are good,the welding joint is very safe.

关 键 词：管线钢 对接接头 焊接工艺 坡口设计 

分 类 号：TE973.3[石油与天然气工程—石油机械设备]