GMAW焊接的HTP高铌X80管线钢管的纵向应变容量  

Longitudinal Strain Capacity of GMAW Welded High Niobium(HTP) Grade X80 Steel Pipes

作　　者：马小芳 

机构地区：[1]中国石油集团石油管工程技术研究院,西安710077

出　　处：《焊管》2013年第11期75-80,共6页Welded Pipe and Tube

摘　　要：对低C高Nb微合金化的HTP工艺X80管线钢管GMAW焊接纵向环焊缝力学性能和断裂性能做了定量分析,试验使用X80级1 219 mm×22 mm UOE直缝埋弧焊管,在弯曲宽板试样的焊接中心线和HAZ表面开缺口试验,对母材和焊缝的拉伸性能、屈服强度过匹配、V形缺口夏比冲击韧性、CTOD韧性、宽板拉伸试验结果进行了分析。结果表明,-20℃下,高Nb HTP管线钢管可以达到很大的纵向后屈服应变,同时证明了8%的过匹配是比较合理的要求。This paper presents the results of an experimental study aimed at quantifying the mechanical and fracture properties of GMAW girth welds in an HTP low carbon high Nb micro-alloyed, Ф1 219 mm by 22 mm wall longitudinal welded Grade XS0 steel pipes. The weld centedine and HAZ surface notched curved wide plate tensile tests have demonstrated that overmatched girth welds in high Nb HTP steel pipes can accommodate significant longitudinal post yield strains at -20 ℃. It was also demonstrated that a minimum yield strength overmatch of 8% can be used as a rational requirement.

关 键 词：焊管 管线钢 X80 高Nb 应变容量 

分 类 号：TE973[石油与天然气工程—石油机械设备]