焊管Issue(12)：5-9,5.
X100螺旋埋弧焊管焊接接头冲击韧性研究
Research on Impact Toughness of X100 SAWH Pipe Welded Joint
摘要
Abstract
In this paper,the impact toughness of X100 SAWH pipe welded joint was tested by using drop weight tear test(DWTT) method at low temperature,and the fracture feature and microstructure were analyzed. The results showed that the impact toughness along wall thickness does not change obviously. The impact toughness changes greatly from weld,heat affected zone to base metal,and the impact toughness of base metal is the highest about one time compared to those of the weld and heat affected zone,and the impact toughness of weld is slightly higher than that of heat affected zone. The fracture feature displays large and deep size dimple in base metal,uniform and shallow size dimples in weld,and mainly to the small size dimple with a small amount of the large size dimple in heat affected zone. The large size bar or round M-A island make impact toughness decrease.关键词
焊接/螺旋埋弧焊管/冲击韧性/M-A组织Key words
welding/SAWH pipe/impact toughness/M-A microstructure分类
矿业与冶金引用本文复制引用
张建勋,毕宗岳,孙茜..X100螺旋埋弧焊管焊接接头冲击韧性研究[J].焊管,2013,(12):5-9,5.基金项目
国家科技支撑计划课题，超高强度油气输送管材关键技术研究（2011BAE35B01)。 （）
