X100管线钢埋弧焊接头力学性能的研究  

Study on the welded joint mechanical properties of X100 pipeline steel by submerged arc welding

作　　者：李继红[1] 陈飞绸[1] 刘斌 张敏[1] 

机构地区：[1]西安理工大学焊接研究室,陕西西安710048 [2]宝鸡石油钢管研究院,陕西宝鸡721008

出　　处：《焊接技术》2013年第6期15-18,85,共4页Welding Technology

基　　金：陕西省自然科学基金资助项目(2012JM6003);西安市科技计划项目(CX1250②)

摘　　要：通过对X100管线钢3种接头硬度、拉伸性能、低温(-10℃)冲击韧度的测试及冲击断口SEM、能谱分析,结果表明,熔池发生高温冶金反应时,将熔渣中的氧化物夹杂带入焊缝,破坏了焊缝金属的连续性。焊缝在受到切应力的作用下,容易在夹杂物处引发裂纹,在周围的区域产生解理断裂。Many tests and analysises were conducted on three welded joints of X100 pipeline,which were steelhardness test,stretch performance test,low temperature(-10 ℃) shock toughness of test,the shock fracture SEM and energy spectrum analysis.The results indicated that when high temperature metallurgy reaction was occurred in the molten pool,oxides inclusions were taken into weld,and continuity of weld metal was damaged.As a consequence,welds in the role of shear stress,the weld metal inclusions easily lead to cracks in the area around the cleavage fracture,excessive alloying did not play a tough role,and the presence of refractory Al 2 O 3 inclusions make weld performance reduced dramatically.

关 键 词：X100管线钢 冲击韧性 夹杂物 

分 类 号：TG407[金属学及工艺—焊接]