管道环焊缝采用铜衬垫根焊及焊缝渗铜研究  

Research on pipeline girth welding joint with copper infiltration and copper back-up shoes root welding

作　　者：梁君直[1] 黄福祥[1] 靳海成[1] 吴江桥[1] 

机构地区：[1]中国石油天然气管道局科学研究院,河北廊坊065001

出　　处：《电焊机》2009年第5期74-77,共4页Electric Welding Machine

摘　　要：针对采用带铜衬垫的管道气动内对口器进行管道环焊缝根焊(打底焊接)时,对带铜衬垫根焊的焊缝不同位置铜含量进行了测量。为了精确分析渗铜对焊缝力学性能的影响,选用荧光光谱测定仪对焊接试验的焊缝不同位置铜含量进行了精确测量,并通过相关的材料性能试验定性评价了渗铜对焊缝金属力学性能的影响。结果表明,由于受焊接高温影响,铜原子的扩散造成焊缝根焊层铜含量有微量增加。为了评价铜含量增加对焊缝力学性能的影响,还对带铜衬垫的焊缝试件进行了拉伸、冲击和硬度等力学性能试验,结果证明铜含量在一定范围内,并不影响焊缝金属的强度和韧性等力学性能。When the pipe liner pneumatic internal clamp device with a copper backing was carrying out the circumferential backing wehting,the seams in the different positions of the copper content were accurately measured. In order to analyze precisely of the copper-weld on the mechanical properties,using the fluorescence spectrometry detector to test the welding seam of the copper content in different locations and making the qualitative evaluations of the copper-weld metal mechanical properties through the related materials performance, testing.The results show that due to the high welding temperature,the backing welding-seam copper trace has increased by the proliferation of the copper atoms.In order to evaluate the influence of much more copper content on the welding line＇s mechanical properties,the paper also take the experiments with chrome-ho of the copper welding line samples of shock resistance,hardness and so on.The results proved that if the copper content was controlled in a certain extent,Welding seam＇s strength, toughness,and other mechanical properties would be able to be improved.

关 键 词：管道 内对口器 铜衬垫 渗铜 环焊缝 力学性能 

分 类 号：TG441[金属学及工艺—焊接] TE832[石油与天然气工程—油气储运工程]