X80管线钢闪光对焊热模拟试验  

X80 PIPELINE STEEL FLASH BUTT WELDING THERMAL SIMULATION TEST

作　　者：王程明 孙晓冉 赵轶哲 赵楠 宋月 谷秀锐 Wang Chengming;Sun Xiaoran;Zhao Yizhe;Zhao Nan;Song Yue;Gu Xiurui(HBIS Materials Technology Researoh Institute,Shijiazhuang 050000,Hebei)

机构地区：[1]河钢材料技术研究院,河北石家庄050000

出　　处：《河北冶金》2023年第12期56-59,共4页Hebei Metallurgy

摘　　要：X80管线钢是目前应用最广泛的油气运输材料,因需满足长时间、长距离的服役条件,要求其具有更高的焊接性能,而闪光对焊技术由于焊接质量好、效率高,可满足X80管线钢的焊接需要。利用Gleeble-3800热模拟试验机对X80管线钢进行了闪光对焊模拟试验,采用金相显微镜观察焊缝、热影响区及母材处金相组织,采用显微维氏硬度计测定了各区硬度,确定了最优焊接参数。结果表明:在Gleeble热模拟试验机进行闪光对焊模拟试验,模拟焊接效果良好;不同工艺参数下焊接接头焊缝处金相组织为贝氏体,热影响区组织为贝氏体和铁素体,母材为铁素体和珠光体组织;不同焊接参数下,试样热影响区硬度最高,焊缝区次之,母材硬度最低;为获得优异的焊接接头,最优焊接参数为闪光速度1 mm/s、闪光流量6 mm。X80 pipeline steel is the most widely used oil and gas transportation material at present,which requires it to have higher welding performance due to the long-term and long-distance service conditions,and the flash butt welding technology can meet the welding needs of X80 pipeline steel due to its good welding quality and high efficiency.The Gleeble-3800 thermal simulation testing machine was used to carry out the flash butt welding simulation test of X80 pipeline steel,the metallographic structure of the weld,the heat-affected zone and the base metal was observed by metallographic microscope,and the hardness of each zone was measured by microscopic Vickers hardness tester to determine the optimal welding parameters.The results show that the flash butt welding simulation test is carried out on the Gleeble thermal simulation testing machine,and the simulated welding effect is good,the metallographic structure of the weld joint is bainite,the heat affected zone is bainite and ferrite,and the base metal is ferrite and pearlite.Under different welding parameters,the hardness of the heat affected zone of the sample is the highest,followed by the weld zone,and the hardness of the base metal is the lowest.To obtain excellent welding joints,the optimal welding parameters are flash speed 1 mm/s and flash flow 6 mm.

关 键 词：X80管线钢 闪光对焊 焊缝 热影响区 闪光速度 闪光流量 维氏硬度 

分 类 号：TG441.3[金属学及工艺—焊接]