X80管线钢在线用焊条的研制  

Development of electrode used for X80 pipeline steel on production line

作　　者：张敏[1] 席敏敏[1] 张翔[1] 褚巧玲[1] 郑雯[1] 

机构地区：[1]西安理工大学材料科学与工程学院,西安710048

出　　处：《焊接学报》2013年第9期9-12,113,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51274162);国家高技术研究发展计划资助项目(2013AA031303);陕西省基础研究计划资助项目(2012JM6003);西安市科技计划资助项目(CX12163)

摘　　要：研制了一种X80管线钢在线用碱性低氢焊条,此焊条主要用于X80管线钢管管对接环焊缝打底焊及管线钢的焊补.确定了焊条药皮各组分的合理配比,合理选择焊芯并进行了一系列焊接试验及焊接接头力学性能和金相测试.结果表明,所研制焊条引弧及稳弧性能良好、飞溅小、脱渣好,焊道成形良好;B焊条焊接接头力学性能优异,屈服强度达640 MPa,抗拉强度达804 MPa,冲击吸收功达120 J;B焊条所得焊缝组织为针状铁素体和粒状贝氏体,其比例恰当,与母材组织匹配较好.A kind of electrode with low hydrogen used for X80 pipeline steel on production line was developed and applied for the backing and repair welding of X80 pipeline steel. The proper proportions of the electrode components were determined,and a series of welding experiments and subsequent test for microstructure and mechanical properties of welded joints were carried out. The results show that with the developed electrode,the arc ignition and arc stability was good,little spatter happened,the welding slag was easy to remove and the weld appearance was excellent. The mechanical properties of joint made with B electrode were superior with the yield strength up to 640 MPa,tensile strength 804 MPa and impact energy value 120 J. The microstructure of the weld metal with B electrode consisted of acicular ferrite and granular bainite with appropriate proportion and matched well with parent material.

关 键 词：X80管线钢 焊条药皮 工艺性能 力学性能 金相组织 

分 类 号：TG422.1[金属学及工艺—焊接]