电焊机2017，Vol.47Issue(9)：115-119,5.DOI:10.7512/j.issn.1001-2303.2017.09.26
X70管线钢焊接用自保护药芯焊丝研制
Research on the self-shielded flux-cored wire for welding of X70 pipeline steel
摘要
Abstract
Three kinds of TiO2-MgO-Al2O3 slag system self-shielded flux-cored wires with different components are used to study the properties of the depositedmetal,and the T50SS-3 flux-cored wire is obtained.The X ray inspection,metallographic microscope,SEM are used to study the properties of the welded joints,including the macrostructure,microstructure and fracture appearance of the welds,and the distribution,size and composition of the inclusions.The results show that there are no defects such as lack of penetration,undercut,pores,slag and so on in the welds.The microstructure belongs to low dispersion bainite + a small amount of ferrite,intermediates are austenite grains,non-metallic inclusions are aluminum nitride,whose the nucleation occurs with zirconia,and distribute uniformly.关键词
X70管线钢/自保护焊接/药芯焊丝/微观组织/非金属夹杂Key words
X70 pipeline steel/self-shield welding/flux-cored wire/microstructure/non-metallic inclusion分类
矿业与冶金引用本文复制引用
刘凤美,易江龙,郭春富,万娣,牛犇,王键益..X70管线钢焊接用自保护药芯焊丝研制[J].电焊机,2017,47(9):115-119,5.基金项目
广州市科技计划项目(201508030024) （201508030024）
广东省科学院项目(2016GDASPT-0205) （2016GDASPT-0205）
广东省项目(2012A061400011,2015B050502005,2014B050503004) （2012A061400011,2015B050502005,2014B050503004）
