ElectricWeldingMachineVol.53No.1Jan.2023第53卷第1期2023年1月LNG储罐用ENiCrMo-6型焊条的国产化研制王庆江1，2，胡鹏亮1，2，郑庆铭1，2，刘满雨1，2，陈波1，2，徐锴1，2，武鹏博21.哈尔滨威尔焊接有限责任公司，黑龙江哈尔滨1500062.哈尔滨焊接研究院有限公司，黑龙江哈尔滨150028摘要：ENiCrMo-6型焊条主要用于9%Ni钢制液化天然气（LNG）储罐的焊接，其长期依赖进口导致生产成本较高、技术发展受限，实现国产化十分必要。介绍了国产镍基合金ENiCrMo-6型焊条的研制，选用纯镍焊芯和CaO-CaF2-TiO2渣系作为焊条药皮的基础渣系组合。对研制的ENiCrMo-6焊条进行焊接工艺性试验、微观组织观察和力学性能试验，结果表明其工艺性水平与进口焊条相当，熔敷金属和焊接接头的强度、塑性和韧性优良，满足9%Ni钢制LNG装置的设计和施工要求，其中-196℃低温冲击吸收能量远高于技术要求，可应用于实际工程。关键词：9%Ni钢；ENiCrMo-6焊条；熔敷金属；力学性能；全位置中图分类号：TG422.1文献标识码：A文章编号：1001-2303（2023）01-0112-06DomesticDevelopmentofENiCrMo-6ElectrodeforLNGStorageTankWANGQingjiang1,2,HUPengliang1,2,ZHENGQingming1,2,LIUManyu1,2,CHENBo1,2,XUKai1,2,WUPengbo21.HarbinWellWeldingCo.,Ltd.,Harbin150006,China2.HarbinWeldingInstituteLimitedCompany,Harbin150028,ChinaAbstract:ENiCrMo-6electrodeismainlyusedforweldingLNGplantmadeby9%Nisteelonlandandship.Itslong-termdependenceonimportleadstohighproductioncostandlimitedtechnologydevelopment,soit'snecessarytorealizethelo‐calization.Inthispaper,thedevelopmentofdomesticENiCrMo-6electrodeisintroduced.ThepurenickelcoreandCaO-CaF2-TiO2slagsystemareselectedasthebaseslagsystemoftheelectrodecoatingtomaketheelectrodemeettherequire‐mentsofengineeringapplicationwithsuitableforalternatingwelding,allpositionweldingandexcellentmanufacturability.Themanufacturability,microstructureandmechanicalpropertiesofthedevelopedENiCrMo-6electrodearestudied.There‐sultsshowthatitstechnologylevelisequivalenttothatofimportedelectrode,andthestrength,plasticityandtoughnessofthedepositedmetalandtheweldedjointareexcellentandcanmeetthedesignandconstructionrequirementsofthe9%NisteelLNGplant.Theimpactabsorbedenergyat-196...
