第40卷第4期压力容器2023年4月doi:■■■■■■■■■■■■■■■■■■■■10．3969/j．issn．1001－4837．2023．04．002试验研究N06200镍基合金管板与换热管焊接接头组织与性能研究武靖伟，王志刚，张建晓，王有银，王岑，张小许，车文斌，朱映宝，徐红(兰州兰石重型装备股份有限公司，兰州730314)摘要:采用氩弧焊丝ERNiCrMo－17对换热管(材料为SB－622N06200)与管板(材料为SB－564N06200)进行焊接试验。针对此材料的管－板焊接进行焊接工艺研究，通过金相组织观察、角焊缝厚度测量、拉脱力试验、晶间腐蚀试验对N06200镍基合金管板与换热管焊接接头进行分析。结果表明:采用第1层自熔+2层填丝所获得的管－板焊接接头成形良好，焊道均匀饱满;接头的角焊缝厚度均满足标准要求的1．2mm，接头的拉脱力和晶间腐蚀率均高于管板和换热管母材;接头焊缝组织为胞状晶、柱状树枝晶和等轴晶奥氏体组织，枝晶生长方向随机，等轴晶可抑制热裂纹的产生;接头焊缝区域硬度明显高于其他区域，硬度曲线呈“跳跃”特征。关键词:管板－换热管;N06200合金;焊接;微观组织中图分类号:TH49;TH140．7;TG115．6文献标志码:AStudyonmicrostructureandmechanicalpropertiesofweldedjointbetweenN06200nickelbasealloyheatexchangetubeandtubesheetWUJingwei，WANGZhigang，ZHANGJianxiao，WANGYouyin，WANGCen，ZHANGXiaoxu，CHEWenbin，ZHUYingbao，XUHong(LanzhouLSHeavyEquipmentCo．，Ltd．，Lanzhou730314，China)Abstract:Weldingtestwascarriedoutontheweldedjointbetweentheheatexchangetube(tubematerialSB－622N06200)andtubesheet(tubesheetSA－564N06200)usingarcargonweldingwireERNiCrMo－17．Theweldingprocessofheatexchangetube-to-tubesheetweldingofthismaterialwasstudied，andtheweldedjointofN06200nickel-basealloytubesheetandheatex-changertubewasanalyzedbymetallographicmicrostructureobservation，filletweldthicknessmeasurement，pull-outforcetestandintergranularcorrosiontest．Theresultsshowthattheshapeoftheobtainedtubesheet-to-tubeweldedjointisgoodandtheweldbeadisfullusingoneself-meltinglayerandtwowirefillerlayers．Thefilletweldthicknessoftheweldedjointsatisfiesthestand-ardrequirementof1．2mm．Theboththepull-outforceandcorrosionrateofthejointaremorethanthebasematerialoftheheatexchangetubeandtubesheet．Them...
