第39卷第11期压力容器2022年11月doi:■■■■■■■■■■■■■■■■■■■■10．3969/j．issn．1001－4837．2022．11．004试验研究分离器筒体镍基C276带极埋弧堆焊工艺研究及应用刘鸿彦，孙修圣，杜永勤，李卫华(南京宝色股份公司技术中心，南京211178)摘要:采用带极埋弧堆焊对SA302Gr．B试板进行镍基合金C276堆焊工艺评定，依照NB/T47014及技术协议要求对堆焊层的弯曲、硬度、化学成分及耐蚀性能指标进行了检测，试验结果表明，选用型号为EQNiCrMo－3/NSAS3－50BS的焊带/焊剂组合进行过渡层堆焊，EQNiCrMo－4/ESA－FB2B的焊带/焊剂组合进行耐蚀层堆焊，可以获得性能优良的堆焊层，焊道成型平整。按照ASTMG28A法对耐蚀层焊态试样与固溶态试样进行腐蚀率检测，结果分别为9．76，7．55mm/a，满足技术协议对腐蚀率比值≤1．5及JB/T4756对腐蚀率≤12mm/a的要求。根据焊接工艺评定制定焊接工艺规程，对分离器筒体内壁进行EQNiCrMo－3+EQNiCrMo－4带极堆焊，采用纵向压道方式进行，通过工装约束、分区对称施焊以及预热、热处理等工艺措施，筒体堆焊变形得以控制，产品的堆焊质量得以保证。关键词:分离器;筒体内壁;镍基合金;纵向堆焊;带极埋弧堆焊中图分类号:TH49;TG455文献标志码:AStudyandapplicationofnickel-baseC276SAWstripsurfacingtechnologyforseparatorcylinderLIUHongyan，SUNXiusheng，DUYongqin，LIWeihua(NanjingBaoseCo．，Ltd．，TechnicalCenter，Nanjing211178，China)Abstract:Thenickel-basealloyC276surfacingprocessofSA302Gr．Btestplatewasevaluatedbysubmergedarcelectrodesurfacingmachine．Thebending，hardness，chemicalcompositionandcorrosionresistanceofsurfacinglayerweretestedaccordingtoNB/T47014andtechnicalagreementrequirements．ThetestresultsshowthatthesurfacinglayerhasexcellentperformanceandtheweldbeadswereformedsmoothlywhenEQNiCrMo－3/NSAS3－50BSandEQNiCrMo－4/ESA－FB2Bwereselectedforthetransitionlayersurfacingandthecorrosionresistantlayersurfacing．Thecorrosionrateofas-weldedandas-solutionedspecimensofcorrosionresistantlayerweredetectedaccordingtoASTMG28A．Theresultswere9．76mm/aand7．55mm/arespectively，whichmeettherequirementsoftechnicalagreementforcorrosionrateratio≤1．5andJB/T4756forcorrosionrate≤12mm/a．Theweldingprocedurewasformulatedtoguidethes...
