T型焊接接头的浅表层缺陷研究.pdfVIP

HotWorkingTechnology2023,Vo1.52,No.5

失效分析

T型焊接接头的浅表层缺陷研究

邱培现，刘英宗²，陈北平，段卫军，汪倩²，李远星2

材料科学与工程学院，四川成都610031)

摘要：通过对某T型焊接接头的浅表层缺陷调研，分析了该接头在各工艺阶段（焊接态、退火态、打磨态和喷丸

态)的表面状态。结果表明：该缺陷为打磨和喷丸过程中形成的毛刺和闭合的氧化膜夹杂，工艺不合理是缺陷形成的主

要原因。手动打磨平直表面时，氧化膜和夹杂可以被完全去除，然而在打磨T型接头焊缝表面时，因为空间位置狭小，

局部位置氧化皮无法被清理干净，部分在喷丸时被打人到基体中形成闭合的氧化膜夹杂，部分以毛刺的形式残留在表

面。根据分析结果，提出了采用交叉打磨的方式，并在打磨后采用长时间喷丸来改善浅表层缺陷。

关键词：T型接头；焊接缺陷；打磨；喷丸

D0I:10.14158/ki.1001-3814

中图分类号：TG441.7文献标识码：A

StudyonShallowSurfaceDefectsofT-typeWeldedJoints

QIUPeixian,LIUYingzong’,CHENBeiping,DUANWeijun,WANGQian²,LIYuanxing?

(1.CRRCQingdaoSifangRollingStockCo.,Ltd.,Qingdao266311,China;2.KeyLaboratoryofAdvancedTechnologiesof

Materials,MinistryofEducation,SchoolofMaterialsScienceandEngineering,SouthwestJiaotongUniversity,Chengdu

610031,China)

Abstract:ThroughtheinvestigationofshallowsurfacedefectsofaT-typeweldedjoint,thesurfacestateofthejointin

eachprocessstage(weldingstate,annealingstate,grindingstateandshotpeeningstate)wasanalyzed.Theresultsshowthat

thedefectsareburrsandclosedoxideinclusionformedduringgrindingandshotpeening.Themainreasonofthedefectsis

unreasonableprocess.Whentheflatsurfaceismanuallypolished,theoxidefilmandinclusionscanbecompletelyremoved.

However,theoxidescaleinlocalpositioncannotbecleanedduetonarrowspaceduringgrindingoftheweldsurfaceof

T-joint.Someoftheoxidescaleisinjectedintothematrixtoformclosedoxideinclusionduringshotpeening,andsome

remainsonthesurfaceintheformofburr.Accordingtotheresults,thecrossgrindingmethodwasproposedandthelongshot

peeningaftergrindingwasusedtoimprovetheshallowsurfacedefects.

Keywords:T-