■■■■■■■■■■■■■■试验研究DOI:10.11973/fsyfh-202212008S22053双相不锈钢等离子弧焊焊接接头的力学性能与耐蚀性唐威1,郑峰2(1.山西机电职业技术学院,长治046011;2.西安工业大学材料与化工学院,西安720021)摘要:采用等离子弧焊(PAW)深熔焊工艺对10mm厚的S22053双相不锈钢进行了焊接,采用显微组织观察、力学性能试验和腐蚀试验,研究了S22053双相不锈钢焊接接头的力学性能和耐蚀性。结果表明:焊接接头的强度达到814MPa,焊缝及热影响区的-40℃冲击吸收功分别为58J和72J;焊缝及热影响区的铁素体体积分数分别为69%和62%;ASTMA923A法腐蚀测试表明,焊接接头焊缝和热影响区的耐蚀性下降,ASTMA923C法检测表明,其未出现明显的点蚀现象,平均腐蚀速率为2.761mg/(dm2·d)。结果说明S22053双相不锈钢焊接接头具有良好的综合力学性能及耐蚀性,等离子深熔焊可用于S22053双相不锈钢的焊接制造。关键词:S22053双相不锈钢;等离子弧焊(PAW);显微组织;力学性能;耐蚀性中图分类号:TG402文献标志码:A文章编号:1005-748X(2022)12-0048-06MechanicalPropertiesandCorrosionResistanceofS22053DuplexStainlessSteelWeldedJointbyPlasmaArcWeldingTANGWei1,ZHENGFeng2(1.ShanxiMechanicalandElectricalVocationalandTechnicalCollege,Changzhi046011,China;2.SchoolofMaterialsandChemicalEngineering,Xi'anUniversityofTechnology,Xi'an720021,China)Abstract:The10mmthickS22053duplexstainlesssteelwasweldedbyplasmaarcwelding(PAW).ThemechanicalpropertiesandcorrosionresistanceofS22053duplexstainlesssteelweldedjointwerestudiedbymicrostructureobservation,mechanicalpropertytestandcorrosiontest.Theresultsshowedthatthestrengthofweldedjointreached814MPa,andtheimpactabsorptionenergyat-40℃ofweldandheataffectedzonewas58Jand72J,respectively.Thevolumefractionofferriteinweldandheataffectedzonewas69%and62%,respectively.CorrosiontestbyASTMA923Amethodshowedthatthecorrosionresistanceofweldandheataffectedzoneofweldedjointdecreased.AftertestingbyASTMA923Cmethod,therewasnoobviouspittingcorrosionphenomenon,andtheaveragecorrosionratewas2.761mg/(dm2·d).TheresultsindicatedthatS22053duplexstainlesssteelweldedjointhadgoodcomprehensivemechanicalpropertiesandcorrosionresistance,andplasmadeeppenetrationweldingcou...
