抗H2S腐蝕高強度X70MS埋弧焊耐蝕焊材的研制.pdf

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3、elopmentofsubmergedarcweldingmaterialforX70MSPipelineSteelofhighstrengthandresistingH2ScorrosionSpeciality：MaterialsengineerinName：WuPeijun(signatuInstructor：BiZongyue(signatuABS’l’RAC’I’AccordingtothecharacteristicsofX7

4、0MSPipelineSteelofhighstrengthandresistingH2Scorrosion，theresearchofthecorrosionmechanismofH2S、theinfluenceofthealloyandmicrostructureforresistingH2Scorrosionwasperformedrnleacicularferriteandgranularbainiteforweldmicros

5、tructure、theslagandthecompositionrangeofthemainalloyelementsforthewire、theslagcontentandbasicityrangeofthefluxweredesignedThesubmergedarCweldingwireNS1、NS2、NS3、NS4、ⅣitllresistingH2ScorrosionandaoptimizationfluxSJ101G4for

6、X70MSPipelineSteelofhighstrengthandresistingH2Scorrosionweredeveloped111esubmergedaleweldingdepositedmetalsbytheweldingwiresincouple誦Ⅱlthefluxpossessesquitehighyieldstrength(至510)、excellenttoughness(AKv(20℃)蘭54)、thelowha

7、rdnessotVmax蘭213)andtheexcellentpropertyofresistingH2ScorrosionThecracksintheHICtestandtheSSCCtestwerenotoccurredEspeciallywhentheforcereaches133％OSofthetensilestress，Thecrackswerealsonotoccurred，SOthepropertyofresisting

8、H2ScorrosionforthedepositedmetalsmeettherequirementsofX70MSpipelinesteelFurthermore，thebuttjointweldingtestandthesmallbatchinthelaboratoryusingsubmergedarCweldingwireandtheoptimizationfluxwereperformedtheresultsshowsthat

9、theweldingprocesseswerefine，thedesignedmicrostructuresandexcellentmechanicalpropertiesofweldingjointswereobtained，thefinepropertyofresistingH2Scorrosionwasalsogot11lesubmergedarCweldingmaterialissuitableforawiderangeofwe

10、ldingspeed，andwhentheweldingspeedis2m／minthepropertiesofweldingjointsmeettherequirementsoftechnicalspecificationsofAPISPECorder5LappendixHacidserviceconditionsforPSL2steel，theH2ScorrosionresistanceofNACETM0284—96andNACET