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1、寶鋼雙相不銹鋼B2205（PlatesheetandcoilforduplexStainlessSteelB2205）---------------------------------------------------------------------------------------------------------------------------------1、B2205概述BriefintroductionofB2205雙相不銹鋼B2205是由奧氏體和鐵素體兩相組成的雙相不銹鋼，具有優(yōu)良的耐腐蝕性能和力學性能，其屈服強度是300系列不銹鋼的兩倍，被廣泛應用于油氣、石
2、化、橋梁、海水淡化以及化學品船等行業(yè)。DuplexstainlesssteelB2205ischaracterizedbyaferrite-austenitemicrostructure,whichleadstoagoodcombinationofcorrosionresistanceandmechanicalproperties.TheyieldstrengthofB2205isnearlytwiceasthatof300seriesstainlesssteel.B2205iswidelyusedinindustrysuchasoilandgas,petrochemical,bri
3、dge,seawaterdesalinization,chemicalcargoshipandsoon.圖1雙相不銹鋼B2205典型組織Figure1TypicalmicrostructureofB22052、相關標準Relatedstandards?GB2437-2007022Cr22Ni5Mo3N、022Cr23Ni5Mo3N；GB24511-2009S22253，S22053?UNSS31803，S32205?EN1.4462共6頁第1頁3、化學成分Chemicalcomposition表1B2205化學成分Table1ChemicalCompositionofB2205化學成
4、分，wt％，典型值牌號標準號Chemicalcomposition,wt%,TypicalvaluesSteelgradeInternationalStandardsCNCrNiMoS318030.020.1621.55.32.8B2205S322050.020.17225.53.14、力學性能Mechanicalproperties表2B2205退火態(tài)力學性能Table2MechanicalpropertiesofB2205insolutionannealedstate力學性能典型值（TypicalMechanicalProperties）厚度（mm）屈服強度(MPa)抗拉強度(M
5、Pa)牌號延伸率(%)硬度(HV)ThicknessYieldStrengthTensileStrengthElongationHardnessRp0.2RmP(15mm)55076846225B2205H(4mm)57081530230C(0.6mm)62388930250表3B2205退火態(tài)高溫力學性能Table3MechanicalpropertiesathightemperatureofB2205forsolutionannealedproduct最小值（Minimumvalues)典型值(Typicalvalues)溫度(℃)R0.2(MPa)Rm(MPa)EL(%)R0.
6、2(MPa)Rm(MPa)EL(%)10037063025453717371503456002543368335200330580224056653225032057020395658293003105602037365528共6頁第2頁300250200150Akv(J)100500-200-150-100-50050Temperature(℃)圖2不同溫度下B2205的沖擊功（試樣尺寸10×10mm，Charpy-V）Figure2Typicalimpactstrengthatdifferenttemperature(Specimensize:10×10mm，Charpy-V)5
7、、耐腐蝕性能Corrosionresistance5.1耐點腐蝕性能Pittingcorrosionresistance圖3按照ASTMG150測試獲得的B2205臨界點蝕溫度（CPT）Figure3Criticalpittingtemperature(CPT)ofB2205measuredaccordingASTMG150表4按照ASTMA92306C測試獲得的B2205點腐蝕速率Table4PittingcorrosionrateofB2205acco
