高强度精轧螺纹钢筋的组织与性能

2002-09-23G19980615091946-1961-24320033JournalofNortheasternUniversityNaturalScienceVol.24No.3=============================================================Mar.20031005-3026200303-0268-0411121.1100042.114001σ0.2σb1080MPa1230MPaTG142A2070208032mmσ0.2σb735MPa900MPa12σ0.2σb850MPa1080MPaδ5≥8%2311WAW-200032mm500mmVersamat-2HVA-10A49NPhilipsEM4001Table1ChemicalcompoSitionoffiniShingrollingrebar4CSiMnCrBPSTiMoVNb0.431.770.920.0260.0240.1800.2000.461.740.900.0260.0180.1250.471.730.680.460.0020.0170.0140.00370.0570.0020.0020.720.491.270.130.0150.0150.481.700.950.400.0020.0120.0050.1900.170256111140.7%222σ0.2800MPaσb1000MPaδ57%σ0.2σb1080MPa1230MPaδ57%200MPa2Table2TenSilepropertieSoffiniShingrollingrebarσ0.2MPaσbMPaδ5%85010801434~58251040105~6105011601310113012701010119012891110σ0.2σb1080MPa1230MPaδ57%2121~312323ig42The5i6roStr76t7reSoffiniShingrollingrebarpro876e8b9:nShante5p6orepro6eSSab23ig42The5i6roStr76t7reSof;apaneSefiniShingrollingrebarab3ig4The5i6roStr76t7reSof:nShanfiniShingrollingrebarpro876e8b9ne=pro6eSSab962312~6mm20%~60%4~510200MPa++σ0.2σb1080MPa1230MPaδ57%2#4376HV356HV321HV282HV$%&’($)*+,-./+01*2.3+4+552433&5624,+01&4&5*&4’.077&4’.+82.5379HV340HV345HV6mm61%4mm44%12mm94%380~410HV43#9TemperCore5~8100~300MPaσ0.2850MPaσ0.2850MPaσ0.2930MPaδ58%12m#2200~300MPa0722491020~50nm51μmΔσEkyd-124~510100~200MPa100MPa5TEMFig.5TheTEMmicrographoffiniShingrollingrebarproducedbythenewproceSS412σ0.2σb1080MPa1230MPaδ57%3200~300MPa1M1997.34-35FuZBCaoYZ.TheassemblyofironandsteelresearchfruitM.ShenyangLiaoningScienceandTechnologyPress1997.34-35.2D2000HuangHD.ResearchonmicrostructuresandpropertiesofhighstrengthfinishingrollingrebarD.ShenyangNorth-easternUniversity2000.3D2000LeiYX.Researchonmicrostructuresandpropertiesofhighstrengthhot-rollingrebarD.ShenyangNortheasternU-niversity2000.4M1992.45-50ZhangSH.PhysicalmetallurgyofironandsteelM.BeijingMetallurgicalIndustryPress1992.45-50.5VladCM.Acomparisonbetweenthetemprimarandtemp-coreprocessesforproductionofhighstrengthrebarA.ProceedingsofanInternationalConferenceonHSLASteelsCBeijingASM1985.909-912.6FrommanKVladCM.Mechanicalandtechnologicalprop-ertiesoftemprimarweldablehighstrengthrebarA.Pro-ceedingsofanInternationalConferenceonHSLASteelsC.BeijingASM1985.901-907.7YeSFLiuKShiZHetal.TheinterruptedacceleratedcoolingprocessafterhotrollingfordeformedreinforcingbarsA.ProceedingsofanInternationalConferenceonHSLASteelsC.BeijingASM1985.885-891.8LiuK.DevelopmentofHSLArebarsteelsinChinaA.ProceedingsoftheSecondInternationalConferenceonHSLASteelsC.BeijingTMS1990.37-41.9TakitaniKYamagataMKurokawaHetal.InductionheatingprocessforproductionofquenchedandtemperedseamlesstubulargoodsJ.I&SM1979826-32.10BruceEUrbandPE.ContinuousinductionheattreatingofpipeandtubulargoodsfortheoilindustryJ.IndustrialHeating1983420-24.MicrostructureandMechanicalPropertiesofHighStrengthFinishingRollingRebarsBAIYu-guang1LIUChun-ming1RENHai-peng1ZHANGXiao-gang2SchoolofMaterials&MetallurgyNortheasternUniversityShenyang11[e-mail]ureandmechanicalpropertiesofoverseaanddomestichighstrengthfinishingrollingrebarwerestud-ied.Theresultsshowthatoverallpropertiesofoverseafinishingrollingrebararebetterthanthoseofthedomesticonesproducedbythetempercoreprocess.Theoverseafinishingrollingrebarshowhighstrengthgoodtoughnessfinegrainsanddeephard-enedlayer.ThroughmodificationofalloycompositionincludingadditiongmicroalloyingelementsandanewheattreatmenttheoverallpropertiesoffinishingrollingrebarproducedbyAnshanIronandSteelCompanywereremarkablyimprovedandhavereachedorexceededthehighestlevelofthoseoftheoverseaproducts.Theremarkablyimprovedpropertiesweresuggestedcomingfromthegrainrefiningandprecipitationstrengthening.KeywordshighstrengthfinishingrollingrebarmicrostructuremechanicalpropertiesfinegrainstrengtheningprecipitationstrengtheningReceivedSeptember2320021723