轿车齿轮用钢热处理畸变的探讨

Bs=482BsCCT,+,,CrMoVB,B,B,,[6]Mo2B+,[6],+Mo2B,,(1)(3),MsBs,BsMs,5(1)3Cr21Mo21/4VCCT,CCT+10/s;01012/s;Ms410(2)3Cr21Mo21/4V30102/s400mm,,,:[1]ShewmonP,XueYH1EffectofHigh2PressureHydrogenonCrackGrowthinCarbonSteel[J]1Metall1Trans1A11991,22A:2703227071[2]1[M]1:,1986.[3]1[M]1:,1980:412461[4],,,1[M]1:,1999:36323641[5]RodnarRL,OhhashiT,JaffeRI.EffectsofMn2SiandPurityun2derDesignof315NiCrMoV,1CrMoVand2125Cr21MoBainiticAlloySteel[J]1Metall1Trans1A,1989,20A:144521460[6]1[M]1:,1980:28811,1,2(11,114002;21,):,,,,:;;;;:TG142141:A:025426051(2000)0920025203StudyonHeatTreatmentDistortionofSteelUsedforCarGearLIWei2juan1,DONGXi2chun1,XUXiang2qiu2(11MaterialDepartment,AnshanIronandSteelInstituteofTech1,Anshan114002,China;21ProcessDepartment,No11AutomobileFactoryGroup,ChangchunJilin)Abstract:Inthispaper,theeffectfactorsonheattreatmentdistortion,suchasmaterial,forgingandpreheattreatmentetc1havebeenstudied1TheresultsshowthatheattreatmentdistortionofdomesticgearsteelreachtotheleveloftheGermangearsteelbymeansofcontrollinggearsteelhardenabilityband,grainsizeandreducingoxygenandinclusioncontentaswellasisothermalannealingwithex2tra2heatafterforginginsteadofreheatnormalizing1Keywords:steelusedforgear;heattreatmentdistortion;hardenabilityband;inclusions;extra2heatisothermalannealing:(1966),,,,,,8:(024)238930007574:1999212223,,,,,,,,,1111351P,11351Pw(%)CSiMnPSCrAlO(10-6)012301280112016001800103501020010350180111001020010552011211211,2,4HRC52200092()w(%)CMnCrSiSPNiMoAl0102501010101010501090109010801060100911212,(LF),,LF,,,,VD100MPa,311213,NbAlN,Nb,113351P,95040min,,1280(010167ms-1,40)(60115h)114351P11351P2211351P351P33351P()b/MPaJ10(HRC)()()()ABCDK4000595595600303029151721000000710301821007333590740243025221140:J1010mm;K4=(-)/212351P351P1,()()2,,100m,30m2,2351Pace,bdf,,,,,3311311114[2]4,,,,,,,,311124,,,,,4HRC,,,,(2),6220009,,312,,,,Ms,,,,,,,,,,Ms,,,,,[1],,2832HRC,,,,,[1]4(4HRC),,,351P:[1]1[M]1:,1987:16121641[2]()[M]1:,1978:4511,1,2,2(11(),257062;21,257000):,,:;;;:TG142141;TG115121:B:025426051(2000)0920027202AnalysisonCrackofBoilerPipesWENJian2ping1,LIHai1,WENTao2,LUXin2(11MechanicalDepartment,UniversityofPetroleum(Huadong),DongyingShandong257062,China;21ShengliPetroleumAdministrationBureau,DongyingShandong257000,China)Abstract:Bymeansofanalysesonmacroscopicinspection,chemicalcomposition,mechanicalproperty,microstructureandfractography,thereasonofcrackingfailureofboilerpipesisshort2termoverheat1Preventedmeasuresareputforward1Keywords:mechanicalproperty;microstructure;fractography;overheat:(1956),,,10:1999212222,,,,539976h1712MPa,354,80%,,216m,12m,56,89mm1215mm,St4518(20G)11111125mm,45mm,,,,,,610mm,270mm1115mm,,,,1112St451820G11,St4518,;7220009