简介:摘要:60Si2Mn合金弹簧钢是应用广泛的硅锰弹簧钢,强度、弹性和淬透性较55Si2Mn稍高,该钢种适于铁道车辆、汽车拖拉机工业上制作承受较大负荷的扁形弹簧或线径在30mm以下的螺旋弹簧、板簧,也适于制作工作温度在250 ℃以下非腐蚀介质中的耐热弹簧以及承受交变负荷及在高应力下工作的大型重要卷制弹簧。该钢种用在关键重点部位较多,所以质量要求较高,本文对中心偏析的改善进行分析与实践应用,取得了较好的质量效果。
简介:摘要 某钢厂生产的小规格(Ф13-Ф14mm)60Si2Mn弹簧钢表面存在翘皮、划伤等缺陷,合格率仅85%,严重制约交货时间,增加生产成本。经过分析,弹簧钢表面缺陷的产生原因主要是钢坯角部扒皮质量不好和活套、裙板辊、裙板罩板等工装件使用维护不到位。通过提升钢坯扒皮质量和工装件使用、维护标准,可以减少钢材表面缺陷的产生,提高合格率到90%以上。
简介:摘要 近期淮钢特钢轧钢厂在生产供中原利达铁路轨道技术发展有限公司Ф14mm 60Si2Mn弹簧钢时出现批量性脱碳层超标。经分析,造成脱碳层超标的原因为生产过程中设备故障及更换导卫导致的坯料在炉时间长及在生产不正常状态下加热制度的不明确。从制度和工艺中提出改进措施,以改进其脱碳层指标,提高产品质量。
简介:TheballmillingofFe-24MnandFe-24Mn-6Simixedpowdershasbeenperformedbythehighenergyballmillingtechnique.ByemployingX-raydiffractionandMoessbauermeasurements.Theccmpositionevolutionduringthemillingprocesshasbeeninvestigated.TheresultsindicatetheformationofparamagneticFe-MnorFe-Mn-Sialloyswithametastablefccphaseasfinalproducts.whichimplythattheFeandMnproceedaco-diffusionmeenanismthroughthesurfaceoffragmentedpowders.Thethermalstabilityandcompositionevolutionoftheas-milledalloyswerediscussedcomparingwiththebulkalloy,.
简介:摘要:60Si2CrVAT弹簧钢性能优异,但是脱碳敏感性较高。本文针对该牌号弹簧钢生产弹簧过程中的脱碳机理进行了研究试验,验证了行业内关于该弹簧钢脱碳机理的相关结论,结合完全脱碳判定标准,制定了弹簧生产过程中的优化工艺,避免了该牌号弹簧钢在弹簧生产过程中产生严重的完全脱碳层
简介:High-strengthsteelshavebeenwidelyappliedtoautomotivechassisparts.Inordertoformcomplexshapes,highholeexpansionratesandhighformabilityarerequired.Dualphase(DP)steelhasagoodformability,butapoorholeexpansionrate.Inthiscircumstance,anotherkindofsteelwhichhasamicrostructureofferrite-bainite,ratherthanferrite-martensite,hasbeenfoundtobeanalternativesolution.ItiscalledFBsteel.ThissteelwithSi,CandMnadditionsareappliedinthisstudy.Atwo-stepcooling...
简介:TherearetwotpyesofphasetransformationsinFe-MnandFe-Mn-Sialloyswhenthetemperatureisdecreased,γ(fcc)→ε(hcp)martensitictransformation(MT)andparamagnetic-antiferromagnetictransition(AMT)ofγphase.Fromthethermodynamicpointofview,theformerusuallyappearsinaslightlyhighertemperaturerangethanthelatterbecauseifisgenerallyacceptedthatthemagnetictansitionhasasuppressingeffectonthethermallyinducedεmartensite(Satoetal.,1984.,BogachevandZvigintzeva,1976;Murakamietal.,1987:Yangetal.,1992)GartsteinandRobinkin(1979)eventhoughtthattheγ-εtransformationshouldbeterminatedbelowNeeltemperature(TN)duetothedecreaseoffreeenergyarisingfromtheAMTofγphase.However,someexperimentalresultshaeindicatedtheformationofεphasebelowT(LiandWayman,1994:Fujimori.1966).Inthepresentwert.thebehavorofγ-εtransformationbelowTNwasfurtherinvestigatedbyclectricalresistancemeasurements.
简介:Theeffectsofthefinalelectromagneticstirring(EMS)onthesolidificationstructureof60Si2CrVAThighstrengthspring(HSS)steelofcontinuouscasting(CC)billetshasbeenstudied.Theanalysisofthesolidificationstructureisbasedonthecomparisonbetweenthemacrostructure,microstructure,carbonsegregationanddefectsofthe60Si2CrVATbilletwithmold-electromagneticstirring(M-EMS)andthosewiththeM+finalsolidificationzoneelectromagneticstirring(F-EMS).ItisfoundthatthesolidificationstructureofthebilletwiththeF-EMSisimprovedwiththetightnessofthebilletandtheincreaseintheratiooftheequiaxedstructure,theinnerporosityandtheshrinkageareremarkablyreduced,andthattheratioofcentralcarbonsegregationsharplydecreases.Meanwhile,thesecondarydendritearmspacing(SDAS)isimproved,andtheratioofcentralequiaxedgrainconsiderablyincreases,whichresultsinfinergrains.Therefore,thequalityofthebilletisenhancedwiththeF-EMS.
简介:有一致形态学的新奇红射出的K2(Ge,Si)F6:Mn4+黄磷被一起沉淀方法综合。纯K2有P636阶段>除P3m1空间组以外的mc空间组就被Si的加入在K2在房间温度的GeF6根据XRD描述。薄片状的显示出的SEM图象和为K2GeF6:Mn4+和K2(Ge,Si)F6:Mn4+黄磷分别地。光致发光刺激(PLE)和光致发光(PL)在K2GeF6:Mn4+和K2(Ge,Si)F6:Mn4+系统。并且K2有Si的GeF6:Mn4+显示出一座强壮的山峰。同时水晶的地包围Mn4+变化能在这个氟化物系统影响腐烂时间。带的设备的颜色范围基于K2(Ge,Si)F6:Mn4+和K2分别地,GeF6:Mn4+到达了多达94.58%NTSC(国家电视标准委员会)和94.386%NTSC那基于氮化物红黄磷比那高得多。在K2(Ge,Si)F6:Mn4+黄磷的所有这些原来的特征作为为改善灯光和常规白LEDs的显示质量的红黄磷为潜在的应用是合乎需要的。
简介:TheX-raydiffractionpeak-shiftmethodwasintroducedintothedeterminationofdeformationfaultprobability(α)ofFe-Mn-SialloyswithvariousMncontentsandthermomechanicalcyclingnumbers.Thepreciselatticeconstantsrequiredwereobtainedbynumericalcalculationinsteadofusingstandardsamplewithoutanyfault.Theinfluenceofinternalstressonthedeterminedαhasbeenevaluated,andthecausedrelativeerrorwasdeterminedasabout4%andthusnegligible.TheresultsshowthatthedeformationfaultprobabilityincreaseswithdecreasingMn-contentandincreasingcyclenumber,whicharequalitativelyconsistentwiththoseresultsofPsfdeterminedbypeak-broadeningmethod.
简介:摘要:针对磁粉探伤过程中发现的材质为60Si2MnA的摇枕弹簧端圈产生裂纹的现象,通过对材料的化学成分、裂纹处宏观形貌、裂纹处微观形貌、显微组织、硬度、脱碳、晶粒度、非金属夹杂物等项点的理化检验,综合分析了引起端圈裂纹的影响因素,结果表明,裂纹位置存在非金属夹杂物,且淬火过程受端圈结构影响,端圈淬火应力较大,薄弱的夹杂物位置形成淬火裂纹。
简介:摘要:本研究探讨了高速列车用60Si2CrVAT钢弹簧材料的工艺、组织和性能,旨在通过优化热处理工艺和冷却速度,提高材料的硬度、强度和韧性。通过金相显微镜、扫描电子显微镜观察了该钢材的显微组织,同时进行了一系列力学性能测试,结果表明通过适当的工艺控制和组织优化,可以显著提高60Si2CrVAT钢的抗拉强度、韧性和抗疲劳性能,使其更适合高速列车弹簧应用。