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1、45鋼熱處理油冷過(guò)程分析摘要:45鋼是中碳優(yōu)質(zhì)結(jié)構(gòu)鋼，Wc=0.45%，冷熱加工性能都不錯(cuò)，機(jī)械性能較好，且價(jià)格低、來(lái)源廣，所以應(yīng)用廣泛。常應(yīng)用于小截面、中載荷的調(diào)質(zhì)件，如主軸、曲軸、齒輪、連桿、鏈輪等，它的最大弱點(diǎn)是淬透性低，截面尺寸大和要求比較高的工件不宜采用[1]。對(duì)于性能要求高的零件，必須進(jìn)行調(diào)質(zhì)處理。而對(duì)45鋼進(jìn)行調(diào)質(zhì)熱處理，為了得到回火索氏體，而使其具有良好的綜合力學(xué)性能。本文研究課題通過(guò)實(shí)驗(yàn)和軟件模擬，包括對(duì)45鋼熱處理油淬以及對(duì)熱處理前后45鋼的力學(xué)性能測(cè)試并進(jìn)行前后對(duì)比，同時(shí)與水淬進(jìn)行比較，由
2、于工件在淬火過(guò)程中因內(nèi)外溫差會(huì)導(dǎo)致熱應(yīng)力和組織應(yīng)力的產(chǎn)生，利用有限元ANSYS軟件對(duì)45鋼熱處理油淬過(guò)程的溫度場(chǎng)進(jìn)行模擬，分析工件的各個(gè)部分在熱處理油淬過(guò)程中的溫度變化情況，為優(yōu)化熱處理工藝，使工件經(jīng)熱處理后獲得優(yōu)良的性能提供一定的依據(jù)。關(guān)鍵詞：45鋼，熱處理，力學(xué)性能，溫度場(chǎng)模擬IHeattreatmentof45steeloilcoolingprocessanalysisAbstract:45steeliscarboninthehigh-qualitysteel,Wc=0.45%,hotandcoldpro
3、cessingperformanceisgood,bettermechanicalproperties,andlowprice,widesource,sowidelyused.Oftenusedinthesmallcrosssection,theloadofconditioningparts,suchasmainshaft,crankshaft,gear,connectingrod,sprocket,etc.，Itisthebiggestweaknessoflowhardenability,sectionsiz
4、eandrequirehigherartifactsshouldnotbeused[1].Forthehighperformancerequirementsofparts,conditioningtreatmentmustbecarriedout.Andtemperingheattreatmentof45steel,inordertogettemperedsorbiteandmakeithasgoodcomprehensivemechanicalproperties.Thispaperresearchtopic
5、throughexperimentandsoftwaresimulation,includingheattreatmentoilquenchingof45steelandthemechanicalpropertiesof45steelbeforeandaftertheheattreatmenttestandcomparedbeforeandafter,atthesametimecomparedwithwaterquenching,becauseoftheworkpieceduringquenchingbecau
6、seofinternalandexternaltemperaturedifferencewillleadtothegenerationofthermalstressandorganizationstress,usingthefiniteelementANSYSsoftwareof45steeloilquenchingheattreatmentprocess,tosimulatethetemperaturefieldoftheanalysisofvariouspartsoftheworkpieceinthepro
7、cessofoilquenchingheattreatmenttemperature,inordertooptimizetheheattreatmentprocess,theworkpieceafterheattreatmenttoobtaingoodperformancetoprovideacertainbasis.Keywords:45steel,heattreatment,mechanicalproperties,thetemperaturefieldsimulationI目錄1緒論1245鋼熱處理工藝過(guò)
8、程研究32.145鋼簡(jiǎn)介32.2熱處理工藝方案確定32.2.1熱處理工藝的概念32.2.2淬火加熱溫度及保溫時(shí)間的確定42.2.3回火加熱溫度及保溫時(shí)間的確定62.3本章小結(jié)6345鋼顯微組織分析83.1實(shí)驗(yàn)過(guò)程概述83.2金相組織結(jié)果與分析83.3本章小結(jié)12445鋼力學(xué)性能研究134.1硬度測(cè)定134.1.1布氏硬度測(cè)定134.1.2洛氏硬度測(cè)定154.2拉伸實(shí)驗(yàn)174.2.1強(qiáng)度
