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1、齒輪用鋼的熱處理工藝設(shè)計摘要熱處理工藝是金屬材料工程的重要組成部分。通過熱處理可以改變材料的加工工藝性能，充分發(fā)揮材料的潛力，提高工件的使用壽命。熱處理不僅對鍛造機(jī)械加工的順利進(jìn)行和保證加工效果起著重要作用，而且在改善或消除加工后缺陷，提高工件的使用壽命等方面起著重要作用。該課題是根據(jù)齒輪使用條件和性能要求，選擇不同的材料，進(jìn)行相應(yīng)的熱處理工藝設(shè)計，包括加熱溫度、保溫時間、冷卻方式和冷卻介質(zhì)等。并通過退火、調(diào)質(zhì)、滲碳、等熱處理，分析組織和性能的變化，在實(shí)驗(yàn)基礎(chǔ)上，驗(yàn)證所設(shè)計熱處理工藝的正確性。最終得到的結(jié)論是，分別選擇45鋼和Q23
2、5鋼作為齒輪材料，45鋼采用退火和調(diào)質(zhì)處理，Q235鋼采用退火、滲碳、淬火和低溫回火處理。實(shí)踐證明要想獲得理想的組織與性能，保證零件在生產(chǎn)過程中的質(zhì)量穩(wěn)定性和使用壽命，就必須從工件的特點(diǎn)﹑要求和技術(shù)條件，認(rèn)真分析產(chǎn)品在使用過程中的受力狀況和可能失效形式，正確選擇材料；再根據(jù)生產(chǎn)規(guī)模﹑現(xiàn)場條件﹑熱處理設(shè)備提出幾種可行的熱處理方案，最后根據(jù)其經(jīng)濟(jì)性﹑方便性﹑質(zhì)量穩(wěn)定性和便于管理﹑降低成本等因素，確定出一種最佳方案。關(guān)鍵詞：退火；調(diào)質(zhì)；滲碳；組織；性能HeatTreatmentProcessDesignofSteelUsedforgear
3、AbstractTheheattreatmentprocessisanimportantpartofthemetalmaterialsengineering.Processingperformanceofthematerialcanbechangedbyheattreatment,givefullplaytothepotentialofmaterialstoimprovethelifeoftheworkpiece.Theheattreatmentnotonlyfortheprocessingofforgingmachineryisc
4、arriedoutsmoothlyandtoensurethatprocessingeffectsplayanimportantrole,andplaysanimportantroleintheimprovementoreliminationofprocessingdefectsandimprovethelifeoftheworkpiece.Inthissubject,Ichosedifferentmaterialsaccordingtothegearconditionsofuseandperformancerequirements
5、,andcarriedonthecorrespondingheattreatmentprocessdesign,includingtheheatingtemperature,holdingtime,coolingmodeandcoolingmedium,etc.Andthroughtheannealing,coating,suchascarburizing,heattreatment,theanalysisorganizationandthechangeoftheperformance,onthebasisofexperiment,
6、verifythecorrectnessofdesignbyheattreatmentprocess.Thefinalconclusionisthat,selectthe45steelandQ235steelasagearmaterial,45steelbyannealingandquenchingandtemperingtreatment,Q235steelbyannealing,carburizing,quenchingandlowtempering.Practicehasprovedthatinordertoobtainthe
7、desiredmicrostructureandproperties,toensurethequalitystabilityandservicelifeofpartsintheproductionprocess,fromthecharacteristicsoftheworkpiece,requirementsandtechnicalconditions,acarefulanalysisoftheforcestatusoftheproductduringuseandmayfailuremodes,thecorrectchoiceofm
8、aterials;severalpossibleheattreatmentprogramaccordingtothescaleofproduction,siteconditions,theheattreatmentequipment,
