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1、南京交通職業(yè)技術(shù)學(xué)院模具熱處理技術(shù)的現(xiàn)狀與展望26南京交通職業(yè)技術(shù)學(xué)院摘要:模具熱處理是保證模具性能的重要工藝過程。它對(duì)模具的如下性能有著直接的影響。模具制造精度:組織轉(zhuǎn)變不均勻、不徹底及熱處理形成的殘余應(yīng)力過大造成模具在熱處理后的加工、裝配和模具使用過程中的變形,從而降低模具的精度,甚至報(bào)廢。模具的強(qiáng)度:熱處理工藝制定不當(dāng)、熱處理操作不規(guī)范或熱處理設(shè)備狀態(tài)不完好,造成被處理模具強(qiáng)度(硬度)達(dá)不到設(shè)計(jì)要求。模具的工作壽命:熱處理造成的組織結(jié)構(gòu)不合理、晶粒度超標(biāo)等,導(dǎo)致主要性能如模具的韌性、冷熱疲勞性能、抗磨損性能等下降,影響模具的工作壽命。模具的制造成本:作為模
2、具制造過程的中間環(huán)節(jié)或最終工序,熱處理造成的開裂、變形超差及性能超差,大多數(shù)情況下會(huì)使模具報(bào)廢,即使通過修補(bǔ)仍可繼續(xù)使用,也會(huì)增加工時(shí),延長交貨期,提高模具的制造成本。正是熱處理技術(shù)與模具質(zhì)量有十分密切的關(guān)聯(lián)性,使得這二種技術(shù)在現(xiàn)代化的進(jìn)程中,相互促進(jìn),共同提高。20世紀(jì)80年代以來,國際模具熱處理技術(shù)發(fā)展較快的領(lǐng)域是真空熱處理技術(shù)、模具的表面強(qiáng)化技術(shù)和模具材料的預(yù)硬化技術(shù)。關(guān)鍵詞:模具熱處理;模具鋼;真空淬火;強(qiáng)化;26南京交通職業(yè)技術(shù)學(xué)院StatusandProspectofthemoldheattreatmenttechnologyAbstract:mol
3、dheattreatmentisanimportantprocesstoensurethatthemoldperformance.ItfollowsthemoldperformancehasadirectConnected.Precisionmoldmanufacturing:organizationalchangesuneven,incomplete,andtheformationofheattreatmentresidualstresscausedbythedeformationofthemoldaftertheheattreatmentprocessing
4、,assemblyandmoldduringuse,therebyreducingtheaccuracyofthemold,orevenscrapped.Thestrengthofthemold:heattreatmentprocessdevelopedimproperheattreatmentoperationsarenotstandardizedorheattreatmentequipmentstatusisnotintact,causingthehandlemoldstrength(hardness)ofthedesignrequirements.Thew
5、orkinglifeofthemold:theheatcausedbytheirrationalstructure,grainsize,suchasexcessive,resultinginmajorperformance,suchasmoldtoughness,thermalfatigueperformance,anti-wearperformancedecline,affecttheworkinglifeofthemold.Moldmanufacturingcosts:asanintermediateorfinalprocessofmoldmanufactu
6、ringprocess,heattreatmentcracking,distortion-toleranceandperformanceultra-poor,inmostcaseswilldiescrap,eveniftherepaircancontinuetouse,willincreasetheworkinghourstoextendthedeliverytime,improvemoldmanufacturingcosts.Istheheattreatmenttechnologyandthequalityofthemoldhasaveryclosecorre
7、lation,makingthetwokindsoftechnologyintheprocessofmodernization,mutualpromotionandcommon.Sincethe1980s,thefast-growingareaofinternationalmoldheattreatmenttechnologyofvacuumheattreatmenttechnology,themoldsurfacestrengtheningtechnologyandpre-hardenedmoldmaterial.26南京交通職業(yè)技術(shù)學(xué)院Keywords:mo
8、ldheattreatm