搜文檔
認(rèn)證信息
認(rèn)證類型:個人認(rèn)證
認(rèn)證主體:常**(實(shí)名認(rèn)證)
IP屬地:河北
下載本文檔
版權(quán)說明:本文檔由用戶提供并上傳,收益歸屬內(nèi)容提供方,若內(nèi)容存在侵權(quán),請進(jìn)行舉報(bào)或認(rèn)領(lǐng)
1、西北工業(yè)大學(xué)碩士學(xué)位論文熔體溫度處理對ZL114A合金組織及其性能的影響姓名:楊志懷申請學(xué)位級別:碩士專業(yè):凝聚態(tài)物理學(xué)指導(dǎo)教師:張蓉20070301西北T業(yè)大學(xué)碩士學(xué)位論文ABSTRACTABSTRACTZLl14Aisonekindofimportantcastingalloywidespreadapplicationinaerospaceaswell船consumerindustrydomainInordertoobtainthe
2、fineperformance,deteriorationprocessingwasusedThetreatmentmethodsarecomplexandthequalityisunstableInrecentyears,themeltprocessingtreatmenthasobtainedwidespreadattentionButtheresearchabouttherelationshipamongmeltstructure
3、,solidificationorganizationandthemechanicscapabilitywasonlyalittleByusingtheDifferentScanningCalorimetric(DSC)results,thisthesisstudiedtheeffectsofmeltstructureandmelttemperatureprocessingonZLI14Aalloycoagulationorganiza
4、tionandmechanicsperformanceHasobtainedthefindings嬲following:1TheDSCresultsindicatethatabovetheliquidustemperaturetheZLl14AalloymeltsstructurechangesalongwiththeincreaseoftemperatureInfluencedbydynamicsfactors,themeltstru
5、cturetransformationCan’treversecompletely2n圮coolingspeedisoneofcrucialfactorswhicheffectthecoagulationorganizationAlongwimtheincreasingofcoolingspeedthesecondarydendritearmdistanceX2aAlreduceslightlyandtheprimarygraincoa
6、rsensHi曲coolingspeedhassuppressedtheternaryorquadrinomialeutecticreactionMicrohardnessanalysisindicatestheincreasetendencyofcoagulationintestspecimen3Thehigherofmelttemperatureandthemoreeasilytoeliminatetheshapeofheterog
7、enonscoreAccompanyingtheincreasesupercoolingdegree,itisadvantageousinorganization’SrefinementAtthesametime,thetemperaturedecreasespeedinTs—TosectionhasimportantinfluenceoncoagulateorganizationTheincreaseofTsTosectioncool
8、ingrateisadvantageousinobtainsthetinyevenmicrostrueture4ThroughthemelthotfastprocessingcrafttheZLl14Aalloytensilestrengththerelativeelongationratioandthemicrohardnessincreaseafterthehotfastprocessingcraftcomparedtotheraw
9、material,itstoughnessallbigsurpassestheT6processingPassesthroughinparticular820“CthehotfastprocessingtestspecimentherelativeelongationratioisT6processingtestspecimen78times,itstensilestrengthandthemiemhardnessapproachedi
0/150
提交評論
聯(lián)系客服
本站為文檔C2C交易模式,即用戶上傳的文檔直接被用戶下載,本站只是中間服務(wù)平臺,本站所有文檔下載所得的收益歸上傳人(含作者)所有。眾賞文庫僅提供信息存儲空間,僅對用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理,對上載內(nèi)容本身不做任何修改或編輯。若文檔所含內(nèi)容侵犯了您的版權(quán)或隱私,請立即通知眾賞文庫,我們立即給予刪除!
Copyright ? 2013-2023 眾賞文庫版權(quán)所有 違法與不良信息舉報(bào)電話:15067167862
復(fù)制分享文檔地址
http://www.omd.org.cn/shtml/view-2931639.html
復(fù)制
下載本文檔
評論
0/150
提交評論