ZL107鑄造鋁合金的微量合金強韌化.pdf

1、重慶大學碩士學位論文ZL107鑄造鋁合金的微量合金強韌化姓名：唐春申請學位級別：碩士專業(yè)：材料工程指導教師：李華基王東輝20041013重慶大學工程碩士學位論文目錄ABSTRACTAsproductiondesignpaymoreattentiontolighteningrequirements，theusagequantityofaluminiumalloyhasbeengrowingincastingindustryNowinord

2、erteducefuelconsumptionandimprovepowerutilizationrate，ithasbecomealongtrendofdevelopmenttousealuminiurrdmagnesiumalloycastingpartsinsteadofsteelandironcastingpartsinautomotiveindustryCastaluminiumsiliconalloyisthemostwid

3、elyusedaluminiumalloywitllmostusagequantityduetoitsgoodcastperformanceThealloyofZLl07isoneofthewidelyindustryusedalloysespeciallyinautomotiveindustrybecauseithasnotonlygoodcastperformance，butalsogoodairsealperformanceand

4、relativelybettercomprehensiveperformanceButthemechanicalperformanceandcorrosionresistanceofZLl07isrelativelyworse，andmachinabilityispoorandCan’tmeettherequirementofsomepanswithrelativelyhighperformancerequirements，itsUSe

5、extentisundoubtedlylimitedSoithasbeenapropositionbeforecastingpractitionerhowtoimprovethecomprehensiveperformanceandextenditsapplicationextentwhilekeepisfinecastperformance111ispropositionstartsfromthetheoryofimprovement

6、ofaluminiumalloystrengthandtoughnessandobtainsanewkindofcastalloyofaluminium，siliconandcopperwhosecomprehensiveperformancesarebetterthanZLl07，byoptimizingcompositionthroughaddingalloyelementsbasedonthecompositionofZLl07，

7、andbypurllying，finecrystallizationandtransformationtreatmentduringthealloymeltingprocesstoprocurehighqualityalloyfusion，anduseorthogonaltestmethodtocarryoutaseriesofexperimentstofinallydeterminethebestcompositionproporti

8、on，performverificationbygravitycastingWhengravitymoldedwithmetaldie，thisnewkindofhigh—performancecastalloyofaluminium，siliconandcoppercanachievetheas—castmechanicalperformancesto：tensilestrengthob=2234MPa，elongationrate5

9、5=294％，BrinellHardnessHBS一799％，incomparisonwithZLl07，276％ob，278％55，119％HBShavebeenimprovedToverifyitspracticalityweperformedproductiontestforthisnewtypecastaluminiumalloyTheresultofproductiontestshowsthatthiscastaluminiu