鑄造AlSi7Cu2Mg合金成分優(yōu)化及組織、性能研究.pdf

1、中北大學碩士學位論文鑄造AlSi7Cu2Mg合金成分優(yōu)化及組織、性能研究姓名：黃正軍申請學位級別：碩士專業(yè)：材料加工工程指導教師：黨驚知20090623中北大學學位論文TheoptimizationofconstituentofcastingAISi7Cu2Mgalloyingandstudiesonorganization，performanceAbstractCastingaluminum—siliconalloyisthemost

2、widelyusedaluminumalloyduetoitsgoodcastingpropertyA1Si7Cu2MgalloyisoneofthewidelyusedalloysinindustrysinceithasnotonlygoodcastingcharacteristicsbutalsogoodairsealpropertyAsthemechanicalpropertiesofcommonAISi7Cu2Mgalloyes

3、peciallytheductilityisrelativelyworseandcannotmeettheneedofuseofsomeimportantparts，theapplicationofcommonA1Si7Cu2MgalloyislimitedSoithasbeenapropositionofmaterialresearchersthathowtoimprovethemechanicalpropertiesofcommon

4、A1Si7Cu2MgalloyTheproblemhaspassedtheorthogonaltext，hasascertainedtheoptimumdegenerationhandicrafttothealloycastingA1Si7Cu2Mg，TheSrputtinginmeasuresO04％，purchasetimequietly60mins，addthetimealuminiumliquidtemperature750℃；

5、whenSrisaddedamountswithinO02％～O04％rangeincreasingbythateutecticsiliconformmeasureswiththeSrputtinginbutmoreandmoretrivialThispaperstartsfromthetheoryofimprovingthestrengthandtoughnessofaluminumalloyAnewkindofcastingalum

6、inum，siliconandcopperalloywasobtainedandthemechanicalpropertiesofthealloyaremuchbetterthanthecommonA1Si7Cu2MgalloybyaddingandchangingalloyingelementsandoptimizingexperimentmethodTheadditionamountofZr、Cd、CuandMgmodificati

7、onwereoptimizedbyorthogonaltestT6heattreatmentprocesseswerealsotakenintoaccountTheeffectofalloyelementsonthemechanicalpropertiesofthealloywasinvestigatedandtheoptimalprocessparameterswereobtainedbyresultsoforthogonaltest