原位自生Mg-,2-Si-AM60復合材料性能及流變成形的研究.pdf

1、南昌大學碩士學位論文原位自生MgSiAM60復合材料性能及流變成形的研究姓名：吳孝泉申請學位級別：碩士專業(yè)：材料加工工程指導教師：閆洪20100610ABSTRACTABSTRACTM孵1esiumm耐xcompositescanefrectiVelyimpr0VeitsperfornlaIlce，itbecometlleresearchhotspotathoIne觚dabroadAtpresent，tlleresearchfocuse

2、onparticlereiⅢorcedwKchtheprocessingofm砒odsomewhatcomplicatedarldpoor廿le曲al渤bili吼B(yǎng)ecauseofsiInpleprocess，eXcellent伊aillbouIldaD，combinationaI】ldotheradv鋤tages，memetllodofinsitutopreparecompositesbec鋤etllemainob!jectof咖dy

3、IIladditioIl，die—caSt堍isthernainofMagnesi眥alloyf0咖ingprocess，恤conventionalM曲pressurediecaSting(HPDC)defectsinmulticaV塒t)rpe，eaSytovolumegaS，nonheat—treatedCompared謝tllthoseproducedbyHPDC鋤d觚yotllerSSMprocessingtechIliques

4、，Ⅱ1erheo—diecasting(I①C)processh嬲beengreatdeVelopedfornea卜netsh印ecomponentsT11isp印ermajmyinclude：AddedtheSipowder缸oAM60，M92Si／AM60composites、糯preparedbymecll￡micalStirringin—situDifferentcontentsofSipowdera丘’ectonmateria

5、lsa11dmeckmicalpropertiesofM＆Si／AM60compositeswerestudied，鋤didentified廿1eoptimaldosageofSiTheM92Si／』氣M60compositess仃en舀hellingmechaIlismh鶴beenmldied111econcludeshowthatClline∞ch黜lcterstypeM＆SidistributediIlt11emicro咖tIlr

6、e、析tlltlleSicontentincrease，thehardnessofcoInpositeswaSilIlproVed，s吮ngm謝11reachapeak粕dthendecreausequicldy，plaStici夠continuedtodeclineBystudyiIlgtheM＆Si／AM60compositeswithdi虢rentpar鋤eters(10ad，Sim鵲sfaction，slidingSpeed)o

7、nme銜ction鋤dwearperfo咖a11cefoulldthatwitlltheillcreaSeofSicontent，M92Si／AM60銜ctionaIldwearpropertieswasreinforcedWithincreaseofSicontents，thewearm嬲sofM92Si／AM60compositescontinuedtodecreaSeM＆Si／AM60compositescanpostponetl

8、le秭Valof砌ectionpointUndertheconditionsoftheVariouSpar鋤eters，gotain—deptllstudyontlleprocessofwearmechanismSemiSolidsluITyofM92Si／AM60compositeswaSpreparedbymechaIlicalstirringaIlds_tudieddi丘erentp踟eterS(shearrate，shearti