硅含量对高硅铝合金材料组织及性能的影响

9820052192(,410083),,A13051AI4051,TR2:,;,Si;;AlSiEffectof51ContentonMicrostruetureandProPertyofHighSiliconAluminumAlloyYANGFuliangGANWeipingCHENZhaoke(SehoolofMaterialSeieneeandEngineering,CentralSouthUniversity,Changsha410083)AbstraetIighthighsllieonaluminumalloy15usedforeleetroniepaekagingintheaviationandspaeeflight,hereweeallithypereuteetiehighsilieonaluminumalloy.AI3051andAI4051eanbefabrieatedwithamethodinwhiehairatomization15followedbyvaeuumeanninghotextrusionproeess.OptiealmieroseoPy,universalmaterialtestingmaehine,thermalanalyzerandTR2thermalphysiesrestingareusedtostudythemierostrueture,materialthermaleonduetivity,thermalexpansioneoeffieientandtensilestrength.Experimentalresultsshowthat,when51eontentinalloy15inerease,thesizeofsilieonerystal15largerafterhotextrusion,materialthermaleonduetivity15down,thermalexpansioneoeffieientandthetensilestrength15lowerKeywordsrapidsolidifieation,vaeuumeanning,hotextrusion,AI51alloy,gassealed,thermaleondue-tIvztyWCu1/6,,,,Al,,,,,,,,,Si,,()[2,3:,Si30%,AlSicuMg,si/Si30%40%,1~~~~1.1AISi,,200mm,,AlSi,,,,110.6IPa10000C3.smm30%40%2(2),,(MKPT3151):,2962,,Tel:[phone]Email:yangflesu@163com/99,2200,22[l,s,Maxwell[,(Maxwell):+2+ZV(;)},lLviJ(1)()51AI11m266036.4475(75:V,;,Maxwell2Si(550)2\705040ƒ\„n„Ž1.22,,70%,,4,3700C430OC4900C5500C,lh3O0t,250,,,16(4ommlomm),9001.3JR2;;\,a22dI\\__\eva,ue\30405060Composition(Si%)222137C1,,:,,,AISi,,,,,,,,,,,,,,,,,,,2,,,,:,,,,,,,,3,,.,;,,,3AI4051(X500)AI3051bAI40511t370oC2.2J,,,,,,;,,,,,,.100-20052192,2,,:,,,,:,;;;,2.323.610/,(2.87.2)xl6/,,,()Tner[7lV,K,+VKV,K+VK(2):avK;avK\TurnrModelll_Measurevalueee,~4:,,2.43,,A4A3051:cc(1)(3):a;fd(3),,,,,,:¹,,,,,,;,,,,,,,º,,,3„O(MPa)370OC4300C490oC550OC23919622918821617420616544,,,,,,,,,,,,,,,3,,,,,,,,A1Si,(25%),,,,,25%,,,,25%,,,AISi3(1),,(2),,,Maxwell(3),(105).100-20052192,2,,:,,,,:,;;;,2.323.610/,(2.87.2)xl6/,,,()Tner[7lV,K,+VKV,K+VK(2):avK;avK\TurnrModelll_Measurevalueee,~4:,,2.43,,A4A3051:cc(1)(3):a;fd(3),,,,,,:¹,,,,,,;,,,,,,,º,,,3„O(MPa)370OC4300C490oC550OC23919622918821617420616544,,,,,,,,,,,,,,,3,,,,,,,,A1Si,(25%),,,,,25%,,,,25%,,,AISi3(1),,(2),,,Maxwell(3),(105)