激光功率对2A12铝合金淬火组织的影响

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1,266041;294362,266111):CO2,2A12,,2A122A12,,,,,,,,9%:;;;;:TG14612:A:16713133(2009)080081-03Effectoflaserpoweronquenchingstructureof2A12SUNFu2juan1,GAOFeng1,WangBin1,WangYong2jie2,WangBing1(1QingdaoBranch,NavalAeronauticalEngineeringAcademy,Qingdao266041,Shandong,CHN;2The94362Army,Qingdao266111,Shandong,CHN)Abstract:ThroughcontroltechnologicalparameterofCO2lasergenerator,2A12wasquenchedbylaserandafterquenching,mi2crostructureandmicro2hardnesswereanalysed.Theresultshowedthatpoweraffectedthemicrostructureapparently.2A12isthemostsensitivealuminumalloystotemperature,soundertheconditionofdefinitivescanningvelocity,protectiongasflowandoverlargepower,thestructurewasburnt.Thegrainboundarywaswidthandtheeutecticliquidglobewasappeared.Afterquenching,thegrainsareobviouslyfinedandthemicro2hardnessimprovedby45%contrasttosubstrate.Themicro2hardnessofthenormalquenchingsurfacewasharderthantheburntpsby9%.Keywords:aluminumalloys;laserquenching;microstructure;micro2hardness;burnt0,,,,,,,,[125]2A12,,,,,,11112A12,,+40mm30mm,4mm,;,;,112CO2,1016m,2kW,18©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:1/W/(mms-1)/(Lmin-1)150025102600251037002510500W600W700W,20mm/s,10L/min,15,145,2,,2A1211a1b1c500W600W700W1a,,,,,,1b1a,,11c,,(+Al2Cu+Al2CuMg),,,,,,,,(1c)1,,,Al2Cu()Al2CuMg(S),,,:Al7Cu2FeAl6MnFeSiAl6MnFeAl3Fe3HXS21000,300g,20s,,20125mm,,323,,,,,500W600W700W,16512HV15716HV15116HV,500W,700W9%,(114HV)45%(93)28©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[7],.[J].,2004,41(7):1194-1199.[8]KennedyJ,EberhartR.Particleswarmoptimization[C].ProceedingsofIEEEInternationalConferenceonNeuralNetworks,1995:1942-1948.[9]EberhartR,KennedyJ.Anewoptimizerusingparticleswarmtheory[C].Proceedingsofthe6thInternationalSymposiumonMicroMachineandHumanScience,1995:39-43.[10],,,.[J].,2007(1).[11]LUSSR,JAAKOLATHI.Optimizationbydirectsearchandsystematicreductionofthesizeofthesearchregion[J].AIChEJournal,1973,19(4):760-766.:,,,,,,,,,1996-1999CornellRochester,CTCAD/CAM,35,2E2mail:[e-mail]:2009201230(82)3500W,700W,,,,41)25mm/s10L/min,500W,,700W,2),,3)500W700W9%,45%,Al2Cu()Al2CuMg(S):[1],,.LY12CZ[J].,2007,23(4):401-404.[2],,.[J].,2003(1):5-8.[3],.[J].,2004,28(1):182-184.[4],,.TC4[J].,2007(8):74-76.[5],,,.[J].,2004,20(6):30-33.:,,,E2mail:[e-mail]:200920122439