ZL111铝合金压铸件硬质点缺陷分析_张晓妍

ZL111(河南工业职业技术学院机械工程系),ZL111,,,MgAl2O4AlSiMnFe;;;TG146.1+2;TG249.2A1001-2249(2009)01-0030-03DOI:10.3870/tzzz.2009.01.010:2008-05-13;:2008-11-21:,,1967,,,291(473009),:13837789658,E-mail:[e-mail]90ZL111,LJ90,,,,[1~14]1试验取样与方法1.1,ZL1111,2图1LJ90左曲轴箱体及试样取样部位示意图图2试样实物照片(经体积分数为0.5%的HF水溶液浸蚀)1.2()11()1(1)10.0mm2.5mm2(1)1.322110.0mm2.5mmOLYPUS-PMECAMEBAX-MICOHX-1002OLYPUS-PMEHX-1002试验结果与分析2.12.1.1110.5%HF,33ZL111,10.0mm2.5mm,,3a3c3d;,3a3b2.1.2220.5%HF,4ZL111(4a),Si,(3020092914b)(a)10.0mm2.5mm亮块与外围组织(b)10.0mm2.5mm亮块与外围组织(c)中心亮块组织(d)中心亮块组织图31号试样金相组织(经体积分数为0.5%的HF水溶液浸蚀)(a)浅灰色相和黑色夹杂物(b)大块黑色夹杂物图42号试样金相组织(体积分数为0.5%的HF水溶液浸蚀)2.21232.34m,43(HV)/N10.0mm2.5mm10.0mm2.5mm10.0mm2.5mm1031121190.50.51.01()()97900.51.05050.57344994801.01.51.05491.010.0mm2.5mm15mm()990.52()()4125320.50.5686121913797801.51.51.51.54%xBMgAlSiCuTiMnFeCrV10.0mm2.5mm2.2382.8212.352.170.060.040.300.000.0310.0mm2.5mm2.1672.2423.321.830.030.050.360.000.0111.4867.4111.630.910.115.5012.470.450.0413.2374.3110.531.050.140.080.640.020.000.9136.4122.890.3018.282.9718.210.030.0022.0533.6063.090.400.030.140.670.000.021.8337.1959.850.130.040.500.410.020.033分析3.11110.0mm2.5mmHV103~119,(HV90~97),MgSiCuZL111,,(HV103~119)10.0mm2.5mm,(HV480~734)MgAl2O4;(HV505)AlSiMnFe[2,4,5,7](Si16.63Mn5.50Fe12.47Cr0.45Cu0.91);(HV532~549)(Si22.89Mn2.97Fe18.21Ti18.28)[1]31ZL1113.222(HV1219~1379)[2,4,5]MgAl2O4(HV686~780)[3,5,6];(HV412)(HV532)AlSiM-nFe4硬质点形成原因及预防措施4.1AlSiMnFeFeMn,FeMn,,,AlSiMnFe,AlSiMnFeZL111Si,,[2](12.5%),,;MgAl2O4,,,,4.2(1);,;FeSiMnTi(2),(3);,,(4),5结语,()(HV90~97),,,,,,,,[1],,.[J].,2001(6):53.[2],,.[J].,2000(4):10-11.[3],,.[J].,2000(5):15-16.[4],.[J].,2007,28(12):1612-1613.[5],,.[J].,2003(3):188-190.[6],,.[J].,2000(1):4-7.[7],,.[J].,2001(1):9-10.[8].[J].,2001(1):54-55.[9],.CJ50[J].,2008,37(17):132-133.[10].[J].,1998(5):31-33.[11],,.[J].,2000(S1):4-7.[12],,.Y112[J].,2000(4):39.[13],,Y112Y113[J].,2007,28(12):1666-1667.[14].[J].,2005(2):35-36.(:)()AnVien,1503,3072009~2010,,,2012()322009291sem-isolidalloyandtopredictprocessingparameters.KeyWords:Mult-iscaleSimulation,Sem-isolidForm-ing,Near-liquidusCasting,Liquid/solidPhaseTrans-formationDesignofMonitorandControllerforDieCastingMa-chineBasedonDSPPengJishen,LiTaochang,SongLiye(DepartmentofElectricalEngineering,LiaoningTechnicalUniversity,Huludao,China)2009,29(1)0024~0027Abstract:DesignofmonitorandcontrollerfordiecastingmachinewasproposedbasedontheDSPtoim-provecontrolsystemperformanceofdiecastingma-chineandtorelieflaborintensityofworkeraswellasraisingproductqualityandefficiency.BasedonTMSS320F2812DSPcore,themonitorandcontrollerextendperipherallystoragemodule,communicationmodule,analogueinput/outputmoduleandhuman-machineinterfacetofullyutilizepowerfulcomputingcapability,whichexhibitsthedesirableavailabilityofrealtimedetectingdieprocessingparametersandrea-ltimecontrollingdiecastingprocess.KeyWords:Die-castingMachine,MonitorandContro-ller,CircuitLayout,InjectionNon-linearPressureConditioninFillingofAluminumAlloyWheelinLowPressureDieCastingChenJ-igang1,LiQiang1,2,WangGe1(1.CollegeofMechan-icalEngineering,YanshanUniversity,Qinhuangdao,China;2.HebeiUniversityofScienceandTechnolo-gy,Shijiazhuang,China)2009,29(1)0027~0029Abstract:Inprocessoflow-pressuredie-castingfillingforaluminumalloywheel,thepressureconditionisthekeyinfluentialfactorsforquality.Amethodofnon-linearpressureloadwasputforward.Basedonthesimulationoflinearpressureandnon-linearpres-sure,feasibilityofnon-linearpressurewasvalidated,andeffectsofpressureconditiononfillingprocessanddefectsindiecastingweredescribed.Steadyfillingprocesscanberealizedbyapplyingnon-linearpressuretowheelwithcomplicatedcavity.Pressure-applyingvelocitycanbeproperlyincreasedafterfront-flowfillsthecavity.Thepressureshouldbeincreasedgentlyinthefillingofwheelspokeandlowerhalf-spaceofwheelrim,whileintherisingfillingprocessofwheelrim,thepressure-applyingvelocitycanbeincreasedonceagain.Theresultsindicatethatnon-linearpres-sureconditioncangreatlyreducedefectsinfillingprocesstoimprovethequalifiedproductrateofcom-plicatedwheel.Therationalnon-linearpressurecond-itioncanberealizedbynumericalsimulationandtrialdie-castingundertheconditionofkeepingsteadyfront-flow.KeyWords:AluminumAlloyWheel,NumericalSimu-lation,LowPressureDieCastingFilling,Non-linearPressure-applying,PressureConditionHardSpotsinDieCastingZL111AluminumAlloyPartsZhangXiaoyan,YuXingzhi(DepartmentofMechan-icalEngineering,HenanPolytechnicInstitute,Nan-yang,China)2009,29(1)0030~0032Abstract:HardspotsindiecastingZL111aluminumalloycrankcasewereobservedbyOM(opticalmicro-scope),electronicproberandmicro-hardnesstester,andsoon.Theresultsrevealthatserioussegregationandexceeding-standardofchemicalcompositioninthecrankcasecanbeexamined.Thereexistsheterogene-ousdistributionofwhiteblockandgrayinclusionaswellaslow-graycompoundhardspotsinthemicro-structure,whichcorespondingtoquenchinglowhard-nessspotsentrappedbyturbulentflowinjection,unsmeltedSiphaseandspinel,MgAl2O4,AlSiMnFephaseaswellascompoundhardspotofintermetalliccompound,respectively.KeyWords:AluminumAlloy,