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(,321307):论述了ZL108和YL113合金中的(FeMn)3Si2Al15球状多面体形态及偏析铁在铸造铝合金中通常以针状化合物的形态出现在金相组织中,使合金力学性能恶化,加适当比例的锰可以中和铁的有害作用,使之改变成为汉字状鱼骨状花卉状和球状多面体形态但(FeMn)3Si2Al15球状多面体,因硬度高,给机械加工带来困难,应使之尽可能均匀分布且数量要少当铁锰含量偏高时,可采用简单的工艺方法将铁锰含量降至适当的水平,使(FeMn)3Si2Al15相尽可能少:铁相;球状多面体;偏析:TG146.2:A:1001-4012(2003)04-0180-04THEIRONPHASEEXISTEDINA-lSiCASTINGALUMINUMALLOYSCAIXu-qin(FromXingyueGroupCoLTD.,Zhejinag321307,China)Abstract:Theironexistedincastingaluminumalloysusuallyappearsinthemicrostructurebytheshapeofneedle-like,whichdeteroratesthealloysmechanicalproperties.Toaddaproprietyratioofmanganesewillneutralizetheharmfuleffectoftheiron,changeittotheshapeofchinesecharacters,fishbone,flowerandglobatepolyhedron.Weherewithdis-sertatetheconfigurationof(FeMn)3Si2Al15,theglobatepolyhedron,whichisinthealloysofZl108andYL113,andmakeoutthesegregationwethinkthatthecompoundhasahighhardness,andbringsmoredifficultytomachinefinish-ing,andsoforthweshoulddistributeitaswel-lproportionedaspossibleandlessenthequantity.Therefore,whenthecontentofironandmanganeseisonthehighside,wemayadoptsomesimpletechnologicmethodtodecreasethecontentoftheFe-Mntoareasonableamount,makethe(FeMn)3Si2Al15phaseaslessaspossible.Keywords:Ironphase;Globatepolyhedron;Segregation1,,0.2%~1.0%,,FeAl3,Fe2Si2Al9T2,,,;,,,:2002-10-17:(1933-),,,,,,GB/T1173-1995,(FeMn)3SiAl12Fe3SiAl12T1,,ZL108(GB/T1173-1995)YL113(GB/T15115-1994)(JIS42212ADC12)18039420034-PTCA(PARTA:PHYSICALTESTING)Vol.39No.4Apr.20032ZL108YL113(ADC12),ZL108YL113,0.6%~0.8%,,,,,,1,()1YL11325020%Fig.1MicrostructureofYL113thin-walldie-castingEtchedwith20%sulphuric-acidaqueoussolution2,ZL108,,3,4,3,,,,,,,,1g+100ml20%,(a)(b)(c)225020%Fig.2GrowthinghistoryofcrystalofglobatepolyhedronironphaseEtchedwith20%sulphuric-acidaqueoussolution(4),(12c);(6530~40s),,,181:3ZL108()100Fig.3MicrostructureofZL108segregation,notetched427020%Fig.4TypicalphotographofshapeEtchedwith20%suphuric-acidaqueoussolution,[1]A-lS-iMn-Fe,(FeMn)Al6,FeAl3,Fe2SiAl8FeSiAl5(FeMn)3Si2Al15,0.8%,[2](),(FeMn)3SiAl12,()[3],,X,,,[1],,(FeMn)3Si2Al15(FeMn)3SiAl123[3]ZL108(FeMn)3Si2Al15,YL113(ADC12),20t,,,1,51()Tab.1Chemicalcompositionanalysisresultsofdifferentpositionofingotalumimum(percentageinmass)%SiFeCuMnMgCrNiZn10.640.6752.250.2160.1560.01170.1270.46610.551.192.210.5530.1540.03590.1300.44210.890.842.340.2920.1650.01660.1320.4625Fig.5Schematicdiagramofthepositionofingotalumimumforspectrographicanalysis,(FeMn)3Si2Al15(6),(7),,,,[1,3],(FeMn)3Si2Al15649564,650,4m,,182:6,()100Fig.6Onthemiddle-positionofingotAl,theglobatepolyhendromironphaseswereconcentratedandbright,notetched7,()100Fig.7Onthelower-positionofingotAl,therearelessglobatepolyhendromironphasesrelitively,theinitialsiliconshownbyarrowinthispicture,notetched(FeMn)3Si2Al15,,,(FeMn)3Si2Al15,(),,(FeMn)3Si2Al15,650,,,678,,,2,(),2()Tab.2ChemicalcompositionofdifferentpositionofingotAlumimumafterre-melting(percentageinmass)%SiFeCuMnMgCrNiZn10.550.6852.210.2850.08900.01280.08530.42310.660.7382.200.3220.08220.01500.08240.41910.620.7312.080.3300.07610.01440.07540.408,(FeMn)3Si2Al15,[2],(FeMn)3Si2Al15873.5HV0.05[3],wFe0.4%,,,,,(FeMn)3Si2Al15,,:110%,0.45%,,10%0.9%,,(FeMn)3Si2Al15,,YL113(ADC12),1994ADC12GB/T15115,YL113,wMn0.5%,,0.1%~0.25%,,,,,4(1),ZL108YL113(FeMn)3Si2Al15(2)(FeMn)3Si2Al15649(下转第224页)183:u4,rel(FeL)=u4(FeL)|FeL|=0.02588.04=0.028%;=n-1=5Fm,4-3:Fm=1mmj=1Fm,j=99.06(kN)Sp,Fm=1mmj=1S2Fm,j=0.000512034=0.0226(kN)p,Fm=m(n-1)=10(5-1)=40SF,j(SFm)=0.00429(kN)(SFm=0.02226kN)(SFm)=0.00429(SFm)=Sp,Fm2(n-1)=0.02262(5-1)=0.00799,Sp,Fm,Fm,(1-9)u4(Fm)=Sp,Fm/k,k=1u4(Fm)=Sp,Fm=0.0226=0.023(kN)u4,rel(Fm)=u4(Fm)|Fm|=0.02399.06=0.02310-2(5)u(FeL)u(Fm),,(2-11)urel(FeL)=A+B+C+DA=u21,rel(FeL)=(0.5810-2)2B=u22,rel(FeL)=(0.1510-2)2C=u23,rel(FeL)=(0.02310-2)2D=u24,rel(FeL)=(0.02810-2)2ureL(FeL)=0.36021310-4=0.6010-2u(FeL)=|FeL|urel(FeL)=88.040.60%=0.52824(kN)=528.24(N)ureL(Fm)=A+B+C+DA=u21,rel(Fm)=(0.5810-2)2B=u22,rel(Fm)=(0.1510-2)2C=u23,rel(Fm)=(0.02310-2)2D=u24,rel(Fm)=(0.02310-2)2urel(Fm)=0.35995810-4=0.6010-2u(Fm)=|Fm|urel(Fm)=99.060.60%=0.59436(kN)=594.36(N)(待续)(上接第174页)[6]EzeraY,SozinovA,KimmelG.MagneticShapeMemo-ry(MSM)EffectinTexturedPolycrystallineNi2MnGa[J].ProcSPIE-TheInternationalSocietyforOpticalEn-gineering,1999,3675:244-251.[7]ZhaoYB,etal.EffectofMagneticHeatTreatmentontheMagnetically-inducedStraininaPolycrystallineNi2MnGaalloy[J].MaterSciForum,2001,394-395:557-560.[8],.CoMn[J].,2001,35(5):647-650.[9]WedelB,etal.LowtemperatureCrystalStructureofN-iMn-Gaalloys[J].JAlloysCompd,1999,290(1-2):137-143.(上接第183页),(3)(FeMn)3Si2Al15,,,:[1]MondolfoLF.AlumimumAlloysStructureandProper-ties[M].London:Butterworths,1976.[2].[M].:,1980.121-122.[3].ZL108[J].,1982,(4):32-38.224: