Al-30Cu-3P中间合金组织及其对Al-20Si合金的变质效果
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摘要
采用熔体混合法制备Al-30Cu-3P中间合金,研究了熔体混合情况下制备的Al-30Cu-3P中间合金凝固组织的演变及其对Al-20Si合金的变质效果。结果表明,Al-30Cu-3P中间合金组织由初生α-Al+(α-Al+CuAl2)共晶+AlP组成。随着熔体搅拌时间延长,Al-30Cu-3P合金的组织中,初生α-Al相数量逐渐减少,AlP数量逐渐增多,尺寸逐渐增大。熔体搅拌时间为20 min时制备的Al-30Cu-3P中间合金中形成的AlP尺寸最小,将其加入到Al-20Si合金中进行变质,初生Si的尺寸由61.36μm细化到20.24μm。
Al-30Cu-3P master alloy was prepared by melt mixing method.The evolution of the solidification microstructure in Al-30Cu-3P master alloy and its modification effect on Al-20 Si alloy were expounded.The results indicate that the solidification microstructures in Al-30Cu-3P master alloy is composed of primaryα-Al phase,eutectic(α-Al+CuAl_2)and AlP.With increasing in stirring time,the number of primaryα-Al phases in the Al-30Cu-3P master alloy is reduced gradually,while the quantity of AlP is increased gradually with coarseness of size.The AlP presents the smallest size in the Al-30Cu-3P master alloy prepared by the melt stirring time for 20 min.The size of the primary silicon in Al-20 Si alloy is refined from 61.36μm to 20.24μm with the Al-30Cu-3P master alloy modification.
Al-30Cu-3P master alloy was prepared by melt mixing method.The evolution of the solidification microstructure in Al-30Cu-3P master alloy and its modification effect on Al-20 Si alloy were expounded.The results indicate that the solidification microstructures in Al-30Cu-3P master alloy is composed of primaryα-Al phase,eutectic(α-Al+CuAl_2)and AlP.With increasing in stirring time,the number of primaryα-Al phases in the Al-30Cu-3P master alloy is reduced gradually,while the quantity of AlP is increased gradually with coarseness of size.The AlP presents the smallest size in the Al-30Cu-3P master alloy prepared by the melt stirring time for 20 min.The size of the primary silicon in Al-20 Si alloy is refined from 61.36μm to 20.24μm with the Al-30Cu-3P master alloy modification.
引文
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[2] LUDWIG T H,SCHAFFER P L,ARNBERG L.Influence of phosphorus on the nucleation of eutectic silicon in Al-Si alloys[J].Metallurgical&Materials Transactions,2013,A44(13):5 796-5 805.
[3] DANG B,JIAN Z Y,XU J F,et al.Effect of phosphorus and heat treatment on microstructure of Al-25Si alloy[J].China Foundry,2017,14(1):10-15.
[4] LUDWIG T H,DAEHLENE S,SCHAFFER P L,et al.The effect of Ca and P interaction on the Al-Si eutectic in a hypoeutectic Al-Si alloy[J].Journal of Alloys and Compounds,2014,586(15):180-190.
[5] GHOMASHCHI R.Factors influencing the modification and refinement of hypereutectic Al-Si alloys for production of automotive pistons[J].TMS Light Metals,2004:851-856.
[6] WANGQ L,GENG H R,ZUO M,et al.Effects of melt thermal rate treatment and modification of P and RE on hypereutectic Al-SiCu-Mg alloy[J].Materials Science and Technology,2013,29(10):1 233-1 240.
[7] WANGA Q,ZHANG L J,XIE J P.Effects of cerium and phosphorus on microstructures and properties of hypereutectic Al-21%Si alloy[J].Journal of Rare Earths,2013,31(5):522-525.
[8] YEGANEHAS E V,RAZAGHIANA A,EMAMY M.The influence of Cu-15Pmaster alloy on the microstructure and tensile properties of Al-25wt%Mg2Si composite before and after hot extrusion[J].Materials Science and Engineering,2013,A566:1-7.
[9] ZHONG G,WU Z B,QIU C,et al.Study on absorption rate of phosphorus for hypereutectic Al-Si alloy modified with Cu-P[J].Materials Science Forum,794-796:112-117.
[10] NOGITA K,MCDONALD S D,TSUJIMOTO K,et al.Aluminium phosphide as a eutectic grain nucleus in hypoeutectic Al-Si alloys[J].Journal of Electron Microscopy,2004,53(4):361-369.
[11]朱向镇,刘相法.几种含P中间合金对过共晶Al-Si活塞合金变质效果的比较[A].全国铝及镁合金熔铸技术交流会[C].杭州,2011.
[12] ZUO M,LIU X F.Refinement of hypereutectic Al-Si alloy by a new Al-Sc-P master alloy[J].J.Inorg.Organomet Polym.Mater.,2012,22:64-69.
[13] LI D K,ZUO M,ZHANG Q,et al.The investigation of continuous nucleation and refinement of primary Si in Al-30Si mushy zone[J].Journal of Alloys and Compounds.2010,502(2):304-309.
[14] BAO G J,LI D K,NIE J F,et al.The phase transition of ZrP induced by Si in Al-Si melts[J].Journal of Alloys and Compounds,2012,528:1-50.
[15] QIAO H,ZHU X Z,GAO T,et al.Influence of deformation on the microstructure and low-temperature refining behavior of Al-3.5Pmaster alloy[J].Journal of Materials Science&Technology,2015,31(4):391-396.
[16] QIAO H,GAO T,ZHU X Z,et al.Generation and evolution of nanoscale AlP and Al13Fe4particles in Al-Fe-P system[J].Journal of Alloys and Compounds,2015:662-668.
[17] ZHANG H.Microstructure and mechanical properties of hypereutectic Al-Si alloy modified with Cu-P[J].Rare Metals,2008,27(1):59-63.
[18] GUO J,LIU Y,FAN P X,et al.The modification of electroless deposited Ni-P master alloy for hypereutectic Al-Si alloy[J].Journal of Alloys and Compounds,2010,495(1):45-49.
[19] OKAMOTO H.Supplemental literature review of binary phase diagrams:Ag-Ni,Al-Cu,Al-Sc,C-Cr,Cr-Ir,Cu-Sc,Eu-Pb,HV,Hf-Sn,Lu-Pb,Sb-Yb,and Sn-Y[J].Journal of Phase Equilibria&Diffusion,2013,34(6):493-505.
[20] OKAMOTO H.Supplemental literature review of binary phase diagrams:Al-P,B-Ga,B-Nd,Ba-Ga,Bi-Cs,Ca-Ga,Cd-Gd,CrMo,Gd-Ni,Ni-Pb,Ni-Sc,and Sc-Sn[J].Journal of Phase Equilibria&Diffusion,2015,36(5):518-530.