在悬浮铸造的基础上引入了电磁搅拌,并将其与悬浮铸造的优点有机结合,通过不同电磁搅拌时间对悬浮铸造AZ61变形镁合金进行了试验,悬浮剂的加入使合金液中形成了大的能量起伏和成分起伏,有助于形成细晶组织,电磁搅拌的引入加速了悬浮剂和合金母液的均匀混合,有效避免了悬浮剂在合金液中的聚集"搭桥"现象和悬浮剂在铸件中的夹生,结果表明在悬浮剂为2%(质量分数)时进行2 min搅拌时效果最佳,组织的平均晶粒度最小,达到57.5 μm,是悬浮铸造时的三分之一,是金属型铸造的四分之一.析出相Mg17Al12明显减少和细化,并且在基体上的分布更加弥散.电磁悬浮铸造(2min,2%)对比金属型铸造,抗拉强度提高了约20%,屈服强度提高了约30%,延伸率提高了近50%.
参考文献
| [1] | CHEN Zhenhua,YAN Hongge,CHEN Jihua,Magnesium Alloys (Beijing,Chemical Industry Press,2004) p.1(陈振华,严红革,陈吉华,镁合金(北京,化学工业出版社,2004)p.1) |
| [2] | LIU Zheng,WANG Yue,WANG Zhongguang,Developing trends of research and application of magnesium alloys,Chinese Journal of Materials Research,14(5),450(2000)(刘正,王越,王中光,镁基轻质材料的研究与应用,材料研究学报,14(5),450(2000)) |
| [3] | N.V.Ravi Kumar,J.J.Blandan,C.Desrayaud,Grain refinement in AZ91 magnesium alloy during thermo mechanical processing,J.Materials and Engineering,A359,150(2003) |
| [4] | WU Xia,LIU Yi,Super plasticity of coarse-grained magnesium alloy,J.Scripta Materialia,46,269(2002) |
| [5] | Zenji Horita,Takayoshi Fajinami,Langdon T.G.,The potential for scaling ECAP:effect of sample size on grain refinement and mechanical properties,Materials Science and Engineering,A318,34(2001) |
| [6] | J.R.Bowen,A.Gholinia,S.M.Roberts,Analysis of the billet deformation behavior in equal channel angular extrusion,J.Materials Science and Engineering,A287,87(2000) |
| [7] | Y.C.Lee,A.K.Dahle,D.H.Sbjohn,Grain refinement of magnesium,Magnesium Technology 2000,211(2000) |
| [8] | Yosuke Tamura,Tadashi Haitani,Eiji Yano,Grain refinement of high purity Mg-Al alloy ingots and influences of minor amounts of iron and manganese on cast grain size,J.Materials Transactions,43(11),2784(2002) |
| [9] | Qinglin Jin,Jeong-pil Eom,Su-Gun Lin,Won-Wook Park,Bong-Sun You,Grain refining mechanism of a carbon addition method in a Mg-Al magnesium alloy,J.Scripta Materialia,49,1129(2003) |
| [10] | Ma Qian,P.Cao,Discussions on grain refinement of magnesium alloys by carbon inoculation,J.Scripta Materialia,52,415(2005) |
| [11] | L.Lu,A.K.Dahle,D.H.StJohn,Grain refinement efficiency and mechanism of aluminium carbide in Mg-Al alloys,J.Scipta Materialia,53,517(2005) |
| [12] | Mark A.Easton,Andreas Schiffl,Ji-YongYao,Helmut Kaufmann,Grain refinement of Mg-Al(-Mn) alloys SiC additions,J.Scipta Materialia,55,379(2006) |
| [13] | Y.C.Lee,A.K.Dahle,D.H.Sbjohn,The role of solute in grain refinement of magnesium,J.Metallurgical and Materials Transaction,A31,2895(2000) |
| [14] | Wang Qudong,Chen Wenzhou,Ding Wenjiang,Effect of Sb on the microstructure and mechanical properties of AZ91 magnesium alloy,J.Metallurgical and Materials Transactions,A32,787(2001) |
| [15] | Yuan Guangyin,Sun Yangshan,Ding Wenjiang,Effects of bismuth and antimony additions on the microstructure and mechanical properties of AZ91 magnesium alloy,J.Materials Science and Engineering,A308,38(2001) |
| [16] | V.A.Efimov,Suspension casting technological foundametals,48th International Foundry Congress (Varna,Bulgaria,1981) p.23 |
| [17] | WANG Jinhua,Suspension Casting (Beijing,Defence Industry Press,1982) p.1-2(王金华,悬浮铸造(北京,国防工业出版社,1982)p.1-2) |
| [18] | K.Kubota,M.Mabuchi,K.Higashi,Review processing and mechanical properties of fine-grained magnesium alloys,Journal of Materials Science,34(10),4311(1999) |
| [19] | WANG Hongxia,CHANG Yanhong,XU Lin,The effect of suspension casting on the microstructure and properties of ZA27,Resfarch Studies on Foundry Equipment,(2),5(2002)(王红霞,常艳红,徐林,悬浮铸造对ZA27合金组织性能的影响,铸造设备研究,(2),5(2002)) |
| [20] | ZHOU Chunming,FENG Jianhua,LONG Wenyuan,The effect of floating casting on the structure heredity of Al-Cu alloys,Journal of Nanchang Institute of Aeronautical Technology,(4),13(1998)(周春明,冯建华,龙文元,悬浮浇铸对铝铜合金组织遗传性的影响,南昌航空工业学院学报,(4),13(1998)) |
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