制备Mg-3Sn-Mn合金型材,研究了连续流变成形工艺条件对制品组织的影响机理.结果表明:当轧辊转速一定而合金浇注温度在690-750℃变化时,随着浇注温度的降低,结晶前沿的成分过冷度增大,合金中心固相率增加,从而使制品边部柱状晶区增大,中心等轴晶区减小,等轴晶区的晶粒平均直径减小.当合金浇注温度一定,二轧辊转速在O.052-0.087 m.s-1变化时,随着轧辊转速的减小凝固界面趋于稳定,合金在辊靴型腔中随剪切时间的增加制品边部柱状晶区减小,中心等轴晶区增大.浇注温度为690℃、轧辊转速为0.052 m.s-1时制备的断面为5 min×50 mm的镁合金型材,其表面质量和组织良好,制品晶粒平均直径为27μm.
参考文献
| [1] | R.F.Decker,The renaissance in magnesium,Advanced Material & Process,157(9),31(1998) |
| [2] | YU Kun,LI Wenxian,WANG Richu,MA Zhengqing,Research,development and application of wrought magnesium alloys,The Chinese Journal of Nonferrous Metals,13(2),277(2003)(余琨,黎文献,王日初,马正青,变形镁合金的研究、开发及应用,中国有色金属学报,13(2),277(2003)) |
| [3] | A.Ylamashita,Z.Horita,T.G.Langdon,Improving the mechanical properties of magnesium and a magnesium alloy through severe plastic deformation,Mat.Sci.Eng.,A300,142(2001) |
| [4] | A.Bussiba,A.Benartzy,A.Shtechman,S.Ifergan,M.Kupiec,Grain refinement of AZ31 and ZK60 Mg alloys-towards superplasticity studies,Mat.Sci.Eng.,A302,56(2001) |
| [5] | J.B.Colleen,A.G.Mark,Current wrought magnesium alloys strengths and weaknesses,JOM,57(5),46(2005) |
| [6] | Y.Chino,M.Kobata,H.Wasaiki,M.Mabuchi,An investigation of compressive deformation behaviour for AZ91 Mg alloy containing a small volume of liquid,Acta Materialia,51,3309(2003) |
| [7] | M.C.Flemings.Behavior of metal alloys in the semisolid state,Metall.Trans.,22A,957(1991) |
| [8] | D.H.Kirkwood,Semisolid metal processing,International Materials Reviews,39,173(1994) |
| [9] | S.P.Midson.Rheocnsting processes for semi-solid casting of aluminum alloys,Die Casting Engineer,50(1),48(2006) |
| [10] | S.Ji,Z.Fan,M.J.Bevis,Semi-solid processing of engineering alloys by a twin-screw rheomolding process.Mat.Sci.Eng.,A299,210(2001) |
| [11] | R.A.Martinez,M.C.Flemings,Evolution of particle morphology in semisolid processing,Metallurgical and Materials Transactions A,30(8),2205(2005) |
| [12] | D.Apelian,Q.Y.Pan,M.Findon,Low cost and energy efficient methods for the manufacture of semi-solid(SSM)feedstock,Die Casting Engineer,48(1),22(2004) |
| [13] | T.Haga,P.Kapranos,Simple rheocasting processes,Journal of Materials Processing Technology,130/131,594(2002) |
| [14] | T.Haga,K.Tkahashi,M.Ikawaand,H.Watari,Twin roll casting of aluminum alloy strips,Journal of Materials Processing Technology,153-154,42(2004) |
| [15] | WEN Jinglin,GUAN Renguo,LIU Xianghua,Manufaeturing semisolid A2017 alloy by srs Proeess and semisolid extending forming,Chinese Journal of Materials Research,17(1),56(2003)(温景林,管仁国,刘相华,A2017半固态合金的半固态扩展成形,材料研究学报,17(1),56(2003)) |
| [16] | ZHAO Zhanyong,GUAN Renguo,LI Jiangping,WANG Fuxing,Effect of casting temperature on microstructure of AZ31 alloy in continuous rheo-extrusion process,Journal of Northeastern University(Natural Science),31(4),535(2010)(赵占勇,管仁国,李江平,王付兴,浇注温度对AZ31镁合金连续流变挤压成形组织的影响,东北大学学报(自然科学版),31(4),535(2010)) |
| [17] | HU Hanqi,Metal Solidification principle(Beijing,China Machine Press,2000)p.127(胡汉起,金属凝固原理,第二版,(北京,机械工业出版社,2000)p.127) |
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