制备ZL201合金半固态坯料、将其二次加热、触变模锻成形以及成形件热处理,研究了工艺条件对成形件的组织和力学性能的影响.结果表明:采用近液相线半连续铸造技术制备的ZL201合金半固态坯料微观组织为大量细小的等轴晶和少量短程枝晶;在适当的工艺条件(在640℃保温5 min,模具温度250～300℃,留模时间10～15 s)下可触变成形出表面光洁的ZL201合金成形件;经过T5处理后,ZL201合金的抗拉强度达到278 MPa,延伸率达到9%,大大高于压铸成形件的性能,其强化相为CuAl2和TiAl3.由于成形速度高,溶体高速充型,造成成形件气孔率高,使ZL201合金半固态压铸成形的组织致密度不如半固态模锻成形件,这是半固态压铸件强度低、模锻件强度高的主要原因.
参考文献
| [1] | M.C.Flemings,R.G.Piek,K.P.Young,The theology of a partially solid alloy,Metall.Trans.,17(3),1925(1972) |
| [2] | M.C.Fleming,Behavior of metal alloys in the semi-solid state,Metall.Trans.,22B(6),269(1991) |
| [3] | D.H.Kirkwood,P.Kapranos,Semi solid processing of alloy,Metal and Materials,11(2),16(1988) |
| [4] | T.Z.Kattamis,T.J.Poccone,Rheology of semi-solid Al4.5%Cu 1.5%Mg alloy,Materials Science Engineering,131A,265(1991) |
| [5] | J.Y.Chen,Z.Fan,Modelling of rheological behaviour of semi-solid metal slurries,Material Science & Technology,18(3),237(2002) |
| [6] | M.Hiral,K.Takebayashi,Y.Yoshikawa,Apparent viscosity of Al-10%Cu semisolid alloy.ISIJ Int,33,405(1993) |
| [7] | H.V.Atkinson,Modelling the semisolid processing of metallic alloys.Progress in Materials Science,50,341(2005) |
| [8] | Cui Chenglin,Verification and numerical simulation for semi-solid modeling the thixoforming process.The Journal of University of Science and Technology Beijing,22(3),237(2001)(崔成林,半固态触变压射成形过程模拟及验证.北京科技大学学报,22(3),237(2001)) |
| [9] | ZHOU Zhihua,MAO Weimin,LIU Zheng,Rheological behavior of semi-solid AlSi4Mg2 aluminum alloy at steady state,Chinese Journal of Materials Research,20(1),5(2006)(周志华,毛卫民,刘正,半固态AlSi4Mg2铝合金的稳态流变性能,材料研究学报,20(1),5(2006)) |
| [10] | ZHOU Tianguo,WEN Jinglin,CHEN Yanbo,Microstructures and properties of 6201 alloy wires manufactured by continuous semisolid forming,Chinese Journal of Materials Research,19(3),331(2005)(周天国,温景林,陈彦博,连续半固态成形6201合金线材的组织和性能,材料研究学报,19(3),331(2005)) |
| [11] | LIU Zheng,MAO Weimin,ZHAO Zhenduo,Preparation of semi-solid slurry of aluminum alloys by a new technology,Chinese Journal of Materials Research,20(2),125(2006)(刘正,毛卫民,赵振铎,用新工艺制备半固态铝合金浆料,材料研究学报,20(2),125(2006)) |
| [12] | WANG Ping,SHI Lifeng,LU Guimin,CUI Jianzhong,Microstructure and properties of ZL201 alloy obtained by near-liquidus electromagnetic casting,Acta Metallurgica Sinica,18(5),653(2005)(王平,史立峰,路贵民,崔建忠,近液相线电磁铸造ZL201合金显微组织,金属学报英文版,18(5),653(2005)) |
| [13] | ZHAO Tao,KANG Hao,SHI Lifeng,WANG Ping,Microstructure and performance of semi-solid rheoformed alloy ZL201,Journal of Northeastern University,27(2),185(2006)(赵涛,康皓,史立峰,王平,ZL201合金半固态电磁流变成形组织与性能,东北大学学报(自然科学版),27(2),185(2006)) |
| [14] | WANG Ping,KANG Hao,SHI Lifeng,Any casting simulating and validating for the die casting of semi-solid ZL201 alloy,Rare Metal Materials and Engineering,35(6),880(2006)(王平,康皓,史立峰,ZL201合金半固态成形的模拟与验证,稀有金属材料与工程,35(6),880(2006)) |
| [15] | WANG Ping,LU Guimin,CUI Jianzhong,Heat stability of semi-solid A356 alloy during remelting process,Rare Metal Materials and Engineering,34(2),231(2005)(王平,路贵民,崔建忠,半固态A356合金重熔加热过程中的热稳定性,稀有金属材料与工程,34(2),231(2005)) |
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