The microstructure of semi-solid slurry of AZ91D alloy, which was produced by twin-screw stirring mixer under the different parameters, was investigated.Rheoforming by cold chamber die casting process was performed thereafter. The results indicate that with decreasing of the barrel temperature of the mixer and the pouring temperature of molten Mg alloy, the solid fraction of semi-solid slurry increases and the size of non-dendritic grains becomes smaller. While the shear rate increases, the solid fraction of semi-solid slurry decreases. The tensile strength and elongation of metal rheoformed by die casting are higher by about 37% and 44% respectively than those produced by conventional liquid die casting.
参考文献
| [1] | Mordike B L;Ebert T .Magnesium Properties-Applications-Potential[J].Materials Science and Engineering,2001,302(A):37-45. |
| [2] | H. Friedrich;S. Schumann .Research for a "new age of magnesium" in the automotive industry[J].Journal of Materials Processing Technology,2001(3):276-281. |
| [3] | Dorsan H W .Schmelz Technologic Fuer Hoch Produktive Magnesium Giessrichtungen[J].Giesserei,1993,83(01):13-16. |
| [4] | Fukuoka S .Transitions in the Semi-solid Metal Processing Technics and Theirevelopment into the New Century[J].Journal of the Society for Technology of Plasticity,2000,41(479):1156-1161. |
| [5] | Kapranos P;Ward P J;Atkinson H V .Near Net Shaping by Semi-solid Metal Processing[J].Materials & Design,2000,21:387-394. |
| [6] | CHEN Ti-jun,HAO Yuan,SUN Jun.Effects of Compression Parameters on Deformation Behaviors of Semi-Solid ZA27 Alloys[J].武汉理工大学学报(材料科学版)英,2003(03):9-14. |
| [7] | Sahm P R.SSM in Europe[A].Light Metal Age,1998:467-475. |
| [8] | Suéry M.Recent Advances in Semi-solid Processing[A].Japan,2002:31-38. |
| [9] | Joly P A;Menharbian R .The Rheology of a Partially Solid Alloy[J].Materials Science,1976,1:1393-1418. |
| [10] | Kitamara K .Thixomolding Process of Mg Alloy[J].Sokeizai,1995,36(05):1-7. |
| [11] | Midson S P;Brissing K .Semi-solid Casting of Aluminum Alloys:a Status Report[J].Modern Casting,1997,2:41-43. |
| [12] | Luo Jirong;Wu Shusen;Song Xiangjuen .Device for Making Semi-Solid Slurry of Metals[P].China PatentNo.ZL01211744.2,2002. |
| [13] | ASM International Handbook Committee.Metals Handbook(Vol 2)[M].Tenth Edition.Ohio:ASM International,1990:496-497. |
| [14] | M C Flemings .Behavior of Metal Alloys in the Semi-Solid State[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1991,22(b):269-293. |
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