通过分析离心力场中金属铝熔液在Al2O3短纤维多孔介质内的渗流传热,考虑了离心惯性力对铝熔液的瞬态固化与再熔的影响,建立了旋转多孔介质内的渗流传热理论模型.研究了复合管铸造工艺中不同工况下液固共融区的长度和固化率的瞬态变化规律以及流场压损的分布规律.结果表明:在Al2O3颗粒的预热温度低于铝熔化温度的条件下,当渗透前沿达到一定深度时出现液固共融,随后液固共融区随渗透过程而增长,固化率逐渐提高.随着孔隙率的减小,液固共融区的长度和固化率增大,出现共熔现象的固化率降低,复合层能达到的最大厚度减小.而随着转速的减小,液固共融区长度缩短,共熔区内的固化率水平提高,出现共熔现象的固化率增大,复合层能达到的最大厚度减小.
参考文献
| [1] | G.Amberg, Parameter Ranges in Binary Solidification from Vertical Boundaries, Int.J.Heat Transfer, 40(11),2565(1997) |
| [2] | M.Reza Aboutalebi, M.Hasan, R.I.L.Guthrie. Coupled Turbulent Flow, Heat, and Solute Transport in Continuous Casting Processes, Metallurgical and Materials Transactions B, 26B, 731(1995) |
| [3] | A.Mortensen, L.J.Masur, J.A.Cornie, M.C.Flemings, Infiltration of Fibrous Preforms by a Pure Metal: Part Ⅰ . Theory, Metallurgical transactions A, 20A, 2535(1989) |
| [4] | A.Mortensen, V.Michaud, Infiltration of Fiber Preforms by a Binary Alloy: Part Ⅰ . Theory, Metallurgical transactions A, 21A, 2059(1990) |
| [5] | X.Tong, J.A.Khan, Infiltration and Solidification/Remelting of a Pure Metal in a Two-Dimensional Porous Preform, Journal of Heat Transfer, 118, 173(1996) |
| [6] | J.A.Khan, X.Tong, Unidirectional Infiltration and Solidification/Remelting of Al-Cu Alloy, Journal of Thermophysics and Heat Transfer, 12(1), 100～106(1998) |
| [7] | J.W.Lu, F.Chen, Rotation Effect on the Convection of Binary Alloys Unidirectionally Solidified from Below,Int. J. Heat Transfer, 40(2), 237(1997) |
| [8] | A.P. Ogurtsov, I.A.Milen'kij, S.E.Samokhvalov, A.V.Gress, Numerical Method for Calculating the Filling of a Mold and Heat Transfer of a Melt under the Action of Centrifugal Forces, Inzhenerno-Fizicheskii Zhurnal,68(4), 678(1995) |
| [9] | Wang Yuwei(王玉玮),Liu Jinping(刘进平),Shi Tingzao(施廷藻),Tong Mingduo(佟铭铎),A Development Study of Surface Wear-resistance Composites with Ferrite-based SiC Ceramic Particles, Foundry, (11),15(1990) |
| [10] | M.A.Taha, N.A.EI-Mahallawy, Metal-matrix Composites Fabricated by Pressure-assisted Infiltration of Loose Ceramic Powder, Journal of Materials processing Technology, 73, 139(1998) |
| [11] | Y.Nishida, I.Shirayanagi, Y.Sakai, Infiltration of Fibrous Preforms by Molten Aluminum in a Centrifugal Force Field, Metallurgical and Materials Transaction A, 27A, 4163(1996) |
| [12] | Y.Nishida, G.Ohira, Modelling of Infiltration of Molten Metal in Fibrous Preform by Centrifugal Force, Acta Mater., 47(3), 841(1999) |
| [13] | HU Guoxin(胡国新),TIAN Qinwei(田芩蔚),WANG Guoxiang(王国祥),Heat Transfer of Molten Aluminum Infiltrate through SiC Preform in a Centrifugal Force Field,Journal of Chemical Industry and Engineering (China)(化工学报),53(7),708(2002) |
| [14] | HU Guoxin(胡国新),TIAN Qinwei(田芩蔚),WANG Guoxiang(王国祥),Infiltration of Molten Aluminum and Heat Transfer in Centrifugal Casting Processes,Acta Materiae Composite Sinica(复合材料学报),19(6),25(2002) |
| [15] | A.Mortensen, J.A.Cornic, On the Infiltration of Metal Matrix Composites, Metallurgical Transactions A,18A, 1160(1987) |
| [16] | J.J.Brennan, J.A.Pask, Effect of Nature of Surfaces on Wetting of Sapphire by Liquid Aluminum,J.Am. Ceram. Soc., 51,569(1968) |
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