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| HYDRODYNAMIC EQUATIONS OF THE PROCESS OF CHILL BLOCK MELT-SPINNING |
| CHEN Jinchang; XU Liyu; PEN Changpin (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing) |
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Cite this article:
CHEN Jinchang; XU Liyu; PEN Changpin (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing). HYDRODYNAMIC EQUATIONS OF THE PROCESS OF CHILL BLOCK MELT-SPINNING. Acta Metall Sin, 1983, 19(2): 118-125.
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Abstract The distribution of vorticity, velocity and temperature of the melt puddle were obtained by the viscous hydrodynamic equations. It is found that the thickness of thermal gradient layer, ΔR_T, and viscous shear layer, ΔR_v, of the alloy Fe_(40)Ni_(40)P_(14)B_6 are 140 and 11μm respectively. The quench rate on the ribbon at the ribbon-melt interface is (4.6—2.3)×10~6℃/s, and the solidification time is (0.8—1.6)×10~(-4)s. The empirical equations of thickness, h, and width, b, of the amorphous wide ribbons are in accord with the experimental data in the range of 3—5%. The observed relations among h, b and wheel velocity, ν_r, are well described by the model of nearly ideal cooling. The Prandtl number, Pr=7.8×10~(-2) indicating the thermal gradient layer was 13 times thicker than the viscous shear layer, and the Nusselt number, Nu=1—2 indicated intermediate cooling condition at the ribbon-wheel interface.
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Received: 18 February 1983
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1 Hasegawa, R.; Handley, R. C. O., Rapidly Quenched Metals, Section 1, Ed, Grant, N. J., et at., MIT, Cambridge, 1976, p. 459．
2 Gyorgy, E. M., Metallic Glasses, ASM, 1978, p. 275．
3 Grahm, C. D., Jr.; Egami, T., Ann. Rev. Mater. Sci., 8 (1978) , 423．
4 Liebermann, H. H., IEEE Trans., Magn., MAG-15 (1978) , 1393．
5 Ruhl, R. C., Mater. Sci. Eng., 313 (1967) , 1．
6 Anthony, T. R.; Cline, H. E., J. Appl. Phys., 50 (1979) , 245．
7 Cline, H. E.; Anthony, T. R., ibid., 50 (1979) , 239．
8 Cline, H. E.; Anthony, T. R., ibid., 49 (1978) , 829．
9 Kavesh, S., Metallic Glasses, ASM, 1978, p. 36．
10 Schlichting, H., Boundary Layer Theory, McGraw-Hill, New York, 1960, Chap. 2．
11 Walter, J. D., Rapidly Quenched Metals Ⅲ, Vol. 1, Ed. Cantor, B., The Metals Society, London, 1978, p. 30．
12 Hillmann, H.; Hilizinger, H. R., ibid., p. 22．
13 Davies, H. A., ibid., p. 1．
14 陈金昌;徐礼宇;马洪良;彭长平;毛向华,钢铁研究总院学报,2(1982) ,№1,p.45．
15 Jones, H., Rep. Prog. Phys., 36 (1973) , 1425．X |
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