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| 1 | NUMERICAL SIMULATION OF THE THERMO-MECHANICAL PROCESS FOR BEAM BLANK CONTINUOUS CASTING显示文摘The aim of this study was to simulate the solidification process of beam blank continuous casting, and then find the reasons for the typical defects of the beam blank. A two-dimensional transient coupled finite element model has been developed to compute the temperature and stress profile in beam blank continuous casting. The enthalpy method was used in the heat conduction equation. The thermo-mechanical property in the mushy zone was taken into consideration in this calculation. It is shown that at the mold exit the thickness of the shell had its maximum value at the flange tip and its minimum value at the fillet. The temperature had a great fluctuation on the surface of the beam blank in the secondary cooling zone. At the unbending point, the surface temperature of the web was in the brittleness temperature range under the present condition. To ensure the quality, it is necessary to weaken the intensity of secondary cooling. At the mold exit the equivalent stress and strain have higher values at the flange tip and at the web. From the spray 1 to the unbending point, the maximum values of stress and strain gradually moved to the internal section of the flange tip and the web. However, whenever, there were bigger stress and strain values near the flange tip and the web than in the other parts, it must be very easy to generate cracks at those positions. Now, online verification of this simulation has been developed, which has proved to be very useful and efficient to instruct the practical production of beam blank continuous casting. | W. Chen Y.Z. Zhang C.J. Zhang L.G. Zhu B.X. Wang W.G. Lu J.H. Ma | 2007 | Acta Metallurgica Sinica(English Letters)2007，20，4： | 8 |
| 2 | STUDY ON VERTICAL WATER TEMPERATURE MODEL FOR MIYUN RESERVOIR显示文摘According to the characters of the Miyun reservoir located in northeast Beijing, one dimensional method is used to establish the mathematical model of temperature for the reservoir. In this model the heat exchange between water surface and atmosphere, effective diffusion, inflows, outflows, and thermal advection are considered comprehensively. The effective diffusion coefficient, decay coefficient of short wave in water, etc. are calibrated based on the observed stratification data of 1991 in the reservoir. The mathematical model is verified well with the data of 1992. This model can be used to predict the temperature distribution along the vertical direction for the Miyun reservoir and other similar reservoir. | Li, Y.L. Chen, Y.C. Zhang, B.X. | 2000 | Journal of Hydrodynamics2000，12，4： | 5 |
| 3 | Flagellin-PAc Fusion Protein is a High-efficacy Anti-caries Mucosal Vaccine显示文摘 | Y. Sun W. Shi J.Y. Yang D.H. Zhou Y.Q. Chen Y. Zhang Y. Yang B.X. He M.H. Zhong Y.M. Li Y. Cao Y. Xiao W. Li J. Yu Y.H. Li M.W. Fan H.M. Yan | 2012 | Journal of Dental Research2012，，10： | 1 |
| 4 | PHASE COMPONENT AND CURIE TEMPERATURE OFNd_4(Fe_(1-x)Cr_x)_(77.5)B_(18.5)ALLOYS显示文摘The phase component and Curie tempemture of Nd4(Fe1-xCrx)77.5B18.5 (0 0.1. The magnetic measurement shows that Curie temperutures of Fe3B and Nd2Fe14B phases decrease with increasing Cr content. The influence of the substitution of Cr for Fe was discussed. | B.X. Gu J.R. Zhang B.G. Shen and H Wang (Department of Physics, Nanjing University, Nanjing 210093, China)(State Key Lab. of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China)(Department of Physics, Southeastern Universit | 1997 | Acta Metallurgica Sinica(English Letters)1997，10，1： | 0 |
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