Research The Model And Development The Software Of Secondary Cooling For Beam Blank Continuous Casting

H-shaped steel is mainly used in bridges, heavy equipment, and high-rise building construction. There are advantages to reduce component weight and so on. For rolling H-shaped steel used beam blank can reduce rolling pass, reducing energy consumption and investment, construction costs, and can significantly increase productivity. However, in beam blank continuous casting process, because of its cross-section geometry of the complex, coupled with difficult to achieve uniform cooling, and thus Beam blank crack more sensitive than billet, slab. The cracks and defects mainly in the inner edge of the web surface cracks, the inner flange of the top corner crack, web thickness 1/2 the center of the crack. Therefore, optimize the design the structure of beam blank casting machine casting process parameters and process parameters is demands.In this paper, contrary to a new beam blank continuous casting machine, established a two-dimensional beam blank continuous casting solidification process of heat transfer mathematical model. Mesh spacing with Variable grid spacing method to discrete model and the used finite difference method to discrete the heat equation. Taking into account the cooling water flow unevenly shaped cross-section billet, establishing a spray of water flow density distribution model, the model can test the water density distribution into a flat-shaped billet flow transverse density distribution.The model can be used to optimize the layout of the nozzle. At the same time the model takes into account a wide area within the arc-shaped blank, wide and narrow plane surface of the nozzle arc discharge different situations, the model closer to reality, making the model with higher accuracy.Application of Visual Basic 6.0 programming language, developed a common secondary cooling beam blank continuous casting simulation software, the software integrates beam blank continuous casting process of solidification and heat transfer simulation and data processing functions for the beam blank casting machine parameters and structures continuous casting process parameters to optimize the design process was provided.Applications developed secondary cooling beam blank continuous casting process simulation software, combined with the beam blank Metallurgical requirements of the guidelines, optimized the design of the secondary cooling system and the continuous casting machine nozzle layout. Analysis the problem of the existing layout of nozzle, proposed two optimization programs for the nozzle layout. Illustrated design the secondary cooling system of beam blank continuous casting process by Q235 steel. Given the temperature changed of Q235 steel under constant casting speed in beam blank continuous casting process. Contrast the temperature distributions, the growth of solidified shell thickness and the feature point temperature changingunder different casting speeds.