Ultra-fast Cooling Technique Test Of H Beam And Simulation Of Temperature Field

As a kind of economically affordable steel, H-beam steel is widely used in the field of engineering construction. At the same time, the customers have higher requirement on its performance. It is one of the necessary ways, which realize the economic production with high strength, uniform performance and well comprehensive performance, to improve competitiveness for enterprises. Ultra-fast cooling technology provides an effective way to realize this aim. Not only can it improve the internal structure and mechanical properties of hot-rolled H-beam steel, but also can provides conditions for the development of new high strength steel.To achieve this goal, the thesis appointed that there should be ultra-fast cooling control device in the export of the UF and along H beam rolling line and found a suitable technique for different kind of H beam, by testing continually using ultra-fast cooling control device. The main research of the thesis is as follows:(1) The ultra-fast cooling way was adopted aiming at the special character of H beam cooling. And the ultra-fast cooling control device for H beam was designed according to the characteristics of the production line.(2) It takes Q235 and Q345 H beam steel as research object, using for ultra-fast cooling technology research. First, the cooling process was explored according to using different parameters. And then through analyzing and comparing various performance indicators, we can find whether the ultra-fast cooling system can well meet the on-site process and rolling production requirements after putting into application or not.(3) According to the temperatures after ultra-fast cooling, the temperature field of H beam section during different cooling conditions were simulated by using ANSYS FEM software. To gain uniform section temperature after ultra-fast cooling and more reasonable layout of spray nozzles, heat transfer coefficients at different part of the section were optimized. And then apply into industrial production.(4) The deformation of H beam after ultra-fast cooling was also simulated by using ANSYS FEM software. We can find the deformation influence of ultra-fast cooling by different cooling parameters. And then find the factors of deformation and modify the ultra-fast cooling device accordingly.