Modeling Of Microstructural Organization And Prediction Of Mechanical Properties In CSP Cooling Zone Of Thin Slab Continuous Casting And Continuous Rolling

In this paper, combined with Q235B steel which made in Compact Strip Production of Thin slab continuous casting and continuous rolling in HuNan HuaLin Iron and Steel Company, Author has made the research and simulation to the temperature field, microstructural organizations and mechanical properties of the kind of Q235B steel during cooling zone, And has analysed about various kinds of factors which influenced performance. Among simulating in temperature field, it uses the PDE toolboxes of Matlab through inputting initial conditions in the borders to solve Partial Differential Equation of Heat transfer, calculate and display temperature distribution situations of section of the plate, And using inserting-value calculate the temperature values, educe the variational laws of the temperature in cooling phase. While doing microstructural organizations simulation, Author has consulted the domestic and international achievement in this field , Chosen the suitable phase transformation model and mechanics model, and worked out the simulation-calculating procedure with VB. The input data of procedure are the chemical composition, rolling technical parameters, and the state of microstructural organizations after finishing rolls, the output data are the final organization state, grain sizes, mechanical properties after cooling. And using the experimental data and testing reports of metal phases of Q235B steel to verify the simulation. The results indicates that utilizing temperature field that Matlab imitates and combining with organization, mechanical properties that VB calculates can simulate temperature change and microstructural evolution in the course of cooling after hot rolling, and make better precision of simulation, offer the new trains of thought for simulation after CSP rolls , and can study and apply it into practice further.