Simulation Of Huge Rectangular Ingot By Different Intensive Cooling

In this paper, a special method of intensive cooling outside mold has been presented to produce huge rectangular ingot. The solidification and heat transfer of a 60t huge rectangular ingot has been simulated by mathematical simulation and physical simulation experiment combination of methods in this paper.Firstly,In a physical model designed by using similitude theory, the steel solidification progress were simulated by using Na2S203.5H20, and the growth of crystal structure, the final solidification location were observed. Physical simulation result verify the feasibility of strong cold process.Secondly, establishing the three-dimensional entity mold by pro/e software and ingot solidification heat-transfer mathematic model, and it has been the simulation calculation by ProCAST software. Through the solidification time, the temperature distribution, heat flux distribution and the position of loose and shrinkage show the feasibility of strong cold process.The results of the study show that the solidification times of ingot body was shortened by increasing the cooling intensity and the position of loose and shrinkage of ingot was higher by increasing the cooling intensity. Compared with air cooling, the solidification time of wind cooling shorten the 3.5 h, the shrinkage of the position higher but do not reduce the volume; Because of the heat transfer ingot mold restrictions, compared with wind cooling, the effect of water cooling is not obvious. So this paper hold out "gradient" cooling .It is that the upper of ingot mold is air cooling and the bottom of ingot mold is wind cooling .Compared with air cooling, at the "gradient" cooling the solidification times of ingot body reduces 2.7 h, the position of loose and shrinkage of ingot rise 60 cm and shrinkage cavity volume reduces 8000 cm3.Mathematical simulation and physical simulation experiment results tell us that by intensive cooling, the solidification time of the can be obviously shortened, internal soundness can be ensured and the surface quality could be improved.