The Experiment Research And Numerical Simulation Of Mold Temperature Field For Continuous Casting Of Steel

Continuous casting technique is very important in the production of metallic material. The level of continuous casting technique has been the standard of modernization degree of iron and steel industry. Mold is the heart of continuous casting machine. The continuous casting technique develops along with the development of mold technique. The numerical simulation of solidification process is the core of application of computer in cast production. Numerical simulation instead of part of the conventional experience experiments can not only increase product efficiency and decrease cost and energy sources, but also lessen environment pollution. The heat transfer and thermal distortion of mold affects the surface and inside quality of billets, and the employ life of mold has effect on billets yield. Hence the paper makes the mold temperature field to be the center and performs the following research integrating the simulation and experiments.Experiments of dynamic and static for mold working process were designed and performed, the measure results indicates that the boundary temperature of mold wall always approaches that of cooling-water under the cooperation of molten metal and cooling-water.The mathematical model of equivalent thermal conductivity coefficient was built, which made the numerical simulation of billet including mold possibly during the continuous casting of steel.The experiments of column continuous casting were performed. The metal is Sn-Pb Alloy, and column diameter is 30mm, and casting speed is 3mm/s, and cooling water flux is 0.08m3/h. The experiments results agree with the calculation, which validates the feasibility of numerical simulation software.In order to make the study of boundary heat-transfer for cast and mold completely, the paper pursued experiments for common cast. The experiments got the rules of temperature distribution and solidification structure under different cooling boundary of sand mold and metal mold.VC++ programs were written to calculate the temperature field of mold for billet continuous casting of steel. The calculations got the distribution rules of temperature field for mold, and the effects of techniques parameters on temperature field were also calculated. During the continuous casting process, casting speed, cooling-water flux and mold wall thickness are the main factors. And the effects of metal level and pouring temperature are not so clear.