Solidification End Determination Of Continuous Casting Slab Based On Pulse Vibration Method

It is a very important parameter to determine the solidification process and technological parameters of continuous casting production. The determination of the end position is the premise and key to improve the center porosity and segregation of casting slab. Therefore, it has important theoretical and practical significance to study the solidification process and the position of the solidification end.A two dimensional solidification heat transfer model of slab continuous casting is established. The temperature field distribution and the thickness of the billet are simulated. The influence of the surface temperature, the temperature and the ratio of the casting billet on the surface temperature, the thickness of the shell, the liquid core length and the pressure are verified.A thermal elastic-plastic finite element model is established for the process of continuous casting of slab. The influence of different pressure and liquid core thickness on the efficiency of the press is analyzed. The relationship between the efficiency and the thickness of the liquid core is fitted by the processing of the data.A method for determining the position of a slab continuous casting at the end of the mold is presented. According to the relationship between the pressure and the thickness of the liquid core, the theoretical relationship between the amplitude and the thickness of the liquid core in the liquid core is derived. Using the finite element simulation software and the actual production situation of steel mill, the method is verified by simulation study. The results are compared with the results obtained by the two methods, and the innovation method is proved to real and reliable.Through the research of this paper, the solidification process of slab is defined, and a new method to detect the position of the solidified end is established. It has a certain theoretical significance and practical value for improving the quality of slab.