Abstract:The heat transfer behavior of 1510mm*250mm slab in continuous casting mould was modeled and calculated. The heat flux densities in the different heat transfer layers between mould, mould flux and solidified strand shell were assumed to be equal, and the temperature distribution in the slab and mould plate were calculated by the coupled thermodynamic model. The heat transfer modeling results have compared with the industrial production data of continuous casting mould and the temperature data measured by thermocouples imbedded in mould, and the reliability of the results was verified. When the casting speed was set as 1 m/min, the solidified shell thickness at the mould exit were 18.7 mm at center of slab wide face. Increasing the casting speed, the solidified shell thickness at the mould exit decreased. Furthermore, with the temperature variation curves of slab strand calculated by the heat transfer model, the microstructure evolution during solidification of materials Fe-0.04C-1.36Mn and Fe-0.14C-1.36Mn, which have different carbon contents, were simulated and compared with the phase field method. Under the same cooling conditions, the solidified strand shell formed by Fe-0.04C-1.36Mn was denser, and the volume fraction of liquid left between dendrites was much lower. Therefore, it can be considered that the quality of solidified shell of material Fe-0.04C-1.36Mn is better, and it is easier to avoid breakout in casting mould and the problem of surface cracks.
杨丽 柴锋 罗小兵 苏航 Erwin Wosch Dieter Senk. 连铸结晶器内板坯传热凝固行为建模和模拟[J]. , 2019, 38(4): 0-0.
Li YANG Feng Chai Xiao-bing LUO SU Hang Erwin Wosch Dieter Senk. Modelling and Simulation of heat transfer and solidification behavior of slab in continuous casting mould. , 2019, 38(4): 0-0.