Numerical simulation on strip impacting penetration
depth during laminar cooling processHU Bin-bin1，YAN Zheng2
（1. Patent Examination Cooperation Center of the Patent Office， SIPO， Henan， Zhengzhou 450002， Henan， China 2. Institute of Tongren Kowloon Geological Mining Investment and Development Co., Ltd., Tongren 554300， Guizhou， China）
Abstract：The temperature in the zone close to the surface rises and falls over and over again during the laminar cooling process，resulting in the difference of structure and properties in the thickness direction. According to the plant data during CSP hot rolling process in JISCO，a one-dimensional model was established to simulate the strip temperature field during the cooling process. A new concept of impacting penetration depth was put forward，and explored the possible influential factors. The calculated temperature was higher than the measurement，with 3 ℃ for 3 mm thickness strip and 8 ℃ for 4 mm thickness strip，and the relative error was 0.44% and 1.16%，respectively，which proved the rationality of the model and the assumption. The results showed that the impacting penetration depth affected by the heat conductivity coefficient，the convective heat transfer coefficient，the strip surface temperature and the distribution of the nozzles. The impacting penetration depth increased with the increase of convective heat transfer coefficient，but the dense nozzle distribution in the bottom surface played the leading roles，the convective heat transfer coefficient had almost no effects on the impacting penetration depth.
2017, Vol. 27 
