A Study on the Heat Transfer Characteristics of Steel Plate in the Matrix Laminar Cooling Process

Abstract

Accurate prediction and control of the steel plate temperature in the laminar cooling process are very challenging. In this research, an experimental platform was built to measure the heat transfer characteristics of the steel plate in the process of matrix laminar spray cooling when the steel plate is one millimeter away from the upper surface. The “buried couple method” was used, including the cooling temperature and cooling rate. Then, the temperature and the integrated heat transfer coefficient at the steel plate surface were calculated by the time-sequential function method (TSFM). The obtained results show that the fast cooling stage under the water cooling condition occurred in the first 1.5 s, and the measuring point temperature decreased by 8%. The “re-reddening” phenomenon of the steel plate appeared with time, and the measuring point temperature increased by 37%. Second, the maximum calculated difference between the surface temperature and the measuring point temperature was 0.75 °C, and the integrated heat transfer coefficient conformed to the periodic boundary features. The comprehensive convective heat transfer coefficient on the surface was in agreement with the periodic boundary characteristics, and its value exhibited oscillatory attenuation with the cooling process, and the oscillatory peak period was about 6 seconds. Two methods, sequential function method (SFM) and finite difference method (FDM), were used to verify the correctness of TSFM.

Research on the Temperature and Thermal Stress of the Roll Quenching Process of Thin Plates

“…Therefore, the establishment of a convective heat transfer coefficient corresponding to the temperature is necessary to ensure the accuracy of the calculation [19,20]. The study of the law of convective heat transfer coefficient on the surface of steel plate during the quenching process plays a key role in improving the quenching efficiency and forecasting the temperature field distribution of the steel plate [21,22]. At present, most of the research on the quenching process temperature field and stress field uses both the physical experimental method and the numerical simulation method [23][24][25].…”

Thermal Modeling of the Port on a Refining Furnace to Prevent Copper Infiltration and Slag Accretion

“…Furthermore, a lack of information regarding the heat transfer from the slag flow to the plate was found, since no reference to the thermal characterization of this process was found in the technical literature. Hence, an experiment was designed to estimate the heat transfer coefficient [6].…”