Temperature evolution of a working piece during hot rolling has a significant influence on the microstmcture and final mechanical properties of the material. As the measurement technologies improve, on-line measuremen...Temperature evolution of a working piece during hot rolling has a significant influence on the microstmcture and final mechanical properties of the material. As the measurement technologies improve, on-line measurement of the temperature across the strip width has become accessible, and thus monitoring and control of the transversal temperature distribution during hot rolling can be realized. The scanning of the temperature across the strip width can help us to understand the state of the temperature variation at the strip edges and as a result help us improve the temperature homogeneity of the strip. In this paper, reaearch on temperature distribution along the strip width is reviewed first, and then the mechanism of the scanning measuring devices is introduced. With the temperature scanning measurement data taken from the finishing mill entry point and the down coiler entry point, the temperature distribution at the strip edges is analyzed. It is pointed out that the roughing process is the main contributor to the temperature inhomogeneity. Furthermore,the contribution of the edger heater to the temperature homogeneity is investigated.展开更多
A new theoretical thermomechanical explanation of the uneven transverse temperature distribution, along the width for thin and wide hot rolled strip was proposed. In particular, starting from the irregular pressure an...A new theoretical thermomechanical explanation of the uneven transverse temperature distribution, along the width for thin and wide hot rolled strip was proposed. In particular, starting from the irregular pressure and friction distribution which led to an uneven heat generation, a 2D mathematical model of calculating the transverse termperature distribution was presented. A physical explanation for this problem was given and the model was used as an essential basis to build a corresponding FEM simulation model, in which heat loss and generation were considered. Deformation and friction heat were described in details. For a clearer and more logical analysis, the heat generation problem was split into two parts： one for the strip centre, and one for the sides, in correspondence with the temperature peak points at 100 mm from the strip edge. Finally, the result shows that how thenew theoretical model can lead to the exact interpretation of the measured uneven temperature distribution.展开更多
文摘Temperature evolution of a working piece during hot rolling has a significant influence on the microstmcture and final mechanical properties of the material. As the measurement technologies improve, on-line measurement of the temperature across the strip width has become accessible, and thus monitoring and control of the transversal temperature distribution during hot rolling can be realized. The scanning of the temperature across the strip width can help us to understand the state of the temperature variation at the strip edges and as a result help us improve the temperature homogeneity of the strip. In this paper, reaearch on temperature distribution along the strip width is reviewed first, and then the mechanism of the scanning measuring devices is introduced. With the temperature scanning measurement data taken from the finishing mill entry point and the down coiler entry point, the temperature distribution at the strip edges is analyzed. It is pointed out that the roughing process is the main contributor to the temperature inhomogeneity. Furthermore,the contribution of the edger heater to the temperature homogeneity is investigated.
文摘A new theoretical thermomechanical explanation of the uneven transverse temperature distribution, along the width for thin and wide hot rolled strip was proposed. In particular, starting from the irregular pressure and friction distribution which led to an uneven heat generation, a 2D mathematical model of calculating the transverse termperature distribution was presented. A physical explanation for this problem was given and the model was used as an essential basis to build a corresponding FEM simulation model, in which heat loss and generation were considered. Deformation and friction heat were described in details. For a clearer and more logical analysis, the heat generation problem was split into two parts： one for the strip centre, and one for the sides, in correspondence with the temperature peak points at 100 mm from the strip edge. Finally, the result shows that how thenew theoretical model can lead to the exact interpretation of the measured uneven temperature distribution.
