The change of temperature during the cooling process of color steel coil plays an important role in the formation of structure, precipitation of secondary phase and grain size. Therefore, it is of great practical significance to obtain the law of temperature field change during the cooling process of color steel coil. The calculation of specific heat capacity of color steel coil conforms to the actual cooling process, and the model of heat transfer coefficient of inner surface of color steel coil and thermal resistance between layers of color steel coil is established. The natural air cooling process of micro-alloy high strength color steel coil is simulated by Deform-2D software. The correctness of the model is verified by comparing the simulated temperature drop curve with the experimental data, and the effects of steel plate thickness and coiling temperature on the cooling temperature field of color steel coil are studied and analyzed. The results show that the larger the thickness of the steel plate, the more uneven the temperature distribution of the color steel coil, the higher the coiling temperature, the longer the transformation time of the color steel coil, but the cooling rate of each part of the color steel coil will not change accordingly.
High-strength steel plays an important role in the national economy, such as automotive components, containers and other widely used. It can meet higher performance requirements, reduce tool self-weight and energy consumption, save energy and reduce air pollution. Microalloying and controlled rolling and cooling technology are the main methods to improve the performance of steel. Coiling is the last process of controlled rolling and controlled cooling in hot strip rolling production line. Coiling temperature is also an important factor to determine the final performance of products. Generally speaking, it takes 2 to 3 days to cool the coiled steel to room temperature, and it takes time and effort to measure the temperature of the coiled steel. In addition, the inner temperature field of the color steel coil is difficult to measure because of the close contact between the layers of the color steel coil. With the rapid development of computer technology, it is the most effective method to use finite element software to simulate the temperature field change during the cooling process of color steel coil.