Annealing of cold-rolled high-strength steels leads to various microstructural changes such as recrystallization, cementite precipitation, microalloying elements precipitation and austenite formation. These transformations are expected to interact with each other. Understanding how and where austenite forms in a microstructure is of prime importance to avoid formation of banded microstructures, which are detrimental to good in-use properties. In this work, a mean-field model is used to simulate concomitant recrystallization, cementite precipitation, microalloying elements precipitation and austenite formation kinetics, as well as their interactions during 1 and 10 °C/s heating. Excellent agreement with experimental data is obtained only if cementite pinning effect on recrystallized grain boundaries is considered. It is shown that cementite exhibits a much stronger delaying effect on recrystallization kinetics than microalloying elements, leading to the formation of banded microstructures. Carbon nominal content of a steel appears to be the most important parameter to acknowledge to understand recrystallization kinetics.

冷轧高强度钢的退火会导致各种微观组织变化，例如重结晶，渗碳体沉淀，微合金元素沉淀和奥氏体形成。这些转换有望彼此交互。了解奥氏体在微观结构中的形成方式和位置对于避免形成带状的微观结构至关重要，因为这种条状的微观结构不利于良好的使用性能。在这项工作中，均场模型用于模拟伴随的重结晶，渗碳体沉淀，微合金元素沉淀和奥氏体形成动力学，以及它们在1和10°C / s加热期间的相互作用。仅考虑渗碳体钉扎对再结晶晶界的影响，才能获得与实验数据的极佳一致性。结果表明，渗碳体对再结晶动力学的延迟作用比微合金元素强得多，从而导致形成带状微结构。钢的碳标称含量似乎是承认了解重结晶动力学的最重要参数。