ABSTRACT

In order to study the precipitation behaviour of phosphorus-containing precipitates in the rolling and cooling process of phosphorus-containing high-strength interstitial free steels, and to solve the problem of the tensile-straightening broken belt in the actual production process, the GLEEBLE-3500 thermal simulator was used to simulate the rough rolling, finishing and laminar cooling processes, in which different cooling speeds were used to simulate the laminar cooling process, and the transmission electron microscope was used to study the microstructure of steel and the precipitation behaviour of phosphorus. Studies have shown that as the cooling rate increases, the size and quantity of phosphorus-containing precipitates at the grain boundaries gradually decrease, and the content of phosphorus in the precipitates decreases significantly.

摘要

为了研究含磷高强无间隙钢轧制和冷却过程中含磷析出物的析出行为，解决实际生产过程中拉矫断带问题，GLEEBLE-采用3500热模拟器模拟粗轧、精轧和层流冷却过程，其中采用不同冷却速度模拟层流冷却过程，利用透射电子显微镜研究钢的显微组织和磷的析出行为. 研究表明，随着冷却速度的增加，晶界含磷析出物的尺寸和数量逐渐减少，析出物中磷的含量显着降低。