热轧卷取温度是影响热轧组织的主要因素,热轧后所获得的组织,决定着低碳冷轧薄板的性能。为减少P3A2钢冷轧退火产品在平整过程中的横折线缺陷,通过降低热轧卷取温度,可提高屈服强度,同时抑制AlN在热轧过程中的析出,使其在退火过程中析出,减少固溶氮的含量,增加带钢屈服的难度,减少了开卷过程中的横折线缺陷。 Hot coiling temperature is the main factor affecting hot-rolled microstructure. The structure obtained after hot-rolling determines the performance of low-carbon cold-rolled sheet. In order to reduce the horizontal fracture line defects during the smoothing process of the P3A2 steel cold rolled annealed product, the yield strength can be increased and the precipitation of AlN during the hot rolling process can be suppressed by reducing the coiling temperature during hot rolling so as to precipitate and reduce during the annealing process The content of nitrogen in solid solution increases the difficulty of yielding of the strip and reduces the transverse folding line defects in the uncoiling process.