在冷轧带钢的生产中,平整工序是性能、尺寸、表面和板形的重要控制手段。本文分析了平整延伸率变化对IF钢退火后力学性能和组织的影响,并得出了相应的拟合公式。结果表明:屈服强度和抗拉强度随平整延伸率的提高而提高;伸长率与平整延伸率变化无对应关系;平整延伸率对应变硬化指数n值没有影响;随平整延伸率增大,晶粒被拉长,晶界和晶粒内部没有破坏。 In the production of cold-rolled strip, the formation process is an important control means of performance, size, surface and plate shape. This paper analyzes the influence of the change of the flattening elongation on the mechanical properties and the microstructure of the IF steel after annealing, and obtains the corresponding fitting formula. The results show that the yield strength and the tensile strength increase with the increase of the flattening elongation. There is no correlation between the elongation and the change of the flat elongation. The flattening elongation has no effect on the value of the strain hardening index (n). With the flattening elongation increasing, The grains are elongated, leaving no damage to grain boundaries and grains.