以工业生产的加磷高强 Ti-IF钢为试验材料,在实验室研究了卷取温度和冷轧压下率对试验钢显微组织、力学性能和织构的影响。结果表明:在试验条件下,试验钢在不同冷轧压下率下,卷取温度在550~600℃时,再结晶完成;不同卷取温度下,随着冷轧压下率的增加,晶粒变得细小均匀;卷取温度在600℃时,不同冷轧压下率下的屈服强度、抗拉强度和伸长率分别在160 MPa,345MPa和35.0%左右,塑性应变比r值和应变硬化指数n 值均较高,r值为1.5左右,n 值为0.30左右;随着卷取温度的提高,{111}<110>织构密度逐渐增强。最终提出工业生产中卷取温度为600℃,冷轧压下率为60%~70%,可以获得高强度和优良的成型性能。

Hot rolled adding phosphorus high strength Ti-IF steel sheet was used to study the effect of coilingtemperature and cold reduction ratio on the microstructures,mechanical properties and textures of experimentalsteel.The experimental results showed that the recrystallization had finished after cold rolling followed diffrenentcold reduction ratio and coiling temperature was from 550℃to 600℃under experimental condition.When the coldreduction ratio was increased,the grain changed fine and uniformity under diffrenent coiling temperature.The yieldstrength,tensile strength and elongation percentage were approximate 160MPa,345MPa and 35.0%respectively,under coiling temperature 600℃and diffrenent cold reduction ratio condition,the plastic strain ratio r value and thestrain hardening exponent nvalue were reached the maximum,respectively,the r value was approximate 1.5,the nvalue was approximate 0.30.When the coiling temperature was increased,the{111}<110>texture ofαskeletonlines was stronger.Therefore,the suggested the optimal coiling temperature was 600 ℃,cold reduction ratio was60%to 70%,and it obtained optimally match of high strength and punching property.