加磷高强Ti-IF钢的最优卷取温度和冷轧压下率的确定

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...

Determination of Optimal Coiling Temperature and Cold Reduction Ratio of Adding Phosphorus High Strength Ti-IF Steel

Hot rolled adding phosphorus high strength Ti-IF steel sheet was used to study the effect of coiling temperature and cold reduction ratio on the microstructures, mechanical properties and textures of experimental steel. The experimental results showed that the recrystallization had finished after cold rolling followed diffrenent cold reduction ratio and coiling temperature was from 550 ~C to 600 ~C under experimental condition. When the cold reduction ratio was increased, the grain changed fine and uniformity under diffrenent coiling temperature. The yield strength, tensile strength and elongation percentage were approximate 160 MPa, 345 MPa and 35. 0 % respectively, under coiling temperature 600 ℃ and diffrenent cold reduction ratio condition, the plastic strain ratio r value and the strain hardening exponent n value were reached the maximum, respectively, the r value was approximate 1.5, the n value was approximate 0.30. When the coiling temperature was increased, the {111} （110） texture of a skeleton lines was stronger. Therefore, the suggested the optimal coiling temperature was 600 ℃, cold reduction ratio was 60% to 70%, and it obtained optimally match of high strength and punching property.