Abstract: The effect of original finish rolling process [finish rolling at ≥930℃. and wire coiling at (870 土 10) ℃] and improved finish rolling process [finish rolling at ≥950 ℃and wire coiling at (900 ± 10) ℃] for φ5.5 mm 0.73% C 72A tire cord steel coil on its structure, texture and mechanical properties has been studied by using scanning electron microscope (SEM), X-ray diffractometer (XRD) and tensile testing machine. Results show that with increasing finish rolling and wire coiling temperature respectively by 20 °C and 30 ℃, the distance between pearlite lamellae in steel decreases from 144 nm to 133 nm, the tensile strength and plasticity of steel increase slightly, while the intensity of {111} texture along the axis of wire rod decreases and the peeling rate of oxide scale increases from 1. 66 kg/t to 2. 67 kg/t, that are favorable to increase the drawability of tire cord steel.

摘要： 采用扫描电子显微镜(SEM), X-射线衍射仪(XRD)、拉伸试验机等研究了φ5.5 mm 0.73%C 72A帘线钢盘条原精轧工艺[精轧≥930℃,吐丝(870±10) ℃]和改进工艺[精轧≥950℃,吐丝(900±10) ℃]对其组织、织构和力学性能的影响。结果表明,精轧和吐丝温度分别提高20℃和30℃后,该钢珠光体片层间距由144 nm降至133 nm,抗拉强度和塑性略有增加,而盘条轴向{111}织构强度下降,氧化皮剥落率由1.66 kg/t提高到2.67kg/t,有利于提高帘线钢的拉拔性能。