【摘要】 用扫描电镜和弯曲试验研究了吐丝温度和斯太尔摩风冷线Ⅰ～Ⅲ段冷却速度对72A钢盘条（/%:0.70～0.75C,0.15～0.35Si,0.35～0.60Mn,≤0.025P,≤0.025S）氧化铁皮层厚、组成结构和剥离性的影响。结果表明,氧化铁皮的剥离性主要与铁皮厚度有关,10～20μm厚的氧化铁皮具有较好的机械剥离性。FeO层与氧化铁皮的剥离性呈正相关关系,FeO层达到9μm以上具有较好的剥离性,Fe₃O₄层与氧化铁皮剥离性呈负相关关系;FeO层厚比随冷却速度的提高而增加,当吐丝温度到910℃,提高斯太尔摩风冷线各段冷却速度,Ⅰ段为6～7.5℃/s,Ⅱ段为12～20℃/s,高碳钢盘条的机械剥离性得到了有效改善。更多还原

【Abstract】 The effect of wire finished rolling temperature and cooling rate at Ⅰ～Ⅲ section of Stelmor cooling line on thickness of oxide scale, ingredient and structure and flaking properties of coil of steel 72 A（/%: 0. 70 ～0.75 C,0. 15 ～0. 35 Si, 0. 35 ～0. 60 Mn, ≤0. 025 P, ≤0. 025 S） has been studied by SEM and bending test. Results show that the descaling performance of oxide scale is mainly associated with thickness of scale, and the scale with thickness 10 ～ 12 μm has better mechanical-descaling performance; the thickness of FeO layer is positively correlated with the descaling performance of scale, and the scale with thickness more than 9 μm has better descaling performance, while the Fe₃O₄,layer is negatively correlated with the descaling performance of scale; with increasing cooling rate the thickness ratio of FeO layer increases,with outlet wire temperature up to 910℃, increasing cooling rate of coil at Stelmor cooling line i.e. 6～7.5 ℃/s at I section and 12 ～20 ℃/s at Ⅱ section the mechanical-descaling performance of high carbon steel coil is effectively improved.更多还原