斯太尔摩工艺参数对72A钢盘条氧化铁皮剥离性能的影响  

Effect of Stelmor Process Parameters on Flaking Properties of Oxide Scale of Steel 72A Coil

作　　者：彭玉 任勇[1] 程晓茹[1] 范敬国[2] 沈金龙[2] Peng Yu;Ren Yong;Cheng Xiaoru;Fan Jinguo;Shen Jinlong(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081;Manufacture Division, Wuhan Iron and Steel Co Ltd, Wuhan 430083)

机构地区：[1]武汉科技大学钢铁冶金资源利用省部共建教育部重点实验室,武汉430081 [2]武汉钢铁股份有限公司制造部,武汉430083

出　　处：《特殊钢》2018年第3期20-24,共5页Special Steel

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,Fe_3O_4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。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 72A （/% ： 0. 70 ～0.75C, 0. 15 ～ 0. 35Si, 0. 35 ～0.60Mn, ≤0. 025P, ≤0. 025S） 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.

关 键 词：高碳钢72A 盘条 氧化铁皮 机械剥离性 控制冷却工艺 

分 类 号：TG335[金属学及工艺—金属压力加工]