锻压技术

热连轧碳钢表面边部黑线缺陷分析与改进

英文标题：Analysis and improvement of black line defects on surface edge of hot continuous rolling carbon steel

作者：肖娟1 巫佩凤2 廖耀俊1

单位：1.广西柳州钢铁集团有限公司科技质量中心 2. 广西柳州钢铁集团有限公司制造管理部

分类号：TG113

出版年,卷(期):页码：2024,49(6):155-160

摘要：

根据表面黑线缺陷的宏观分布和微观截面与表面光学特征，结合轧制生产线工艺与装备的跟踪与分析，明确了热连轧碳钢表面边部黑线缺陷的产生原因和形成机理。结果表明，表面边部黑线缺陷的产生与粗轧时边部金属的塑性变形有关，立辊表面质量差会促进或加重边部黑线。相对于倒角坯，直角坯的边部增厚多且温降大，更易形成黑线缺陷。通过采取优化轧制模式、缩短立辊使用周期和投入倒角坯等改进措施后，热连轧碳钢表面黑线偶有出现，且在距边部10 mm范围内，热卷边部的黑线缺陷得到了有效消除。

According to the macroscopic distribution of black line defects at surface, and the optical characteristics of microscopic cross-section and surface, combined with the tracking and analysis on the process and equipment of rolling production line, the cause and formation mechanism of black line defects on surface edge of hot continuous rolling carbon steel were determined. The results show that the occurrence of black line defects on the surface edge is related to the plastic deformation of metal on the edge during rough rolling, and the poor surface quality of vertical roller will promote or aggravate the black line on the edge. Compared with chamfered billet, the edge of right-angle billet is easy to form black line defects because of the large thickening of its edge and the large temperature drop. After the improvement measures such as optimizing the rolling mode, shortening the service period of vertical roller and putting in chamfered billet, the black line occasionally appears at surface for hot continuous rolling carbon steel and is within 10 mm from the edge, the black line defects on the hot rolled edge can be effectively eliminated.

基金项目：

广西重大专项（桂科AA22068081）

作者简介：肖娟（1986-），女，硕士，高级工程师,E-mail：xiaojuangz@163.com

参考文献：

[1]刘晓军,廖正俊. 带钢黑线产生的主要原因及解决措施[A]. 2017高效、低成本、智能化炼钢共性技术研讨会论文集[C].潍坊，2017.

Liu X J, Liao Z J. Main causes and solutions of strip black wire[A]. Proceedings of the 2017 Symposium on Common Technology of High Efficiency, Low Cost and Intelligent Steelmaking[C].Weifang，2017.

[2]张晓蒙,张铭志.热轧低碳钢表面黑线起皮缺陷形成原因分析[J].冶金工程,2022,9(4):289-294.

Zhang X M, Zhang M Z. Analysis on the causes of black line peeling defects on the surface of hot rolled low carbon steel[J]. Metallurgical Engineering,2022,9(4):289-294.

[3]赵烁,李祖树,朱雨逸,等. 低碳热轧板卷的表面黑线和翘皮缺陷形成机制[J].中国冶金,2021,31(4):37-43.

Zhao S, Li Z S, Zhu Y Y，et al. Mechanism analysis of surface black line and upwarping defects on low carbon hot-rolled plate[J]. China Metallurgy，2021,31(4):37-43.

[4]袁伟,李传,钱震茂,等. SPHC原卷边部黑线缺陷的分析与改善[J]. 轧钢,2015,32(5):66-70.

Yuan W, Li C, Qian Z M，et al. Analysis and improvement for the edge black line defect on SPHC coil[J].Steel Rolling，2015,32(5):66-70.

[5]王晓南,邸洪双,梁冰洁,等. 热连轧粗轧调宽轧制过程边角部金属流动三维数值模拟[J].物理学报,2009,58(Z1):84-88.

Wang X N, Di H S, Liang B J，et al.Three-dimensional numerical simulation of the edger and corner metal′s flow on edging rolling on roughing of hot continuous rolling process[J]. Acta Physica Sinica，2009,58(Z1):84-88.

[6]李秀,陈思,余轶峰,等. 板坯倒角结晶器技术的应用[J]. 冶金信息导刊,2020,57(2):34-39,46.

Li X, Chen S, Yu Y F，et al. Application of slab chamfered mold technology[J]. Metallurgical Information Review，2020,57(2):34-39,46.

[7]刘建潮,胡恒法. SPHC热轧板卷边部黑线成因分析[J]. 轧钢,2008,25(5):13-15.

Liu J C, Hu H F. Analysis on the mechanism of edge black line defect on the SPHC hot rolled strip[J].Steel Rolling,2008,25(5):13-15.

[8]褚俊威,孙明军,邱增帅.热轧IF钢汽车原板质量问题分析及关键技术研究[J].轧钢,2015,32(2):18-21.

Chu J W, Sun M J, Qiu Z S. Analysis on quality problems about hot rolled IF steel sheet and research on the key technologies[J].Steel Rolling,2015,32(2):18-21.

[9]赵洁,邹德宁,陈兴润,等. 经济型双相不锈钢热轧板表面起皮缺陷成因及唯象模型[J]. 塑性工程学报,2020,27(11):77-84.

Zhao J, Zou D N, Chen X R，et al. Cause and phenomenological model of surface peeling defects of economical duplex stainless steel hot rolled plate[J]. Journal of Plasticity Engineering，2020,27(11):77-84.

[10]章传国,韩静涛,刘靖,等. 立辊调宽热粗轧过程三维有限元模拟[J]. 塑性工程学报,2006,13(1):74-77.

Zhang C G, Han J T, Liu J，et al. Three-dimensional finite-element method simulation of hot rough rolling[J]. Journal of Plasticity Engineering，2006,13(1):74-77.

[11]夏小明,邸洪双,高映. 热轧带钢边部黑线产生机理[J]. 钢铁研究学报,2010,22(6):18-20,25.

Xia X M, Di H S, Gao Y. Creation mechanism of edge black line on hot strip[J]. Journal of Iron and Steel Research,2010,22(6):18-20,25.

[12]武彩虹,韩静涛,刘靖,等. 热轧带钢边部“翘皮”缺陷分析[J]. 塑性工程学报,2005,12(6):23-25.

Wu C H，Han J T，Liu J，et al. Analysis on the edge surface upwarping of hot rolled strip[J]. Journal of Plasticity Engineering,2005,12(6):23-25.

[13]宋越,崔雪飞,于洋，等.Ti-6Cr-5V-5Mo-4Al-1Nb合金的晶粒长大动力学[J].稀有金属,2023,47(6):908-914.

Song Y，Cui X F，Yu Y，et al. Grain growth kinetics of Ti-6Cr-5V-5Mo-4Al-1Nb alloy[J]. Chinese Journal of Rare Metals，2023,47(6):908-914.

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