东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (7): 948-951.DOI: -

• 材料与冶金 • 上一篇    下一篇

氧化铁皮在冷轧过程中的断裂行为

何永全1，贾涛1，刘振宇1，李俊1,2   

  1. (1.东北大学轧制技术及连轧自动化国家重点实验室，辽宁沈阳110819；2.宝钢研究院，上海201900)
  • 收稿日期:2013-01-23 修回日期:2013-01-23 出版日期:2013-07-15 发布日期:2013-12-31
  • 通讯作者: 何永全
  • 作者简介:何永全(1985-)，男，河南洛阳人，东北大学博士研究生；刘振宇(1967-)，男，内蒙古赤峰人，东北大学教授，博士生导师；李俊(1965-)，男，江西赣州人，宝钢教授级高级工程师，东北大学兼职教授，博士生导师.
  • 基金资助:
    “十二五”国家科技支撑计划项目(2011BAE13B04).

Fracture Behavior of Surface Oxide Scale in Cold Rolling

HE Yongquan1， JIA Tao1， LIU Zhenyu1， LI Jun1,2   

  1. 1. State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China; 2. Baosteel Research Institute， Shanghai 201900， China.
  • Received:2013-01-23 Revised:2013-01-23 Online:2013-07-15 Published:2013-12-31
  • Contact: HE Yongquan
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摘要： 利用轧卡实验研究热轧低碳钢表面氧化铁皮在无酸洗冷轧过程中的断裂行为.结果表明，由于带钢在靠近辊缝处的弹性变形，带钢表面的氧化铁皮受拉应力作用发生断裂，裂纹垂直于轧制方向，越靠近辊缝裂纹密度越大.单道次轧制压下量小于16%时，氧化铁皮只发生断裂；压下量超过16%时，氧化铁皮开始出现脱落，当氧化铁皮受力超过其界面附着强度时，将发生氧化铁皮从带钢表面剥离和粉碎.同样的总压下量条件下，多轧制道次有利于保护氧化铁皮的完整性.

关键词: 氧化铁皮, 免酸洗, 冷轧, 断裂行为, 低碳钢

Abstract: The fracture of oxide scale on the hotrolled low carbon steel strip in cold rolling without pickling was investigated. It is found that microcracks were formed in the oxide scale near the entry to the roll bite due to the elastic deformation of the steel strip near the gap of the rolls， running perpendicular to the rolling direction. Density of cracks increased with the distance closer to the bite entry. The oxide scale was cracked only with the reduction of single pass lower than 16%， while the reduction of single pass was higher than 16%， the oxide scale began to spall. When the interface shear stress was beyond the adhesive strength between the oxide scale and the steel surface， spalling and powdering of the oxide scale from the surface of the steel strips will occur. Under the same total reduction condition， the multipass rolling is favor to protect the integrality of the oxide scale.

Key words: oxide scale, without pickling, cold rolling, fracture behavior, low carbon steels

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