摘要
平整是冷轧带钢生产的重要工序,其可以消除带钢的屈服平台,提高其成形性能和质量。但平整液可诱发冷轧带钢表面黄斑缺陷的产生。采用扫描电镜和电化学分析手段,分析了冷轧带钢表面黄斑缺陷特征及其形成机制。结果表明：冷轧带钢表面平整黄斑缺陷的主要成分为铁氧化物,其产生过程与冷轧带钢表面电位和裂开的氧化膜电位差值有关。在平整液作用下,冷轧带钢表面氧化膜破损处可形成新的氧化膜,其生成速度越快,越有利于降低平整黄斑缺陷的发生率。平整液中添加剂磷酸盐和钼酸盐可以提高冷轧带钢表面氧化膜的生成速度,从而避免黄斑缺陷的产生。
Temper was an important process in the production of cold rolled strip,the yielding point elongation of strip could be eliminated and the formability and quality of strip could be improved.However,the yellow spot defect on the cold rolled strip surface could be induced by the temper solution.The characteristics and formation mechanism of the defects on cold rolled strip surface were studied by means of SEM and electrochemistry methods.The results show that the main component of yellow spot defects on the cold rolled strip surface is iron oxide,which is related to the potential difference between the cold rolled strip surface and cracked oxide film.The new oxide film formation on the cold rolled strip surface with the cracked oxide film can be reduced by the temper solution.The generated speed of oxide film is conducive to reduce the incidence of yellow spot defects.The addition of phosphate and molybdate can improve the generated speed of oxide film on the cold rolled plate surface.
作者
陈红星
李建中
刘常升
CHEN Hong-xing1,3 , LI Jian-zhong2, LIU Chang sheng1(1. School of Materials Science and Engineering; 3. School of Metallurgy, Northeastern University, Shenyang 110819, China; 2. Baoshan Iron and Steel Co. , Ltd. , Shanghai 201900, Chin)
出处
《轧钢》
2018年第2期29-32,74,共5页
Steel Rolling
基金
国家自然科学基金资助项目(51374053
U1760118)
关键词
平整
冷轧
黄斑缺陷
机理
氧化膜
temper
cold rolling
yellow spot defect
mechanism
oxide film
