22SiMn2TiB钢250 mm连铸坯氧化铁皮分析及工艺改进

特殊钢 ›› 2018, Vol. 39 ›› Issue (4): 31-34.

22SiMn2TiB钢250 mm连铸坯氧化铁皮分析及工艺改进

陈本文^1,2, 张坤³, 苏春霞^1,2, 赵刚^1,2, 杨晰^1,2, 付超^1,2

1海洋装备用金属材料及其应用国家重点实验室，鞍山114009；
2鞍钢股份技术中心，鞍山114009；
3鞍钢股份皺鱼圈分公司厚板部，营口 115007

收稿日期:2018-02-08 出版日期:2018-08-01 发布日期:2022-05-31
作者简介:陈本文(1977-),男，硕士(2010年辽宁科技大字)，高级工程师,2001年辽宁工学院(本科)毕业,炼钢和热处理工艺研究。

Analysis on Oxide Scale of 250 mm Continuous Casting Slab in 22SiMn2TiB Steel and Process Improvement

Chen Benwen^1,2, Zhang Kun³, Su Chunxia^1,2, Zhao Gang^1,2, Yang Xi^1,2 , Fu Chao^1,2

1 State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114009;
2 Angang Steel Company Limited Technology Centre, Anshan 114009 ；
3 Bayuquan Heavy Plate Mill of AnSteel, Yingkou 115007

Received:2018-02-08 Published:2018-08-01 Online:2022-05-31

摘要/Abstract

摘要： 采用扫描电镜、EDX能谱仪和X射线衍射仪对22SiMn2TiB钢连铸坯的氧化铁皮除不净的原因进行分析。结果表明,在现行加热工艺条件下容易使钢中Si（0.70%～1.00%）氧化,并在连铸坯氧化铁皮中形成Fe₂SiO₄（铁橄榄石）,经高压水除鳞冷却后Fe₂SiO₄形成类似锚状形貌,将FeO层钉扎住,增加了与基体的附着力,致使氧化铁皮很难完全被除掉。通过优化加热工艺,控制连铸坯加热出炉温度为1 250～1 300℃,可使连铸坯经除鳞点后温度控制在1 173℃以上,减小氧化铁皮与基体的结合力,可有效的解决22SiMn2TiB钢连铸坯除鳞不净的问题。

Abstract: The reason of oxide scale of continuous casting slab in 22SiMn2TiB steel cannot be completely removed was analyzed by SEM, EDX and XRD. The results show that silicon element (0.70% 〜1. 00 %) of 22SiMn2TiB steel is easy oxidation ,and form the phase of Fe₂SiO₄ (fayalite ) under the condition of primary heating process. The form of Fe₂SiO₄ (fayalite) will be changed after high-pressure water descaling, like anchor, FeO will be packed by it, leading to the increment of adhesion force between inner layer oxide scale and steel matrix, which is the reason for the incompletely removed of oxide scale of continuous casting slab. According to the analysis results, we have optimized heating process of continuous casting slab, the temperature of continuous casting slab was elevated 1 250 ~ 1 300℃, thus, the temperature of continuous casting slab was controlled above 1 173 ℃ after high-pressure water descaling, leading to the decrease of adhesion force between inner layer oxide scale and steel matrix, the question of incompletely descaling of continuous casting slab in steel 22SiMn2TiB will be effectively resolved.

陈本文, 张坤, 苏春霞, 赵刚, 杨晰, 付超. 22SiMn2TiB钢250 mm连铸坯氧化铁皮分析及工艺改进[J]. 特殊钢, 2018, 39(4): 31-34.

Chen Benwen, Zhang Kun, Su Chunxia, Zhao Gang, Yang Xi, Fu Chao. Analysis on Oxide Scale of 250 mm Continuous Casting Slab in 22SiMn2TiB Steel and Process Improvement[J]. Special Steel, 2018, 39(4): 31-34.