高碳工具钢SK85板坯连铸纵裂控制技术

doi:10.13228/j.boyuan.issn1005-4006.20230034

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Abstract In view of the longitudinal crack of high carbon steel tool steel SK85 produced by continuous casting in Tanggang New District, the mechanism of surface longitudinal crack of casting billet and the actual characteristics of defects were analyzed systematically, and effective measures were taken to reduce the incidence of longitudinal crack of slab SK85 steel. The main reason of surface longitudinal cracking of SK85 steel in Tangsteel New District slab continuous casting is that the superheat of molten steel, the control of mold heat flow parameters and the precision management of continuous casting machine equipment do not meet the requirements of high carbon steel characteristics. By reducing the superheat of molten steel in continuous casting to 18-26 ℃, stably controlling the range of 1.0-1.2 m/min in continuous casting drawing speed, adjusting the water flow of mold and the temperature difference between inlet and outlet water to control the heat flow of mold to 1.6-1.9 MW/m², ensuring the arc accuracy of the fan section and mold in continuous casting, and strictly controlling the surface longitudinal cracking of SK85 with immersion nozzle. The incidence of longitudinal crack is stabilized to less than 5%. The research results described in this paper have positive reference significance for the research and development and production of high carbon tool steel in similar steel plants.

Key words： high carbon steel SK85 longitudinal crack superheat heat flow equipment accuracy

Received: 10 May 2023

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20230034 OR http://www.chinamet.cn/Jweb_lz/EN/Y2023/V42/I5/39

[1]	张利民,朱立光,张彩军,等.高碳钢50-2冲压鞋包头开裂原因分析与控制[J].中国冶金,2021,31(2):44.
[2]	左小坦,陈永峰,张洪彪,等.连铸工艺参数对40Cr圆还碳偏析的影响[J].中国冶金,2020,30(6):97.
[3]	彭治强.基于高通量试验原理82B连铸坯组织形貌特征[J].钢铁,2021,56(7):86.
[4]	毛文文,路博勋,郭银涛,等.中碳高铝钢表面缺陷研究及控制[J].中国冶金,2021,31(3):111.
[5]	OCONNOR T G,DANTZIG T A. Modeling the thin slab continuous casting mold[J]. Metallurgical and Materials Transction B,1994,25(3):443.
[6]	吴晨辉,李阳,谢鑫,等.板坯连铸过程凝固传热数值计算与工艺优化[J].中国治金,2022,32(3):92.
[7]	杨立安,米进周,李涛,等.连铸板坯表面纵裂纹预测模型智能化定制方法[J].连铸,2022(6):16.
[8]	史伟宁.连铸结晶器水量对40Cr钢方坯表面裂纹的影响[J].连铸,2023(2):84.
[9]	蔡开科.连铸坯质量控制[M].北京:冶金工业出版社,2010.
[10]	王万林,颜雄,周乐君,等.高碳钢连铸保护渣的性能[J].连铸,2021(6):48.
[11]	陈明昕.连铸板坯表面纵裂纹的形成原因及控制[J].连铸,2020(2):41.
[12]	李长春.板坯表面纵裂成因分析及预防措施[J].连铸,2018(1):69.
[13]	文鹏.连铸板坯表面纵裂成因及控制措施[J].连铸,2013(2):21.
[14]	王克玉.连铸板坯表面纵裂原因分析及对策[J].连铸,2006(1):17.
[15]	董鹏莉,尚海霞,王华,等.铸坯及板卷典型质量缺陷成因与控制技术[J].中国冶金,2017,27(6):7.
[16]	马忠伟,吴夜明,黄拓,等.板坯连铸结晶器内坯壳断裂机理及裂纹扩展特征研究响[J].炼钢,2014,30(4):47.
[17]	巨建涛.板坯表面纵裂的成因分及控制措施[J].铸造技术,2007,28(8):1126.
[18]	赵磊.连铸坯表面纵裂纹浅析[J].连铸,2015(4):69.
[19]	任迅.连铸坯纵裂的成因与对策[J].连铸,2002(3):17.
[20]	王海达,陈列,董贵文,等.低碳钢矩形大方坯表面横裂纹的影响因素及控制[J].特钢技术,2022,4(28):30.
[21]	高仲,张兴中.薄板坯表面纵裂研究进展[J].中国冶金,2007,17(12):4.