对（900～2150）mm×230/250mm板坯连铸机生产510L板坯产生表面纵裂的试样进行了分析,针对纵裂可能产生的原因,对生产工艺进行了优化。包括控制钢水含碳质量分数在0.08%以下,降低一冷水量15%,提高结晶器进水温度在38℃以上,降低二冷水总水量25%,同时分回路降低水量9.9%～36.2%,采用高碱度、高熔点、低黏度保护渣等措施。使该钢种的纵裂发生率从前期的57.41%降低到了现阶段的2.15%,有效地提高了铸坯一次检验合格率。
The sample cut from the longitude crack of 510L grade beam slab was analyzed in order to find out the causes of longitude crack.Then some technique parameters were optimized correspondingly,such as the carbon content was controlled under 0.08%,the mold water was decreased about 15%,the temperature of inlet water was improved upon 38 ℃,the secondary cooling water was decreased about 25%,the mold powder having high basicity,high melt point and low viscosity was used.Taking all of these measurements above,the longitude crack ratio was decreased from 57.41% to 2.15%.
参考文献
| [1] | Lankford W T .Some Considerations of Strength and Ductility in the Continuous Casting Process[J].Metallurgical and Materials Transactions,1972,3(04):1331. |
| [2] | 洪兵雄,毛新平,柴毅忠,朱伯平.CSP薄板坯表面纵裂原因及防止措施[J].钢铁钒钛,2004(02):57-61. |
| [3] | K.Kim H.N.Han .Analysis of surface and internal cracks in continuously cast beam blank[J].Ironmaking & Steelmaking: Products and applications,1997(3):249-255. |
| [4] | 郭世宝,王广林,梁世勇,董光欣.安钢板坯纵裂纹原因分析及控制措施[J].炼钢,2005(05):24-28. |
| [5] | 职建军.连铸板坯纵裂原因浅析[J].钢铁,2000(10):30-32. |
| [6] | J. A. Kromhout;V. Ludlow;S. McKay .Physical properties of mould powders for slab casting[J].Ironmaking & Steelmaking: Products and applications,2002(3):191-193. |
| [7] | A. Yamauchi;K. Sorimachi;I. Yamauchi .Effect of solidus temperature and Crystalline phase of mould flux on heat transfer in continuous Casting mould[J].Ironmaking & Steelmaking: Products and applications,2002(3):203-207. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%