主要对Q235B热轧卷板出现边部裂纹的原因以及裂纹形成过程进行了研究。通过成分分析、宏观裂纹检验、光学显微镜下的裂纹组织以及扫描电镜和能谱的分析,对Q235B热轧卷板出现边部裂纹的原因进行了分析,并对裂纹形成过程进行了数值模拟。结果表明：导致裂纹形成的主要原因是钢坯中存在低熔点夹杂物及夹渣,其在轧制过程中没有被轧合,形成裂纹。通过对夹杂物和硫含量的控制及铸坯的均热模式的改进,可减少或避免裂纹的产生。
The causes and formation process of cracks in the edge of Q235B hot-rolled steel plate are studied.The reason of crack in the edge of Q235B hot-rolled steel plate is analyzed by composition analysis,macroscopic crack inspection,optical microscope of the crack organization,scanning electron microscopy and energy spectrum.And the formation process of crack is numerical simulated.The result shows that the main cause of crack formation is low melting point and slag inclusions existing in the hot rolled steel plates have not been stitched in the rolling process,so the crack is formed.Through controlling of the inclusion and S content and improvement of the equal heating mode of casting blank,the crack can be reduced or avoided.
参考文献
| [1] | 邸洪双,王晓南,宁忠良.热轧板带边部缺陷形成机理及研究现状[J].河南冶金,2008(03):1-4,27. |
| [2] | Esa Ervasti;Ulf Stahlberg .Behaviour of longitudinal surface cracks in the hot rolling of steel slabs[J].Journal of Materials Processing Technology,1999(2/3):141-150. |
| [3] | Ko D C;Lee S H;Kim D H.Design of Sizing Press An-vil for Decrease of Defect in Hot Strip[J].Journal of MaterialsProcessing Technology,2007:187. |
| [4] | 王永胜,成泽伟,李宏,王新华,王万军.热轧板坯表面缺陷分析[J].钢铁研究学报,2002(02):75-76. |
| [5] | 成泽伟,王永胜,阮强,成东全.Q235B和Q345B钢CSP铸坯纵裂纹的控制实践[J].特殊钢,2010(03):24-26. |
| [6] | 张虎飞,田凤纪,陈剑波,余作朋,赵艳,孙建勇.Q235B钢板坯表面纵裂纹的原因分析[J].河北冶金,2009(04):53-54. |
| [7] | 韩斌,佘广夫,焦景民,张中平,刘相华,王国栋.热轧板带钢冷却过程中热力耦合计算及变形分析[J].钢铁,2005(04):39-42,56. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%