利用金相、扫描电镜等对J55边部裂纹进行了观察，并对边部裂纹的产生原因进行了分析，研究表明：连铸坯表面的角横裂纹是热轧板卷边部裂纹产生的主要根源，连铸坯角部过冷导致奥氏体晶界细小的A1N、Nb（N，C）析出，加剧了连铸坯对裂纹的敏感性，连铸坯经过轧制后，连铸坯表面的角横裂纹扩展成为热轧板卷的边部裂纹。
The edge crack was investigated through optical microscope and SEM, and the reasons of edge crack were analyzed. Results show that transversal corner cracks of slabs are the origin of the edge cracks of hot rolled strips, and A1N, Nb(N, C) precipitates around the prior austenite grain boundaries due to intensive cooling rate rendered the slabs more susceptible to cracks. After rolling stands, the transverse cracks of the slabs will propagate to serrated edge cracks.
参考文献
| [1] | 赵长亮,孙彦辉,田志红,蔡开科,刘建华,成小军,吴光亮,周春泉.CSP热轧板卷边部裂纹成因[J].北京科技大学学报,2007(05):499-503. |
| [2] | 刘洋;韦耀环;马瑞金.连铸坯角部横裂纹在轧后钢板边部演化研究[A].广东珠海,2011 |
| [3] | 关春立,韩立海,唐海明.集装箱板SPA-H边部缺陷的机制研究及控制实践[J].钢铁,2011(07):36-40. |
| [4] | 陈家祥.炼钢常用图表数据手册[M].北京:冶金工业出版社,1984 |
| [5] | 孙彦辉,赵长亮,孟征兵,蔡开科,成小军,吴光亮,周春泉.CSP工艺生产热轧板卷边裂的分析和控制[J].特殊钢,2006(04):47-49. |
| [6] | 王新华;昌波;李景捷 等.700-1000℃间含Nb钢铸坯的延塑性降低与Nb(C,N)析出[J].金属学报,1997,33(05):485. |
| [7] | 刘光明,李洪泉,李大明.含铌钢铸坯横裂纹的分析及改进措施[J].炼钢,2006(01):37-39. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%