针对南钢部分合金结构钢棒材存在的硬度偏硬、影响锯切的问题，详细分析了硬度超标的影响因素，利用Gleeble热模拟试验研究了终轧温度对成品硬度的影响，采用合理调整钢材化学成分及电磁搅拌参数，控制自由氮含量，降低终轧温度，提高入坑温度等措施，将合金结构钢硬度降低到HB240以下，降低了碳成分偏析，碳质量分数极差由0.08％降低到0.04％，从而较大程度上改善了南钢合金结构钢切割加工性能。
Since constructional alloy steel bar of Nanjing Steel Group is difficult to be cut for downstream customers, various factors for inducing high hardness are analyzed. Gleeble experiment is conducted to study the effect of finish rolling temperature on the hardness of rolled bar. The hardness was reduced successfully below HB240 and segrega- tion extent was also decreased by adjusting the chemical composition and electromagnetism agitation parameter. By controlling the free nitrogen content, the finish rolling temperature was reduced and the temperature of entering the burial pit was increased. The cutting performance was greatly improved and the extreme difference of carbon content was decreased from 0.08%to 0.04%
参考文献
| [1] | 诸葛铭毅,刘雅政.S48和S53棒材硬度与轧制工艺参数关系的研究[J].河北冶金,2006(01):21-24. |
| [2] | 杨吉春,蔡开科,郭殿锋,孟志泉.跨结晶器电磁搅拌器对重轨钢大方坯中心偏析的改善[J].钢铁,2003(12):16-19. |
| [3] | 吴夜明,姚留枋.电磁搅拌对铸坯化学成分偏析影响机理[J].特殊钢,1999(03):13-16. |
| [4] | 吴小林,王福明,黄晓星,李英,祝宜明.结晶器电磁搅拌对中碳钢成分偏析的影响[J].炼钢,2005(05):21-23,36. |
| [5] | 牧 正志.细化钢铁材料晶粒的原理与方法[J].热处理,2006(01):1-9,14. |
| [6] | 蔺永诚,陈明松,钟掘.42CrMo钢亚动态再结晶行为研究[J].材料热处理学报,2009(02):71-75. |
| [7] | 刘战英;冯运莉;田薇.连轧棒材低温轧制棒材工艺的优化与实践[A].北京:中国金属学会,2003:4. |
| [8] | 完卫国,李祥才.棒线材低温轧制技术发展[J].中国冶金,2005(01):11-16. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%