38CrMoAl钢由于钢中[Al]含量极高(w([Al])为0.7%～1.1%),在连铸过程中容易导致水口的堵塞,同时在传统的高SiO_2熔渣条件下,钢渣反应将导致钢水成分和熔渣性能发生较大的变化,恶化钢的洁净度.从热力学方面分析了高铝钢钢渣反应特性,得到了适合高铝钢的精炼渣和中间包保护渣成分控制目标,使钢中[Si]得到准确控制,钢的洁净度达到较高水平;同时采用高碱性高玻璃化连铸保护渣理论保让了熔渣吸收Al_2O_3夹杂后性能的稳定性.工业性试验结果表明:高铝钢铸坯平均w(T[O])＜0.0012%,w([S])＜0.003%,铸坯表面和皮下质量良好,完全满足用户要求.
High[Al]in 38CrMoAl(w[Al])of 0.7%-1.1%)is liable to cause the nozzle blockage in continuous casting process.The composition of molten steel as well as the properties of molten slag changed obviously because of the slag-steel reaction,which will worsen cleanliness of steel.Based on the analysis of slag-steel reaction characteristics by thermodynamics calculation,reasonable component and control range were analyzed for the component optimization of LF refining slag and tundish powder.In order to maintain stability of mold fluxes after absorbing Al_2O_3,high basic and high glass phase mold fluxes were used.The industrial experiment shows that the goal of w(T[O])＜0.0012%,w([S])＜0.003%,good surface and subsurface quality of blooms can be achieved.
参考文献
| [1] | WANLIN WANG;KENNETH BLAZEK;ALAN CRAMB .A Study of the Crystallization Behavior of a New Mold Flux Used in the Casting of Transformation-Induced-Plasticity Steels[J].Metallurgical and Materials Transactions, B. Process metallurgy and materials processing science,2008(1):66-74. |
| [2] | 余国松.100t EBT电弧炉-LF-CC流程生产38CrMoAl钢的工艺实践[J].特殊钢,2008(04):41-42. |
| [3] | 张鉴.冶金熔体和溶液的计算热力学[M].北京:冶金工业出版社,2007:390. |
| [4] | Hideaki SUITO;Ryo INOUE .Thermodynamics on Control of Inclusions Composition in Ultraclean Steels[J].ISIJ International,1996(5):528-536. |
| [5] | 王谦,王雨,谢兵,迟景灏.合金钢连铸结晶器保护渣的基本功能[J].特殊钢,2004(01):1-4. |
| [6] | 谢兵 .连铸结晶器保护渣相关基础理论的研究及其应用实践[D].重庆大学,2004. |
| [7] | Riboud P;Vasse R .Steel Desulfurization in Secondary Refining[J].Rev de Métallurgie-CIT,1985,82(11):801. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%