430铁素体不锈钢钢卷工艺和性能分析

刘洪涛^1,2, 吴春京¹, 任学平¹, 李殊霞¹

(1.北京科技大学 材料科学与工程学院, 100083 北京; 2.太原钢铁(集团)有限公司技术中心, 030003 太原)



摘要:

为改善430铁素体不锈钢的性能,主要研究了化学成分、铸坯等轴晶比例、热轧工艺制度、热卷退火工艺对材料组织和性能的影响．通过添加微量铝元素,同时降低过热度浇注,优化电磁搅拌工艺改善铸坯的结构．实验结果表明,通过不同热处理对比试验确定了最佳热处理工艺,热卷退火温度为950～1 000 ℃,保证了成品材料具有优异的力学性能和工艺性能．

关键词:  化学成分  热处理制度  组织  性能

DOI：10.11918/j.issn.0367-6234.2015.03.019

分类号:TG142.1+4

基金项目:“十一 五”国家科技支撑计划“高品质特殊钢技术开发”基金(2007BAE51B00).



Study on processing and properties of 430 ferritic stainless steel coil

LIU Hongtao^1,2, WU Chunjing¹, REN Xueping¹, LI Shuxia¹

(1.School of Materials Science and Engineering, University of Science and Technology Beijing,100083 Beijing,China; 2. Technology Center of Taiyuan Iron and Steel (Group) Co.Ltd., 030003 Taiyuan,China)

Abstract:

For improving properties of 430 ferritic stainless steel coil, effect of chemical composition, equiax crystal ratio of cast slab,hot-rolling processing, annealing of hot coil on microstrutures and properties of steel were investigated and anlyzed. By adding bit aluminium, decreasing superheat of metal in tundish and strengthen eletromagnetic stirring simultaneously, the microstructure of cast slab could be improved. The experimental results show that the optimal heat treatment system could be identified under the contrast test in different heat treatment system; simultaneously, when the annealing temperature is 950～1 000 ℃,the finished steel plate could show be the excellent mechanics and process properties.

Key words:  chemical composition  heat treatment system  microstructure  property