邢钢低碳400系铁素体不锈钢AOD控氮工艺实践  

AOD Nitrogen Control Pratice of of Low Carbon 400 Series Ferritic Stainless Steel at Xingtai Iron and Steel

作　　者：李广斌 赵迎凯 吴广海 杨强强 木永卫 郭志彬 Li Guangbin;Zhao Yingkai;Wu Guanghai;Yang Qiangqiang;Mu Yongwei;Guo Zhibin(Stainless Steel Company,Xingtai Iron and Steel Co Ltd,Xingtai 054027;Hebei Wire and Cable Engineering Technology Research Center,Xingtai 054027)

机构地区：[1]邢台钢铁有限责任公司不锈钢公司,邢台054027 [2]河北省线材工程技术研究中心,邢台054027

出　　处：《特殊钢》2020年第1期24-27,共4页Special Steel

摘　　要：在低碳400系不锈钢中,氮能恶化晶间腐蚀、低温冲击韧性、缺口敏感性和焊接等性能。因此,在低耗、高效前提下降低其氮含量成为AOD冶炼中的重要课题。结合生产试验,通过探讨回归分析法在其吹氩脱氮工艺控制中的应用,结合脱氮的热力学计算对AOD生产实践数据的分析,由拟合方程确定的AOD冶炼410S不锈钢和低碳430不锈钢时氮氩切换点为吹氮450 m^3时切换氩气,410S不锈钢正常冶炼时一般吹氩量控制在1550 m^3,低碳430不锈钢AOD吹氩量一般控制在2050 m^3时可以将AOD终点氮含量控制在0.0090%以下,并降低氩气消耗。Nitrogen can deteriorate intergranular corrosion,low temperature impact toughness,notch sensitivity and soldering properties of low carbon 400 series stainless steel.Therefore,reducing the nitrogen content under the premise of low consumption and high efficiency has become an important issue in AOD smelting.Combined the production test,by exploring the application of regression analysis in the control of argon-denitrification process and combined with the thermodynamic calculation of denitrification to analyze the production data of AOD,it is determined by the fitting equation that the switching point of nitrogen to argon is at blowing nitrogen 450 m^3,the normal blowing argon amount of 410 S stainless steel in AOD is controlled at 1550 m^3,and the blowing argon amount of low carbon 430 stainless steel in AOD is generally controlled at 2050 m^3 to get controlled[N]below 0.0090%and reduce of argon consumption.

关 键 词：低碳400系不锈钢 AOD 氮氩切换点 

分 类 号：TF764.1[冶金工程—钢铁冶金]