帘线钢中非金属夹杂物的控制技术研究
来源期刊:钢铁2009年第3期
论文作者:赵中福 余新河 洪军 赵继宇 易卫东 王国平
文章页码:40 - 44
关键词:帘线钢; 夹杂物; 碱度; 精炼
Key words:tire cord steel; inclusion; basicity; refining
摘 要:采用转炉、LF精炼、真空处理、软吹、连铸工艺生产帘线钢,将钢水中S、P、Ti、As等残余元素的含量尽可能降低,出钢采用含超低铝和钛的合金,使用低碱度的酸性渣进行炉外精炼,严格控制钢中酸溶铝含量,同时控制渣中MgO、Al2O3含量,将帘线钢中的非金属夹杂物控制在锰铝榴石(3MnO-Al2O3-3SiO2)和位于钙斜长石(CaO-Al2O3-2SiO2)和假硅灰石(CaO-SiO2)共晶线周边的玻璃态塑性夹杂区域内,尽可能降低钢中不可变形夹杂物,如Al2O3和(Mg、Mn)O·Al2O3的数量和大小,通过控制钢中钛、氮含量来消除TiN(TiCN)夹杂。
Abstract: Tire cord steel is produced by oxygen converter,ladle furnace,vacuum degassing and billet casting processes at No.1 steelmaking plant,WISCO.The residual elements in steel such as S、P、Ti、As are controlled as low as possible.The extra low Al and Ti ferrous alloys are used during converter tapping,and acid ladle slag for refining processes.The dissolved Al in liquid steel,Al2O3 and MgO in ladle slag are limited strictly.The deformable,glassy and low melting point inclusions,which locate in the regions of plastic inclusions between anorthite and pseudo-wollastonite,and spessartite in CaO-SiO2-Al2O3 and SiO2-MnO-Al2O3 respectively,can be obtained.Meanwhile,the size and amount of undeformable inclusions such as Al2O3,(Mg,Mn)O·Al2O3 can be controlled as low as possible.TiN(TiCN) inclusions can be eliminated by controlling titanium and nitrogen content in steel.
赵中福1,2,余新河2,洪军2,赵继宇2,易卫东2,王国平2
(1.湖北省武汉市武汉科技大学 材料冶金学院
2.湖北省武汉市 武汉钢铁(集团)公司第一炼钢厂)
摘 要:采用转炉、LF精炼、真空处理、软吹、连铸工艺生产帘线钢,将钢水中S、P、Ti、As等残余元素的含量尽可能降低,出钢采用含超低铝和钛的合金,使用低碱度的酸性渣进行炉外精炼,严格控制钢中酸溶铝含量,同时控制渣中MgO、Al2O3含量,将帘线钢中的非金属夹杂物控制在锰铝榴石(3MnO-Al2O3-3SiO2)和位于钙斜长石(CaO-Al2O3-2SiO2)和假硅灰石(CaO-SiO2)共晶线周边的玻璃态塑性夹杂区域内,尽可能降低钢中不可变形夹杂物,如Al2O3和(Mg、Mn)O·Al2O3的数量和大小,通过控制钢中钛、氮含量来消除TiN(TiCN)夹杂。
关键词:帘线钢; 夹杂物; 碱度; 精炼