B82帘线钢中多元塑性夹杂物控制的热力学  

Thermodynamic on control of multivariable plastic inclusions in B82 tyre cord steel

作　　者：赵烁[1] 曾建华[2] 吕静彩[1] 马良[1] 闫涛[1] 

机构地区：[1]河北工程大学装备制造学院,河北邯郸056038 [2]攀钢集团研究院有限公司钒钛钢研究所,四川攀枝花617000

出　　处：《兰州理工大学学报》2017年第2期6-12,共7页Journal of Lanzhou University of Technology

基　　金：河北省钢铁联合基金(E2016402096)

摘　　要：为了控制B82帘线钢中的夹杂物形态,不仅要减少氧化物夹杂的数量,而且要控制其在CaO-Al_2O_3-SiO_2系塑性变形区域内,即成分位于钙斜长石(CaO·Al_2O_3·SiO_2)、假硅灰石(CaO·SiO_2)以及相邻低熔点区域;通过钢中三元以上塑性夹杂物热力学计算并经理论分析得出,要使多元夹杂物同时转变为熔点低于1350℃、尺寸细小、变形能力较强的钙铝硅酸盐类夹杂物,必须满足钢中溶解氧质量分数控制在(40~100)×10^(-4)%,钢液中Al质量分数控制在0.1%~4×10^(-4)%,Ca活度在(0.05~10)×10^(-6)%,不允许有纯Al_2O_3和氮化物夹杂.In order to control the morphology of inclusions in B82 tyre cord steel, not only the quantity of oxide inclusions in steel should be reduced but also the inclusions should be confined within the plastic re- gion of CaO-Al2O3-SiO2 system, i.e. within the area of anorthite （CaO Al2O3 2SiO2）, pseudo wollas- tonite （CaO SiO2）, and adjacent low melting point area. By means of thermodynamic calculation of a- bove-ternary plastic inclusions in steel and theoretic analysis, the following conclusions could be obtained to make the multivariable inclusions transform simultaneously into a kind of inclusion of calcium aluminum Silicate with stronger deformation ability, fine grain size, and melting point lower than 1 350℃： the dis- solved oxygen content would be （40-100） ×10^-4%, mass-fraction of A1 （0. 1-4） ×10^-4% in molten steel, activity range of Ca （0. 05-10）×10^-6%, and pure A1203 and nitride inclusions would not be allowed.

关 键 词：B82帘线钢 热力学计算 塑性夹杂物 低熔点区域 溶解氧 

分 类 号：TF701.2[冶金工程—钢铁冶金]