钙含量对钢水流动性的影响  

Influence of Calcium Content on Fluidity of Ca-treated Liquid Steel

作　　者：袁方明[1] 王新华[1] 杨学富[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]宝钢股份有限公司制造部,上海201900

出　　处：《钢铁钒钛》2006年第1期27-32,共6页Iron Steel Vanadium Titanium

摘　　要：钙处理钢水能够在较低过热度下正常浇铸。为弄清楚钙处理影响钢水流动性的原因和确定最佳的钙含量范围，从钙含量和钢水中夹杂物同相率之间的关系方面研究了钙元素在钢水中的行为。分析不同钙含量的钙处理钢试样中的夹杂物成分并利用Al2O3-CaO-SiO2三元相图确定试样中钙铝和钙铝硅酸盐夹杂物在浇铸温度下的存在状态。由此得到钙含量和夹杂物同相率之间的关系。改善钢水流动性最佳的钙含量范围在（17～23）×10^-6之间。It is found that Ca - treated liquid steel can be cast at lower superheat. In order to ascertain the reason that the castability of Ca - treated liquid steel is improved and to find optimal range of calcium content, behavior of calcium in liquid steel was studied in terms of relationship between calcium content and solid ratio of inclusions. By analyzing the composition of inclusions in Ca - treated steel samples of different calcium content, especially calcium aluminate or calcium aluminum silicate inclusions, the relationship between calcium content and solid ratio of inclusions was obtained by means of Al2O3 - CaO - SiO2 phase diagram. For making well effect of Ca treatment and improving fluidity or castability of Ca - treated liquid steel, the optimum calcium content should be （17- 23） × 10^-6.

关 键 词：钢 钙处理 非金属夹杂物 固相率 流动性 

分 类 号：TF769[冶金工程—钢铁冶金]