3次钛脱氧钢中非金属夹杂物及组织研究  

Investigation of nonmetallic inclusions in titanium-killed steel by a three stages deoxidization technology

作　　者：尚德礼[1] 李德刚[1] 吕春风[1] 康磊[1] 

机构地区：[1]鞍钢股份有限公司技术中心,辽宁鞍山114009

出　　处：《炼钢》2014年第1期13-16,共4页Steelmaking

摘　　要：通过热力学计算及3次Fe2O3增氧和钛脱氧的试验,研究了钢中夹杂物的形态、尺寸及分布规律和钢的组织形貌特征。试验结果表明:3次增氧和脱氧工艺条件下,控制钢中氧质量分数大于0.001%时,钢中的氧与钛可反应生成含钛氧化物,热力学分析证明此条件下生成的钛氧化物为Ti2O3。钛脱氧后钢中氧质量分数在0.002%左右,试样中颗粒直径小于2μm的钛氧化物数量显著增加,在2μm和3μm之间的钛氧化物数量基本不变,这些夹杂物可诱发针状铁素体析出,从而细化组织。By thermodynamics calculation and increasing oxygen content with Fe2O3 addition and deoxidization with titanium addition for three times, the morphology, dimensions and distribution of nonmetallic inclusions and microstructure of steel in titaniumkilled steel were investigated. The results showed that, increasing oxygen and deoxida- tion process three times, and controlling the oxygen content in steel greater than 0. 001 %, oxygen and titanium can generate the titanium-containing oxide. Thermodynamic analysis proved that the titanium oxide was Ti2 O3. After adding titanium in the steel the mass fraction of oxygen was about 0. 002 %, and the number of titanium oxide below 2 μm increased and the number of titanium oxide between 2μm to 3μm changed little in the final sample. These inclusions could induce the precipitation of acicular ferrite through refine the organization.

关 键 词：热力学计算 3次脱氧工艺 Ti2O3 针状铁素体 氧含量 

分 类 号：TF703.5[冶金工程—钢铁冶金]