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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。
Through the thermodynamic calculation and three tests of Fe2O3 aeration and titanium deoxidation, the morphology, size and distribution of inclusions in steel and the microstructure and morphology of the steel were studied. The results show that oxygen and titanium in the steel can react with titanium to form titanium oxide when the content of oxygen in the control steel is more than 0.001% under the conditions of three oxygen and deoxidization processes. The thermodynamic analysis proves that the titanium oxide Ti2O3. The content of oxygen in the steel after titanium deoxidation is about 0.002%. The amount of titanium oxide with the particle diameter less than 2μm in the sample increases remarkably. The amount of titanium oxide between 2μm and 3μm is basically unchanged. These inclusions can induce acicular Ferrite precipitation, thereby refining the organization.