硅锰镇静钢中非金属夹杂物三维全尺寸形貌分析研究

发布时间：2018-11-10 23:19

【摘要】：结合Si-Mn镇静钢中非金属夹杂物的组成及相关化学特性,构建了以有机电解液为核心、辅以直流稳压电源的夹杂物三维原貌电解装置,并以Q235钢为代表,利用体视显微镜和扫描电镜对其内部夹杂物的基本形貌和成分进行了系统的分析研究。结果表明实验方法能有效得到Si-Mn镇静钢中夹杂物的真实三维形貌。对于Si-Mn镇静钢的全尺寸电解,其最佳电解液配比为体积比为1∶1的溴水、乙醇混合溶液作为缓冲溶液,200g/L NaCl溶液作为电解质,且NaCl溶液占电解液的10%(体积分数);电解电流控制在0.10~0.15A之间,电解时间控制在20~40min。与此同时,Q235钢的电解分析结果表明,其夹杂物种类主要为SiO2-Al2O3-MnO-TixOy复合夹杂,夹杂物类型以透明和不透明的球形为主,同时还有少量的立方体形、棒状、椭球型和不规则形,部分夹杂物尺寸超过200μm。
[Abstract]:Based on the composition and chemical characteristics of non-metallic inclusions in Si-Mn killed steel, a three-dimensional original electrolysis device with organic electrolyte as the core and DC power supply as the core was constructed, and Q235 steel was used as the representative. The basic morphology and composition of inclusions were studied by stereoscopic microscope and scanning electron microscope. The results show that the real 3D morphology of inclusions in Si-Mn killed steel can be obtained effectively by the experimental method. For the full-scale electrolysis of Si-Mn killed steel, the optimum electrolyte ratio is bromine water with the volume ratio of 1:1, the mixed ethanol solution as the buffer solution, the 200g/L NaCl solution as the electrolyte. NaCl solution accounted for 10% (volume fraction) of electrolyte; The electrolysis current is controlled between 0.10 ~ 0.15A and the electrolysis time is controlled at 20 ~ 40 min. At the same time, the results of electrolysis analysis of Q235 steel show that the inclusions are mainly SiO2-Al2O3-MnO-TixOy inclusions, the inclusions are mainly transparent and opaque spherical, and there are a few cubes and rods. The inclusions are ellipsoidal and irregular, and some inclusions are more than 200 渭 m in size.
【作者单位】：华北理工大学冶金与能源学院;河北省高品质钢连铸工程技术研究中心;
【基金】：河北省自然科学基金资助项目(E2012401068)
【分类号】：TG142.1

【参考文献】