CAJ | 학술논문

通过氧氮分析、金相分析、大样电解法、扫描电镜及能谱分析等，研究采用KR-BOF-LF-CC工艺生产的汽车大梁钢LG510L的洁净度。结果表明，铸坯中平均T [O ]和氮含量分别为29．20×10-6和38．80×10-6；钢中显微夹杂物和大型夹杂物数量都随着各工序的不断进行大体呈递减趋势；钙处理前主要显微夹杂物为Al2 O3，经过钙处理后，夹杂物发生变性，主要为CaO-Al2 O3；铸坯中大型夹杂物主要是SiO2和硅铝酸盐，来源于脱氧产物及其与耐火材料或炉渣反应的产物。
통과양담분석、금상분석、대양전해법、소묘전경급능보분석등，연구채용KR-BOF-LF-CC공예생산적기차대량강LG510L적길정도。결과표명，주배중평균T [O ]화담함량분별위29．20×10-6화38．80×10-6；강중현미협잡물화대형협잡물수량도수착각공서적불단진행대체정체감추세；개처리전주요현미협잡물위Al2 O3，경과개처리후，협잡물발생변성，주요위CaO-Al2 O3；주배중대형협잡물주요시SiO2화규려산염，래원우탈양산물급기여내화재료혹로사반응적산물。
By means of oxygen and nitrogen analyzer , metallographic examination , SLIM E , SEM , EDS ,etc ,the cleanliness of automobile frame steel LG510L produced by the KR-BOF-LF-CC process was studied .The result shows that the average T [O] and nitrogen content in the slab are 29 .20 × 10-6 and 38 .80 × 10-6 and the numbers of micro-inclusions and large inclusions in the steel are reduced steadily with each process .The micro-inclusions before calcium treatment are mainly Al2 O3 and after calcium treatment ,the inclusions are modified and transformed into CaO-Al2 O3 .The large inclusions in the slab are mainly SiO 2 and aluminosilicate ,w hich are mainly deoxidation products and their reac-tion with refractories or slag .