摘要
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Al2O3,经过钙处理后,夹杂物发生变性,主要为CaO-Al2O3;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。
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 ,which are mainly deoxidation products and their reac-tion with refractories or slag .
出处
《武汉科技大学学报》
CAS
2014年第2期111-115,共5页
Journal of Wuhan University of Science and Technology
