【摘要】 分析和研究了EAF-LF(VD)-CC各工序39Mn2V钢的T[O]和[N]以及钢中非金属夹杂物。结果表明,LF(VD)后T[O]为28×10-6,铸坯T[O]为(8~10)×10-6;钢中夹杂物主要为A l2O3、MnS、球形铝酸钙,尺寸≤20μm。铸坯存在一些80~300μm夹杂物,主要来源于二次氧化、耐火材料侵蚀和结晶器卷渣。更多还原

【Abstract】 The total oxygen content（T[O]）,nitrogen content （[N]） and non-metallic inclusion in steel 39Mn2V at each phase of EAF-LF（VD）-CC process have been analyzed and studied.The results indicated that the（T[O]） was 28×10^-6 after LF（VD） refining and the（T[O]） of cast billet was（8¹0） ×10^-6;and the inclusions in steel were mainly Al₂O₃,MnS,spherical calciumaluminate with size ≤20 μm.there were some inclusions with size 80³00 μm which originated from secondary oxidation,refractory material erosion and slag entrapment in mold.更多还原