【摘要】 对国内外几家特钢厂生产的GCr15轴承钢中夹杂物进行了试验分析 ,结果表明 ,在炉渣碱度较高 (CaO SiO2 =3～ 4 5 )的精炼条件下 ,低氧含量 (≤ 7× 10 - 6 )的轴承钢中夹杂物主要为 :含Cr、Fe的复合MnS夹杂 ,TiN型夹杂 ,具有不同MgO含量的镁铝尖晶石 (MgO·Al2 O3)夹杂 ;未发现单独存在的铝酸钙型 (CaO·Al2 O3)球状夹杂物。随渣碱度提高和钢中氧含量降低 ,镁铝尖晶石夹杂物中的MgO含量增加 ;当渣系碱度CaO SiO2 达 4 5时 ,镁铝尖晶石夹杂物中含有CaO。更多还原

【Abstract】 The inclusions in bearing steel GCr15 produced by several special steel works at home and abroad have been tested and analyzed. Results showed that in condition of higher basicity (CaO/SiO 2 = 3～4.5) refining, the main inclusions in bearing steel with oxygen content less than 7×10 -6 were compound MnS contained Cr and Fe, TiN, and MgO·Al 2O 3 magnesium-alumina spinel with different MgO content; and the sphere inclusion of calcium aluminate CaO·Al 2O 3 was not found in steel. The MgO content in magnesium-alumina inclusion increased with slag basicity increasing and oxygen content in steel decreasing; and as slag basicity - CaO/SiO 2 was up to 4.5 the magnesium-alumina inclusion contained CaO.更多还原