Abstract: The effect of magnesium oxide (/c/c: 97. 60MgO, 1.34CaO), Calcium Oxide (/% ： 98. 70CaO, 0. 55MgO) and alumina-magnesium) oxide (/c/c: 85. 57Al₂O3, 11. 36MgO, 2. 47CaO) crucible of 200 kg and 500 kg vacuum induction furnace on oxygen and sulfur content in melted nickel base alloy Inconel 690 (/% ：0. 01 - 0. 03C, 27. 0 ~ 31. 0(2r, 7. 0 ~ 11.0Fe) has been studied and analyzed. Results show that the oxygen content in alloy melted with alumina- magnesian oxide crucible is lowest i. e. (10 - 15) x 10^-6 [O]： with (50 - 60) x 10^-6[S]; the sulfur content in alloy melted with calcium oxide crucible is lowest i. e. 10 x 10^-6 ，[S] with (27 - 48) x 10^-6[O]. the sulfur content and oxygen content in alloy melted with magnesium oxide crucible are higher i.e. (50 〜60) x 10^-6 [S] and (24 ~ 35) x 10^-6[O].

摘要： 研究和分析了200 kg和500 kg真空感应炉镁质(/%:97.60MgO、1.34CaO)、钙质(/%:98.70CaO、0.55MgO)和铝镁质(/%:85.57Al₂O₃、11.36MgO、2.47CaO)坩埚对所熔炼的Inconel 690镍基合金(/%:0.01～0.03C、27.0～31.0Cr、7.0～11.0Fe)中氧、硫含量的影响。结果表明,铝镁质坩埚冶炼的合金中氧含量最低,为(10～15)×10^-6[O]和(50～60)×10^-6[S];CaO坩埚冶炼的合金中硫含量最低,为10×10^-6[S]和(27～48)×10^-6[O];MgO坩埚冶炼的合金中氧、硫含量较高,为(50～60)×10^-6[S]和(24～35)×10^-6[O]。