真空感应炉坩埚材质对Cr12钢纯净度的影响

Effect of crucible materials of vacuum induction furnace on cleanliness of steel Cr12

研究和分析了10蛞真空感应炉MgO和CaO坩埚对所熔炼Crl2钢的纯净度影响．结果表明，采用MgO坩埚进行真空冶炼，精炼真空度为50～100Pa时，钢中叫[0]达到最低，为0．00279％，精炼真空度为5—10Pa时，钢中W[N]达到最低，为0．0018％；采用CaO坩埚进行真空冶炼，精炼真空度为5—10Pa时，钢中W[O]达到最低，为0．00058％，钢中W[N]也达到最低，为0．0015％．

The effects of magnesium oxide and calcium oxide crucibles in 10kg vacuum induction furnace on oxygen and nitrogen contents in molten steel Crl2 where been studied and analyzed. The results showed that the oxygen content reaches a lowest point 0. 00279% at refining pressure 50 - 100 Pa and the nitrogen content reaches a lowest point 0. 0018% at refining pressure 5 - 10 Pa with the magnesium oxide crucible; the oxygen content reaches a lowest point 0. 00058% at refining pressure 5 - 10 Pa and the nitrogen content reaches a lowest point 0. 0015% at the same pressure with the calcium oxide crucible.