熔体过热处理对一种镍基合金氮含量的影响

来源期刊：有色金属2011年第2期

论文作者：裴忠冶 田彦文

文章页码：63 - 67

关键词：镍基合金； CaO坩埚； 熔体处理； 脱氮

Key words：nickel-base alloy； CaO crucible； melt treatment； denitrogenation

摘    要：研究在采用CaO坩埚真空感应熔炼的条件下,经不同温度的熔体过热处理后,一种镍基合金中氮含量的变化,并对镍基合金中脱氮机理进行了探讨。结果表明,在采用相同的浇注温度和模壳温度条件下,提高熔体过热处理温度能促进合金的脱氮,且试验值与理论预测值吻合的较好。超过1 790℃时,合金产生吸氮现象。采用稳定性较高的CaO坩埚,合金中氧含量一直保持在较低的水平。

Abstract: The effects of melt superheating treatment on nitrogen content in a kind of nickel-base alloy and the mechanics of denitrogenation in nickel based alloy under the condition of VIM in CaO crucible were investigated.The results show that with the same pouring temperature and mould temperature,melt superheating treatment promotes denitrogenation process of the nickel-base superalloy.Though at the higher temperature of melt treatment,there is an increase of nitrogen content.The content of oxygen is stable on a low level because of the using of CaO crucible.