镍基高温合金的脱氮与脱硫  

Denitrogenation and desulphurization during VIM refining Ni-base superalloy

作　　者：牛建平[1] 

机构地区：[1]沈阳大学机械工程学院,辽宁沈阳110044

出　　处：《沈阳大学学报》2003年第2期5-8,14,共5页

摘　　要：研究了采用CaO坩埚真空感应熔炼镍基高温合金过程中脱氮与脱硫行为。发现只用CaO坩埚并不脱硫 ;根据坩埚壁成分分析数据 ,讨论了CaO坩埚脱硫机理 ;加A1对脱氮有利 ,对脱硫具有重要的作用 ,加Ti则对脱氮有明显不利影响 ;计算了不同真空度及加A1和Ti条件下Ni- 6Cr- 5Co - 2Mo- 6W合金在 1 60 0℃时氮的溶解度 ;提高熔炼真空度是促进脱氮的有力措施。The denitrogenation and desulphurization process during VIM refining Ni-base superalloy by using CaO crucible was studied.It is found that the desulphurization process did not occur by only using CaO crucible.According to the results of composition analysis,the desulphurization mechanism is proposed.Al addition has beneficial effect on denitrogenation,and has very important role on desulphurization.Ti has adverse effect on denitrogenation.Increasing the vacuum level is a powerful measure to accelerate the denitrogenation process.

关 键 词：镍基高温合金 真空感应熔炼 CAO坩埚 脱氮 脱硫 

分 类 号：TF141+.2[冶金工程—冶金物理化学]