镍基高温合金真空感应熔炼脱氮与脱硫  

Denitrogenation and Desulphurization in VIM for Ni-base Superalloy Refining

作　　者：牛建平[1,2] 杨克努[1] 孙晓峰[1] 金涛[1] 管恒荣[1] 胡壮麒[1] 

机构地区：[1]中国科学院金属研究所 [2]沈阳大学,辽宁沈阳110044

出　　处：《稀有金属材料与工程》2003年第1期63-66,共4页Rare Metal Materials and Engineering

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坩埚不能脱硫;结合坩埚壁的XRD分析结果讨论了CaO坩埚脱硫机理;加Al对脱氮有促进作用,对脱硫具有重要作用,加Ti对脱氮有明显不利影响;提高熔炼时真空度是促进脱氮的有力措施。The denitrogenation and desulphurization behavior during refining Ni-base superalloy in VIM by using CaO crucible was studied. It was found that the desulphurization process did not occur by only using CaO crucible. Combining with the results of XRD analysis, the desulphurization mechanism of CaO crucible was proposed. The Al addition had beneficial effect, and played a very important role on desulphurization. And the Ti addition had adverse effect on denitrogenation. It was a powerful measure to increase vacuum level for 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：TF133[冶金工程—冶金物理化学] TF815