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Investigation on Denitrogenation Technology and Mechanism during VIM Refining Ni-Base Superalloy

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Abstract:

The denitrogenation technology and mechanism of a new kind of Ni-base superalloy during vacuum induction melting (VIM) were studied. The nitrogen content could be reduced from 0.0005% to 0.0002% by this technology. The calculated interaction coefficient of Ti with N () is about -0.38, and the activity coefficient of N () is 0.714. The denitrogenation mechanism was discussed through the calculation of the reaction ratio constants and .

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Periodical:

Advanced Materials Research (Volumes 284-286)

Pages:

2433-2436

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.284-286.2433

Citation:

Cite this paper

Online since:

July 2011

Authors:

Jian Ping Niu, Zhuang Qi Hu

Keywords:

Denitrogenation, Kinetic, Ni Based Superalloy, Thermodynamic

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