Effect of Nitrogen on Creep Properties of 22Cr-25Ni Austenitic Heat-Resistant Steels

Yong Uk Kim; Woo Sang Jung; Young Hoon Chung; S.I. Kwun

doi:10.4028/www.scientific.net/KEM.385-387.425

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 385-387Effect of Nitrogen on Creep Properties of...

Effect of Nitrogen on Creep Properties of 22Cr-25Ni Austenitic Heat-Resistant Steels

Abstract:

The effect of nitrogen on creep properties of 22Cr-25Ni austenitic heat-resistant steels with different nitrogen content was studied. The tensile and creep strength increased with increasing nitrogen content. The tensile strength increased due to grain refinement by Nb-rich carbonitride. The creep strength increased with increasing nitrogen content because nitrogen retarded the formation and growth rate of Cr-rich carbide and the growth rate of Nb-rich carbonitride during creep.

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Periodical:

Key Engineering Materials (Volumes 385-387)

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425-428

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.385-387.425

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Online since:

July 2008

Authors:

Yong Uk Kim, Woo Sang Jung, Young Hoon Chung, S.I. Kwun

Keywords:

Austenitic Heat Resistant Steel, Creep Properties, Nitrogen Effect, Precipitation

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