Enhanced Refinement of Cr23C6 by Heterogeneous Nucleation in Annealed Nitrogen-Alloyed 4Cr5Mo2V Die Steel

The enhanced refinement of Cr 23 C 6 by heterogeneous nucleation in annealed nitrogen-alloyed 4Cr5Mo2V die steel was investigated. The refinement was ascribed to the increase of undissolved V(C,N) that served as the nucleation of Cr 23 C 6 . A three-step reaction (M 3 C → M 7 C 3  → M 23 C 6 ) was a...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2019-02, Vol.50 (2), p.518-522
Main Authors: Gu, Jinbo, Li, Jingyuan, Chang, Ruijin
Format: Article
Language:English
Subjects:
Alloy steels
Annealing
Characterization and Evaluation of Materials
Chemistry and Materials Science
Communication
Crystallography
Die steels
Materials Science
Metallic Materials
Nanotechnology
Nitrogen
Nucleation
Structural Materials
Surfaces and Interfaces
Thin Films
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Summary:The enhanced refinement of Cr 23 C 6 by heterogeneous nucleation in annealed nitrogen-alloyed 4Cr5Mo2V die steel was investigated. The refinement was ascribed to the increase of undissolved V(C,N) that served as the nucleation of Cr 23 C 6 . A three-step reaction (M 3 C → M 7 C 3  → M 23 C 6 ) was assumed to explain the nucleation process of Cr 23 C 6 . The possibility of nucleation of M 3 C on V(C,N) was validated by classical nucleation theory, and the crystallographic relationship was accurately described using the Turnbull-Vonnegut disregistry.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-018-5020-6