Influence of Cooling Rate After Destabilization on Microstructure and Hardness of a High-Cr Cast Iron

Influence of Cooling Rate After Destabilization on Microstructure and Hardness of a High-Cr Cast Iron

This study investigates the impact of cooling rate after destabilization at 980 °C on the microstructure of 23 wt pct Cr–2.7wt pct C hypoeutectic high-Cr cast iron. Lowering cooling rate intensifies the secondary carbides formation, depleting carbon in austenite. This raises the martensite start tem...

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Veröffentlicht in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2024-06, Vol.55 (6), p.1722-1727
Hauptverfasser: Le Nué, Charline, Gallo, Santiago Corujeira, Vahid, Alireza, Taherishargh, Mehdi, Attar, Hooyar, Fabijanic, Daniel, Barnett, Matthew
Format: Artikel
Sprache:eng
Schlagworte:
Brief Communication
Cast iron
Characterization and Evaluation of Materials
Chemistry and Materials Science
Cooling
Cooling rate
Destabilization
Hardness
Heat treating
Martensite
Materials Science
Metallic Materials
Microstructure
Nanotechnology
Structural Materials
Surfaces and Interfaces
Thin Films
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Beschreibung
Zusammenfassung:This study investigates the impact of cooling rate after destabilization at 980 °C on the microstructure of 23 wt pct Cr–2.7wt pct C hypoeutectic high-Cr cast iron. Lowering cooling rate intensifies the secondary carbides formation, depleting carbon in austenite. This raises the martensite start temperature and lowers the bulk hardness. We thereby provide evidence explaining the origin of the sensitivity to cooling rate in high-Cr cast irons.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-024-07393-w