Effects of Cr Concentration on Cementite Coarsening in Ultrahigh Carbon Steel

Ultrahigh carbon steels (UHCS) containing 1 wt pct Cr (1Cr UHCS) were heat treated at 1073 K, 1173 K, or 1243 K (800 °C, 900 °C, or 970 °C) for durations of 5 minutes up to 24 hours to study cementite coarsening. Results were compared to a previous study on coarsening of a UHCS with 4 wt pct Cr (4Cr...

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Veröffentlicht in:	Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2019-10, Vol.50 (10), p.4779-4790
Hauptverfasser:	Hecht, Matthew D., Picard, Yoosuf N., Webler, Bryan A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Cementite Characterization and Evaluation of Materials Chemistry and Materials Science Coarsening Heat treating Heat treatment High carbon steels Materials Science Metallic Materials Nanotechnology Structural Materials Surfaces and Interfaces Thin Films
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Zusammenfassung:	Ultrahigh carbon steels (UHCS) containing 1 wt pct Cr (1Cr UHCS) were heat treated at 1073 K, 1173 K, or 1243 K (800 °C, 900 °C, or 970 °C) for durations of 5 minutes up to 24 hours to study cementite coarsening. Results were compared to a previous study on coarsening of a UHCS with 4 wt pct Cr (4Cr UHCS) and significantly different behavior was observed. In the heat-treated 1Cr UHCS, particles clustered in zones that were tens of microns near branches of the cementite network. The opposite trend was observed in the 4Cr UHCS, in which the regions within a few microns near the cementite network were entirely denuded of particles. Causes for differences in coarsening behavior in 1Cr and 4Cr UHCS are discussed.
ISSN:	1073-5623 1543-1940
DOI:	10.1007/s11661-019-05403-w