Phase Transformations and Microstructural Observations During Subcritical Heat Treatments of a High-Chromium Cast Iron
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Authors
Karantzalis, A. E.
Lekatou, A.
Kapoglou, A.
Mavros, H.
Dracopoulos, V.
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Springer
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peer reviewed
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Journal of Materials Engineering and Performance
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In this study, Cr white iron of 18.23 wt.% was subjected to a series of subcritical heat treatments. At both temperatures of 350 and 450 A degrees C, no precipitation of secondary carbides was observed, and the overall microstructure resembles to that of the as-cast condition. At 550 A degrees C, hardness values increased slightly compared to the as-cast values. No evidence of secondary carbide formation was observed. At 650 and 750 A degrees C, extensive-to-complete transformation to pearlite-ferrite structures has occurred. Some evidence of secondary carbide precipitation especially for prolonged treatment periods was not adequate to obstruct the hardness decrease due to the dominating effect of pearlitic-ferritic formation. At 850 A degrees C, secondary carbide precipitation and martensite formation lead to high hardness values.
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cast iron, high chromium, secondary carbides, subcritical treatment, secondary carbide precipitation, 16cr-1mo-1cu white iron, abrasion resistance, wear-resistance
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<Go to ISI>://000304241200032
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en
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Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών