Microstructural evaluation of wear resistant high chromium, high carbon cast irons

Autor:	S. I. Maldonado-Ruiz, Rafael Colás, A. Velasco, David López
Rok vydání:	2004
Předmět:	Austenite Materials science Scanning electron microscope Mechanical Engineering Metallurgy chemistry.chemical_element Direct reduced iron Condensed Matter Physics Microstructure Carbide Chromium chemistry Mechanics of Materials Molybdenum General Materials Science Eutectic system
Zdroj:	Materials Science and Technology. 20:393-398
ISSN:	1743-2847 0267-0836
DOI:	10.1179/026708304225012224
Popis:	The microstructure of a series of experimental high chromium, high carbon cast irons was examined by optical and electron microscopy to determine the mechanisms that impart their resistance to wear by impact of reduced iron pellets at 550 ° C. The samples were cast following an experimental design in which the amount of different carbide forming elements was varied. The microstructure of these alloys was found to consist of a primary network of M7C3 carbides surrounded by an austenitic matrix and eutectic carbides. It was found that the size distribution of the proeutectic primary carbide exerts an influence on wear, but no correlation was found between the hardness of the different constituents and wear. The experimental results indicate that the alloys cast with the greatest amounts of molybdenum showed the lowest resistance to wear. Scanning electron microscopy of a low wear resistant sample showed evidence of the localisation of molybdenum in proeutectic carbides.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::efaa74c5839cda947a5cd5f048062544 https://doi.org/10.1179/026708304225012224 Zobrazit plný text záznamu Plný text ve formátu PDF