Wear of white cast irons by impact of direct reduced iron pellets

• Published in: Wear Vol. 259; no. 1; pp. 361 - 366
• Main Authors: Maldonado-Ruíz, S.I., Martínez, D.I., Velasco, A., Colás, R.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 01.07.2005; Amsterdam Elsevier Science; New York, NY
• Subjects: Alloyed irons; Applied sciences; Castings; Erosion; Exact sciences and technology; Friction, wear, lubrication; Machine components; Mechanical engineering. Machine design; Microstructure; Castings; Microstructure; Alloyed irons; Erosion; Experimental study; Iron alloy; Carbon; Casting; Experimental design; Eutectic; Wear; Chromium; Titanium; Chemical composition; Wear resistance; Carbides; White cast iron; Tribology
• ISSN: 0043-1648; 1873-2577
• DOI: 10.1016/j.wear.2005.02.061

A series of eight experimental white iron castings were subjected to the impact of direct reduced iron pellets at a temperature of 550 °C. The samples were cast in permanent moulds following an experimental design in which the ratio of chromium to carbon equivalent, the amount of molybdenum and that of vanadium plus titanium were varied each in two different levels. It was found that the amount of material removed from the samples was related to the chemical composition of the alloys, in such a way that the samples with the higher amounts of molybdenum were the ones that exhibit higher wear. It was observed that the samples that exhibited a high resistance to erosion were those in which the eutectic aggregate had a fine distribution, and with a high proportion of the pre-eutectic carbides above 500 μm 2. A mechanism that relates these experimental observations is proposed.