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EVALUACIÓN DE LA RESISTENCIA AL DESGASTE ABRASIVO EN RECUBRIMIENTOS DUROS PARA APLICACIONES EN LA INDUSTRIA MINERA

2004; Volume: 2; Issue: 25 Linguagem: Inglês

10.22517/23447214.7217

2344-7214

Juan Carlos Gutiérrez, Lisys Margarita León Sevilla, Dairo Hernán Mesa Grajales, Alejandro Toro,

Advanced materials and composites

The resistance to abrasive wear of two hardfacing alloys containing either high Cr or high W was studied. The alloys were deposited onto AISI A36 steel plates by a SMAW procedure. An alloy applied by oxyacetylene welding was used as comparison material. Wear resistance was measured in a dry sand – rubber wheel testing machine according to ASTM G65 standard, procedure A. The worn surfaces and the microstructure of the samples were analyzed in optical and scanning electron microscope, while the hardness of the deposits was measured in a Rockwell hardness tester. The best abrasion resistance was obtained in microstructures composed of primary (Fe,Cr)7C3 carbides and eutectic matrix, while higher mass losses were measured in Fe-Cr-C specimens containing primary austenite. The FeW-C hardfacing also showed good abrasion resistance due to the high hardness and deformability of the structure.