From monometallic to composites and ceramic wear resistant materials: an industrial challenge

The methodology adopted by Magotteaux for the development d of wear resistant materials is described based on the wear mechanism observed. This approach consists of of six steps from identification of wear mechanisms and mechanical constraints improvement of the industrial supply chain. This method is currently used for monometallic balls and liners grinding mills allows the optimal selection of steel or iron composition and heat treatment. Based on a large database of marked ball and liner tests, application-specific products and wear models have been established for tube mills. The same basic approach is also used for the mining industry based on slurry chemistry, recovery, grinding efficiency and wear reduction. The development of composite and ceramic material s is reviewed. The metal matrix composite (MMC ) parts are based on two families, namely oxides and carbides. Manufacturing challenges to produce these new wear resistant materials are described regarding the required properties and size of the castings. Some examples and wear results for vertical roller mills and crushers are also presented. Finally, ceramic beads are discussed for ultrafine grinding applications. (AU) Copyright © 20 8 Companhia Brasileira de Metalurgia e Mineração (CBMM) All rights reserved