Per: NIRVANA CECILIA RIBEIRO (INSTITUTO TECNOLÓGICO VALE), Renato Chaves Pereira da Silva (INSTITUTO TECNOLÓGICO VALE), José Luiz Pena Andrade (VALE S.A.), Cíntia Braga Briseno (VALE s.a.), Cristian Viáfara (INSTITUTO TECNOLÓGICO VALE), Raquel Vieira Mambrini (CEFET-MG), José Jimmy Penagos (INSTITUTO TECNOLÓGICO VALE)
Abstract:
The tribocorrosive behavior of two tool steels, AISI H13 and D2 steels, was investigated using Miller equipment using a methodology adapted from the ASTM G75 standard. Two types of iron ore slurries were used, and another one of a normal Brazilian sand (IPT) with a grain size of 0.30-0.15 mm. D2 steel (61 HRC), characterized by the presence of chromium carbides in a martensitic matrix, showed superior tribological performance when compared to H13 steel, a martensitic steel with a hardness of 52 HRC. Using the sand slurry as a reference D2 steel showed less wear, being 1.5 times less with the A1 ore slurry and 5 times less with the A2 ore slurry. The classification was observed for abrasiveness of the slurries: Sand>A1>A2. The images of the wear surfaces showed less corrosion on D2 steel compared to H13. In addition, both materials showed a greater trend to corrosion in wear tests with iron ore slurries. In the aim of increasing the useful life of an iron ore agglomeration equipment, AISI D2 steel showed high wear resistance, with the prospect of scalability for field tests.