Engenharia Mecânica

URI Permanente desta comunidade

http://repositorio.ufes.br/handle/10/17620
Programa de Pós-Graduação em Engenharia Mecânica

Centro: CT
Telefone: (27) 4009 2116
URL do programa: http://www.engenhariamecanica.ufes.br/pos-graduacao/PPGEM

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Navegando Engenharia Mecânica por Autor "Albertin, Eduardo"

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    Caracterização mecano tribológica e comportamento em corrosão de revestimentos depositados por atrito
    (Universidade Federal do Espírito Santo, 2010-12-20) Ferreira, Marcela Gonçalves; Franco, Sinésio Domingues; Macêdo, Marcelo Camargo Severo de; Albertin, Eduardo; Silva, Flávio José da
    Many processes of friction welding have been studied, among which stands out a process known as Friction Surfacing. This technique consists on deposition of the material by one bolt at other material using increases rotations and forces. To perform it, an equipment from the Laboratory of Techniques in Friction and Wear of the Federal University of Uberlandia has been used, the Processing Unit of Pins for Friction (UPPA), which was able to repair things by friction, among them the filling trials (FHPP), which has been modified and implemented a control system of a platform, then allowing to accomplish the trials for coating with steel AISI 420, which are supplied to the controlling program the repairing parameters. The advantages of this technique are the excellent metallurgical bond among the materials associate to a refined structure. Through this technique is possible to apply different types of materials on substrates, resulting in increments on resistance against corrosion or erosion. The base material used was a carbon steel and the material of deposition was made of stainless steel AISI 420. The aim of this study is to evaluate the effect of the main parameters of the coating process’ variation, through the evaluation of the Scanning Electron Microscopyand Optical Microscopy’smicrostructure of the coated layer’s thickness, microhardness and evaluation of the resistance to the corrosion when submitted the tests of static Corrosion, Erosion and solids-free impingement.The results showed that there was a grain refinement in the affected heat zone, thereby increasing its hardness.The analysis of the coating showed resulted of higher wearand corrosion resistance when compared to the original material of the rod
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    Efeito da carga e do tamanho do grão abrasivo no desgaste do ferro fundido branco 19,9 % cromo e 2,9 % carbono
    (Universidade Federal do Espírito Santo, 2013-04-01) Tozetti, Karla Dubberstein; Albertin, Eduardo; Scandian, Cherlio; Pintaúde, Giuseppe; Silva, Flávio José da
    In this research, the effects of different applied load and abrasive size on the martensitic high-chromium write cast iron (with a chemical composition: 2,9% carbon and 19,9% chromium) abrasive wear was investigated. The alloy s microstructure consists of: a matrix martensite tempered at 200 ° C with eutectic carbide. Abrasive wear tests using a pin test on silica and garnet paper were carried out using three different abrasives sizes: 63 μm, 149 μm e 177 μm and two applied load: 5 N e 10 N. And the rubber wheel abrasion test (ASTM standard G-65) was carried out using three abrasives sizes: 87 μm, 115 μm e 170 μm and three distinct applied loads: 44 N, 80 N e 130 N. The specimens wear surface was examined by scanning electron microscopy (SEM) for identifying the wear mechanism. The rubbers wheel abrasion test results show that: the mass loss of the write cast iron alloy increases linearly with the increase of particle size until the critical particle size is reached. In pin test on silica paper, to the largest abrasive size, the lost volume in abrasion tripled with applied load increasing of 5 N to10 N. In general, the mass loss increases with the increase of the load applied and the abrasive size.