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Mostrando ítems 51-60 de 542
Estudo do efeito do boro e das condições de trefilação na delaminação de aços perlíticos
(Universidade Federal de Minas GeraisUFMG, 2009-03-19)
Delamination is a type of fracture that can occur in pearlitic steel wire when they are subjected to tension torsion. To better understand this phenomenon, in this study the effect of the addition of boron to steel and ...
Análise da influência do nióbio na microestrutura e propriedades mecânicas da barra chata temperada e revenida para aplicação em feixes de mola
(Universidade Federal de Minas GeraisUFMG, 2005-06-02)
This dissertation aimed to evaluate the effect of niobium addition on the mechanic properties and structure of quenched and tempered flat bars applied to springs. Three different heats of ABNT 5160 steel were sampled with ...
Utilização de poliacrilamidas de alto peso molecular na flotação catiônica reversa de minério de ferro
(Universidade Federal de Minas GeraisUFMG, 2004-09-17)
Flotation is an important iron ores concentration process. A major problem occurring in the concentrators is the low metallurgical recovery associated mainly with the fine size fraction. In this work, the utilization of ...
Levantamento da cinética de revenimento de um aço-carbono ligado ao V, B, Cr, Ni e Mo
(Universidade Federal de Minas GeraisUFMG, 2010-07-01)
The effects of temperature and time on the kinetics of tempering has been evaluated by hardness, tensile and Charpy V-notch tests of specimens quenched and tempered in the range 580 to 680°C. Johnson, Mehl and Avramis ...
Avaliação de metodologias de simulação física do processo desinterização
(Universidade Federal de Minas GeraisUFMG, 2012-05-07)
The process of agglomeration of particles is crucial for the successful production of steel by blast furnace. The sintering stands out among the processes of agglomeration due to the greater flexibility of this process. ...
Efeito da textura metalúrgica na resistência a abrasão de aços ao manganêsEffect of metallurgical texture on the abrasion resistance of Mn steels
(Universidade Federal de UberlândiaBrasilPrograma de Pós-graduação em Engenharia Mecânica, 2018)
Análise e caracterização do polietileno de ultra-elevado peso molecular para aplicação em prótese total de joelho
(Universidade Federal de Minas GeraisUFMG, 2006-09-13)
The aim of this study was to characterize and also to compare two samples of ultra high molecular weight polyethylene (UHMWPE) useful in total knee replacement using Fourier Transform Infrared Spectroscopy (FTIR), X-Ray ...
Modelagem da precipitação de AIN em aços elétricos de grão orientado
(Universidade Federal de Minas GeraisUFMG, 2011-04-04)
Electrical steels have been widely used in the construction of motors and transformers because of the lower energy losses when compared to common steel. Since the second half of the twentieth century, grain-oriented ...
Desenvolvimento de escórias de refino secundário para o forno panela da V&M do Brasil
(Universidade Federal de Minas GeraisUFMG, 2011-02-25)
In order to attend the growing demand for steel with high cleanliness at competitive prices, the V&M do BRASIL company invested in development of knowledge related to the slags used in the secondary refining. At V&M do ...
"Modelo multidimensional de avaliação do desgaste de cadinho de alto-forno
(Universidade Federal de Minas GeraisUFMG, 2007-12-06)
Blast furnace campaign has been determined by hearth refractory line lifetime, this way, it is very important a systematic follow up of wearing evolution, to plan blast furnace revamp. It is tried with that to avoid to ...