Grey Cast Iron
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Microstructural Evolution and Phase Transformation in Laser Cladding of Cr and Mo Powder on Grey Cast Iron: Mixture Design of Experiment (DOE)
Laser cladding on grey cast iron at high power processing was investigated for microstructural evolution and phase transformation to enhance surface properties. Cladding was designed using a mixture of DOE with peak power (Pp) and pulse repetition frequency (PRF), and a mixture component of Cr and Mo ratio as factors. Microstructural findings indicated absol
Mat. Res.. Publicado em: 21/11/2017
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2. Transient Directional Solidification of Cast Iron: Microstructure Formation, Columnar to Equiaxed Transition and Hardness
A number of applications may require cast iron. Engine cylinder blocks, flywheels, gearbox cases, machine-tool bases may be manufactured by using grey cast iron while bearing surfaces with white cast iron. Thus, understanding the solidification behaviour of eutectic cast iron becomes an essential task, with certain points to be accomplished. Transient direct
Mat. Res.. Publicado em: 31/05/2016
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3. Control of chilling tendency in grey cast iron reuse
In grey cast iron remelt and recycling, white iron can result in the cast product if careful control of the chilling tendency is not ensured. Many jobbing foundries are constrained in furnace types and available foundry additives that the operation always results in white irons. This study is towards ensuring grey iron is reproduced from cast iron scrap auto
Mat. Res.. Publicado em: 22/11/2012
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4. Crescimento de trincas em fadiga torsional / Fatigue crack growth in torsional fatigue
With increasing competition and reliability in modern equipment, is of vital importance to studies on the structural fatigue life in the time domain and frequency domain, the advance speed and cost reduction in computing greatly simplifies the prediction fatigue life. But it is also necessary to know the modes of fatigue crack growth, and its mechanisms. Aft
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/07/2011
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5. Uma contribuição ao fresamento frontal de superfícies irregulares em blocos de motores em ferro fundido cinzento / A contribuition to the face milling of irregular grey cast iron surface
Atualmente a competitividade das empresas é um objetivo que vem sendo buscado de forma bastante intensa. Por outro lado, fatores como o meio ambiente e a preocupação com o conforto e a saúde dos seus colaboradores também tem sido motivo de preocupação. Esses dois fatores são as vezes antagônicos e para conseguir atingi-los simultaneamente é necess�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/07/2011
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6. Estudo comparativo de diferentes geometrias de corte em broca de metal duro com canal reto em ferro fundido cinzento / Comparative study of different geometries cut with carbide drill straight flute in grey cast iron
O objetivo deste trabalho é comparar o desempenho de duas diferentes geometrias de brocas de metal duro sem cobertura, com canal reto e refrigeração interna, na furação de ferro fundido cinzento. As geometrias avaliadas nos experimentos foram a geometria de ponta normalizada (normal) e uma geometria desenvolvida chamada de geometria de ponta esférica.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/06/2011
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7. Influence of EP additive on tool wear in drilling of compacted graphite iron
Compacted Graphite Iron (CGI) is a good option for the manufacturing of engine blocks, because of the possibilities to decrease the wall thickness and to operate at higher pressures. However, due to its greater tensile strength and hardness compared with grey cast iron, the pearlitic CGI structure makes its machining more difficult. Thus, the aim of this pap
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-06
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8. Efeito do tamanho do abrasivo no desgaste de metais. / The effect of abrasive size on the wear resistance of metallic materials.
In this research, the effect of abrasive size on the wear resistance of five metallic materials was investigated. Abrasive wear tests using a pin test on alumina paper were carried out using abrasive sizes between 16 µm and 192 µm. The wear surface of the specimens was examined by scanning electron microscopy for identifying the wear micromechanism and the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/06/2010
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9. Performance of carbide and ceramic tools in the milling of compact graphite iron - CGI
Grey cast iron (GCI) is the most common material used in diesel engine blocks. However, to increase the pressures in the combustion chamber when this kind of alloy is used, it is necessary to increase the block wall thickness, what raises its weight and, consequently, does not fulfill the requirements. Thus, the compacted graphite iron (CGI) appears as an al
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
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10. Effects of addition of iron (Fe) filings to green moulding sand on the microstructure of grey cast iron
Cast irons are important engineering materials, which possess a wide range of attractive properties. Their properties are significantly dependent on the microstructure of the cast, cast iron components. A way of controlling the microstructure of cast iron is through the control of cooling rates during solidification. To control cooling rate mould properties
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-06
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11. Study of Tapping Operation of Compacted Graphite Iron With Cemented Carbide Tool / Estudo do processo de rosqueamento com macho de corte de metal duro em ferro fundido vermicular
The use of compacted graphite iron - CGI is growing in the automobile industry, replacing several components that usually are manufactured in grey cast iron. However, due to its poor machinability when compared to grey cast iron, the production cost sometimes is not competitive. Several research about machinability of CGI has already been developed, mainly i
Publicado em: 2009
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12. Uma contribuição a melhoria do processo de fresamento de ferro fundido vermicular - CGI / A contribution to the improvement of the milling process machining compacted graphite iron - CGI
Since the beginning of this century, researches about the development of diesel engines have been intensified, aiming to increase its energy efficiency and to reduce the levels of emission of pollutants. One the way to increase this efficiency is to increase the peaks of pressure of fuel explosion in the combustion chamber. The grey casting iron material is
Publicado em: 2009