Steel Making
Mostrando 13-24 de 59 artigos, teses e dissertações.
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13. Desenvolvimento de um método para levantamento de tecnologias de materiais empregados no trem de força automotivo (powertrain) a partir de patentes / Devolopment of a patent based method for surveying materials technologies used in automotive powertrain
This research approaches the study from patents of technologies for materials used in power train of motor vehicles, to provide additional information in order to support decision making in this universe, especially in the selection of materials and their processing. The powertrain is currently the most important subsystem in a car, being appointed as chief
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/05/2012
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14. Does the contact time of alginate with plaster cast influence its properties?
The aim of this study was to verify the influence of the time of contact between alginate and gypsum after the modeling procedure on the properties of the plaster cast, such as surface detail, dimensional stability and microhardness. Thirty cylindrical specimens of orthodontic gypsum Type III were made by means of impressions of a stainless steel master mode
Brazilian Oral Research. Publicado em: 20/03/2012
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15. O problema siderúrgico nacional na Primeira República / The national steel-making problem in the First Republic
O debate sobre o problema siderúrgico nacional no Brasil ganhou corpo no final da década de 1900 e estendeu-se até 1941, com a criação, pelo governo federal brasileiro, da Companhia Siderúrgica Nacional (CSN) para construir e explorar a usina siderúrgica de Volta Redonda, que foi saudada como a solução do problema, encerrando assim um debate de mais
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2011
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16. Utilização da técnica de análise de risco para o gerenciamento de riscos nas paradas de altos fornos de uma usina siderúrgica verificação crítica da implantação das melhorias planejadas pela empresa
O gerenciamento de risco de acidentes do trabalho está cada vez mais ganhando importância no Sistema de Gestão de Saúde e Segurança Ocupacional (SGSSO) visto que esta ferramenta proporciona a identificação dos riscos que podem levar ao acidentes do trabalho ou às doenças ocupacionais. Além disso, como resultado da aplicação, o gerenciamento de ri
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/06/2011
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17. Caracterização da resistência à corrosão de ligas inoxidáveis Fe-Mn-Si-Cr-Ni-(Co) com efeito de memória de forma / Characterization of the corrosion resistance of Fe-Mn-Si-Cr-Ni-(Co) Shape memory stainless steels
In this work, the corrosion behavior of three Fe-Mn-Si-Cr-Ni(Co) shape memory stainless steels (SMSS) in aggressive environments was characterized. The electrochemical corrosion behavior in 0.5 M H2SO4 solution was obtained by potentiodynamic polarization, linear polarization, potential decay curves, electrochemical impedance spectroscopy (EIS), and Mott-Sch
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/03/2011
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18. Manufatura flexível: comparativo entre o modelo otimizado e o tradicional. / Flexible manufacture: comparative degree between the optimized model and the traditional one.
This work aims to optimize the machining process by reducing setup time and adjusting the consumption of cutting tools in a flexible manufacturing scenario, adopting an optimized model, which is then confronted with the traditional model, to show the advantages of one over the another. The tests consisted in making the turning operation of thinning on a CNC
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/03/2011
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19. InfluÃncia do Teor de Cromo e MolibdÃnio na Microestrutura e na Textura de Ligas Fe-Cr-Mo / INFLUENCE OF CONTENT OF CHROMIUM AND MOLYBDENUM MICROSTRUCTURE AND TEXTURE IN ALLOY Fe-Cr-Mo
The effects of chemical composition on texture and microstructure of five Fe-Cr-Mo alloys with 17%, 15% and 9% chromium contents and 5%, 7% and 9% molybdenum contents were investigated. The thermodynamic study of alloys for all investigated compositions showed the presence of secondary phases such as Mu (μ), Chi (χ), Sigma (σ) and a ferritic m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/07/2010
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20. Feed forward neural network for prediction of end blow oxygen in LD converter steel making
A multi layered feed forward neural network model is being developed for the prediction of end blow oxygen in the LD converter using a two step process. In the first step intermediate stopping temperature is being predicted and using this as an input the end blow oxygen is predicted. In both the cases two hidden layers had given the best results compared to
Materials Research. Publicado em: 2010-03
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21. A GESTÃO DA LIQUIDEZ E O SEU REFLEXO NA RENTABILIDADE DAS EMPRESAS PERTENCENTES À BOVESPA ENTRE OS ANOS DE 1999 E 2008 / MANAGEMENT OF LIQUIDITY AND ITS REFLECTION IN THE PROFITABILITY OF COMPANIES BELONGING TO BOVESPA BETWEEN THE YEARS 1999 AND 2008
One of the most problems faced by the financial manager is to maintain a balance between resources and applications of short and long term. Working Capital Management appears as a tool to improve the profitability of the company without representing a loss in their ability to pay. This study aims to evaluate if the financial performance achieved by companies
Publicado em: 2010
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22. Carvão vegetal e siderurgia: de elo perdido a solução para um mundo pós-Kyoto / Charcol based iron &steelmaking: from primitive technological model to solution for a post-Kyoto world
In a global-warming-frightened world, the positive carbon balance of charcoal-based iron &steel making recovers it from a past outshined by the dominance of the large fossil fuel mills. Nevertheless, the risk of not being able to profit from the global decarbonization consensus is material, owing to the dependency on deforestation. This is true even being th
Publicado em: 2009
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23. Estudo de uma metodologia baseada na utilizacao de ferramentas de simulacao numérica aplicadas às áreas de manutenção
Maintenance area has striven for new work methods as an approach to support the growing demand of expansions and diversification in national Steelmaking Production. In this context, it has searched an increase of equipment lifetime and fault analysis through the employment of tools which have been, up to this time, more commonly used in the field of project
Publicado em: 2009
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24. Desenvolvimento de blocos confeccionados com escória proveniente da reciclagem do aço / Development of blocks made with slag from steel recycling
This reasearch aims at evaluating the use of slag from steel making in the production of self-supported blocks for masonry. The largest residual volume generated from the steel making process is the slag, which is used for cement production and paving of roads. There is a lot of researches and papers issued about such subjects. However, the use of slag to ma
Publicado em: 2008