Electrical Steel
Mostrando 1-12 de 85 artigos, teses e dissertações.
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1. Efeito da Adição de Propileno aos Gases de Proteção Convencionais na Soldagem GMAW Aplicada a Juntas de Topo e Ângulo
Resumo O presente trabalho teve por objetivo avaliar a adição de 1,3% de C3H6 ao CO2 puro e 0,6% de C3H6 à mistura de Ar+25%CO2, na soldagem de aço carbono utilizando o processo Gas Metal Arc Welding (GMAW) aplicado em juntas de topo com chanfro em V e ângulo em T. As soldas foram realizadas utilizando chapas de aço SAE 1020, arame de solda ER70S-6 de
Soldag. insp.. Publicado em: 02/12/2019
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2. Phase Separation and Development of the Microstructure for Stainless Steel to Copper Alloy Weld Joints Using a Fiber Laser
ABSTRACT Stainless steel and copper alloys joints are often applied in aerospace, marine and power industries where both high thermal and electrical conductivity (Cu) and corrosion resistance (steel) are required. In the aerospace industry, in particular for the combustion chamber of rocket engines, copper and steel combinations offer perfect materials selec
J. Aerosp. Technol. Manag.. Publicado em: 10/10/2019
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3. Análise da geração de energia elétrica por meio da utilização de conversores do tipo TEG em lingotamento contínuo de aços
RESUMO A fabricação do aço é um processo que requer enormes quantidades de recursos, como por exemplo combustíveis, minério de ferro, carvão, entre outros. Com a crescente preocupação com o meio ambiente, seja pelas cargas ambientais ou pelo aquecimento global, cresce também a necessidade do desenvolvimento de novas tecnologias que possibilitem um
Matéria (Rio J.). Publicado em: 16/09/2019
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4. Improvement of Texture and Magnetic Properties in 4.5 wt.% Si Grain-Oriented Electrical Steels
4.5 wt.% Si grain-oriented electrical steel sheets were successfully produced by hot rolling, normalizing, warm rolling and annealing, and texture evolution was investigated using macro- and micro-texture analysis. It is found that the recrystallization texture of sheets is very sensitive to the warm rolling reduction, and 83-87% warm rolling reductions are
Mat. Res.. Publicado em: 19/08/2019
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5. Investigação da corrosão eletrolítica em telhas de aço recobertas com zincalume
RESUMO As telhas de aço usadas em galpões de fazendas expostas às intempéries ficam vulneráveis à degradação. A corrosão surge devido à diferença de potencial elétrico entre a superfície metálica e o meio, levando a um carregamento elétrico dessa superfície. Elas então necessitam da proteção de um recobrimento anticorrosivo, cujo objetivo
Matéria (Rio J.). Publicado em: 20/05/2019
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6. Magnetic Aging, Anomalous and Hysteresis Losses
In this study the magnetic aging effect on anomalous and hysteresis loss was investigated, as well as its effect on domain morphology. For this purpose, non-oriented fully processed electrical steel with 2.3 wt.%Si - 79 ppm C and non-oriented semi-processed electrical steel annealed at 750 °C for 5 hours with 0.4 wt.%Si - 340 ppm C were aged at 150 °C. The
Mat. Res.. Publicado em: 21/03/2019
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7. Nickel-Titanium Alloys Welding of Thin Sheets Using GTAW: Comparative Study Between Similar and Dissimilar Welding with AISI 304 Stainless Steel
The objective of the present work was to evaluate welding of thin sheets (thickness < 1 mm) of similar and dissimilar NiTi alloys with AISI 304 stainless steel using the Gas Tungsten Arc Welding (GTAW) process and to study the mechanical and metallurgical properties of the joints with and without post-welding heat treatment (PWHT). The GTAW process was chose
Mat. Res.. Publicado em: 08/11/2018
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8. Protection of Grid Connected Photovoltaic Systems (GCPVS)
ABSTRACT Installations of photovoltaic systems connected or not to the electrical network have become increasingly popular, but it is often carried out by unqualified people using low quality components. The present study aims to describe the methodology adopted for the protection of grid connected photovoltaic systems (GCPVS) and the implications caused by
Braz. arch. biol. technol.. Publicado em: 29/10/2018
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9. Método innovador de ensayos de impacto en altas temperaturas aplicado en aceros al carbono
ABSTRACT In this paper, an innovative method of impact tests at high temperature on sub-size Charpy V notched specimens is applied. The innovation lies in the method of heating the specimen, which is performed in situ on a Charpy impact machine type by alternating electrical current through the specimen. The specimens are heated in a few seconds (v=32 ºC/s)
Matéria (Rio J.). Publicado em: 19/07/2018
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10. Evaluation of recycled MgO-C bricks and dead-burned dolomite fines in setting slag foaming in the electric arc furnace
Abstract Production cost reduction for the Electric Arc Furnace (EAF) technology is strongly dependent on the efficiency of the electrical energy being introduced into the metal bath. Besides EAF technology, the slag foaming process is currently applied to some other equipment for steel production aiming to save energy, productivity improvements, enhance the
REM, Int. Eng. J.. Publicado em: 2018-03
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11. Kinetics of Magnetic Ageing of 2%Si Non-oriented Grain Electrical Steel
The effect of carbon content on the magnetic ageing index and Vickers hardness evolution on annealed samples of 2%Si non-oriented grain electrical steel was studied. Samples with 40 and 60ppm carbon content were subjected at ageing temperatures of 200 and 225ºC, respectively. During the ageing treatment, the cycle was interrupted on several time intervals i
Mat. Res.. Publicado em: 23/10/2017
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12. Experimental Investigation of Ionization Sensors under Shock Tube Stagnation Conditions
ABSTRACT: Recently, there has been a growing interest in studies concerning ionization sensors for aerospace applications, power generation, and fundamental research. In aerospace research, they have been used for studies of shock and detonation waves. Two key features of these sensors are their short response time, of the order of microseconds, and the fact
J. Aerosp. Technol. Manag.. Publicado em: 2017-06