Electric Arc
Mostrando 1-12 de 66 artigos, teses e dissertações.
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1. Fundente para Recargue por Soldadura con Arco Sumergido a Partir de Ferrocromo-manganeso y Escoria de la Reducción Simultánea de Cromita y Pirolusita
Abstract The obtaining of a flux for hardfacing by Submerged Arc Welding (SAW), using ferrochrome-manganese and slag obtained from the simultaneous carbothermal reduction of chromite and pyrolusite is addressed. The ferrochrome-manganese and the slag were obtained, conceiving that both products satisfy the requirements of the components (alloy system and ma
Soldag. insp.. Publicado em: 24/10/2019
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2. Influência da composição do gás de proteção nas tensões residuais de juntas de aço DP600 soldadas pelo processo GMAW
RESUMO A indústria automobilística vem investindo em novos processos de fabricação que melhoram a produtividade sem perda da qualidade. Entretanto, a presença de tensões residuais, geradas em todos os processos de fabricação, constitui um dos grandes problemas encontrados na indústria metal mecânica, pois estas podem se somar às tensões de carreg
Matéria (Rio J.). Publicado em: 16/09/2019
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3. Effect of Electric Pulse Treatment on the Corrosion Resistance of HAl52-2 Aluminum Brass
In this work, the effects of electric pulse treatment (EPT) on the corrosion resistance of HAl52-2 aluminum brass has been investigated using electrochemical workstation, scanning electron microscope and X-ray diffraction. The results have shown that after EPT, the corrosion potential increased and the corrosion current density decreased. At the same time, t
Mat. Res.. Publicado em: 19/08/2019
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4. Influência da composição do gás de proteção nas tensões residuais de juntas de aço DP600 soldadas pelo processo GMAW
RESUMO A indústria automobilística vem investindo em novos processos de fabricação que melhoram a produtividade sem perda da qualidade. Entretanto, a presença de tensões residuais, geradas em todos os processos de fabricação, constitui um dos grandes problemas encontrados na indústria metal mecânica, pois estas podem se somar às tensões de carreg
Matéria (Rio J.). Publicado em: 20/05/2019
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5. Uma Metodologia para Análise da Distribuição de Contagem dos Picos de Tensão de Reignição para Avaliação da Estabilidade do Processo GMAW Curto-Circuito
Resumo A estabilidade do arco tem sido estudada através de análises estatísticas obtidas dos sinais de tensão de arco e corrente de soldagem. Histogramas e cálculo de estatísticas dos parâmetros tempo de arco aberto e tempo de curto circuito são meios de avaliação da estabilidade dos processos de soldagem. Contudo, estudos relacionados aos picos de
Soldag. insp.. Publicado em: 09/05/2019
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6. Contrastive Research on Electrical Contact Performance for Contact Materials of Cu-SnO2 and Cu-ZnO2 Alloys
Herein, SnO2- and ZnO2-doped (1.5 wt.%) composite Cu powder was prepared by mechanical alloying (MA) respectively, and both the contact materials of oxide-doped Cu alloys were subsequently obtained by canned hot-pressing powder sintering with hot extrusion combined. Scanning electron microscopy (SEM), laser scanning confocal microscopy (LSCM) and self-design
Mat. Res.. Publicado em: 25/04/2019
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7. Use of electric arc furnace slag for producing concrete paving blocks
Resumo A escória de forno elétrico foi usada como substituto do agregado graúdo natural na produção de peças de pavimentação de concreto. O traço de concreto 1:2:3:0,51 (cimento:areia:agregado graúdo:água) foi definido para alcançar uma resistência à compressão de 35 MPa. Quatro grupos de concreto foram preparados: um traço referência e trê
Ambient. constr.. Publicado em: 2019-04
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8. Evaluation of zinc removal and compressive strength of self-reducing pellets composed of Electric Arc Furnace Dust
Abstract The amount of Electric Arc Furnace Dust (EAFD) is continuously increasing in mini-mill steel plants. This dust is considered a hazardous waste because of the presence of elements like lead, cadmium and chromium. Among many different treatment processes for this issue, there is the possibility of returning the EAFD back to the Electric Arc Furnace. T
REM, Int. Eng. J.. Publicado em: 2019-03
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9. Reduction of electric arc furnace dust pellets by mixture containing hydrogen
Abstract The large amount of dust generated in electric arc furnace aligned with its chemical composition makes this dust a potential source of iron in the direct reduction iron process. Thus, the aim of this research is to investigate the reduction of pellets produced with electric arc furnace dust using hydrogen as the reducing agent. The kinetic investiga
REM, Int. Eng. J.. Publicado em: 2019-03
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10. Microstructural, thermochemistry and mechanical evaluation of self-reducing pellets using electric arc furnace (EAF) dust containing zinc for Waelz process
ABSTRACT The increment of recycling of steel using electric arc furnace and the tendency to coat of steel products with zinc, in order to prevent corrosion, has increased the proportion of galvanized scrap used worldwide in the recent years. Approximately 10 to 20 Kg/t of cast steel is generated in casting arcs. These collected dusts electric arc furnace (EA
Matéria (Rio J.). Publicado em: 19/07/2018
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11. Carbothermic reduction of Electric Arc Furnace Dust via thermogravimetry
Abstract Electric Arc Furnace Dust (EAFD) is a solid waste originated from electric steelmaking furnaces. Currently, according to some authors, there is an estimated generation of 15 to 25 kg of dust per ton of steel produced. The formation of the dust is related to the following steps of the process: furnace charge, metal volatilization, iron vaporization u
REM, Int. Eng. J.. Publicado em: 2018-07
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12. Characterization of mineral wools obtained from ornamental rock wastes
Abstract The study aimed to characterize the mineral wools obtained from wastes of the cutting step of marble and granite, in order to evaluate the possibility of their use on an industrial scale. Mixtures of marble and/or granite wastes were prepared in order to reach the chemical composition of rock and glass wools. The batches were melted in an electric a
REM, Int. Eng. J.. Publicado em: 2018-07