Carburization
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Evaluación del uso de acetileno como fuente de carbono en la carburización de aceros
ABSTRACT The effect of using acetylene as a carbon source in the gas carburization of AISI/SAE 8620 steel was evaluated in this work. For this purpose, a gaseous carburizing system was designed and manufactured with the following characteristics: controlled production of a carburant gaseous atmosphere, inert and hermetic isothermal reaction zone and carbon/o
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Micro Abrasive Wear Behaviour Study of Carburization and Ion Plasma Nitriding of P20 Steel
P20 steel, which is mainly used in plastic molds, was thermochemically treated by ion plasma nitriding and solid and gas carburization. In this work, the solid and gas carburization were performed at 925 ºC for four different durations. The ion plasma nitriding was performed at 520 ºC for four different durations. The thermochemical treatment increased the
Mat. Res.. Publicado em: 29/04/2016
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3. Surface contact fatigue failure of a case hardened pinion shaft
An investigation was made to determine the causes of surface contact fatigue failure of a case hardened driver pinion located in the intermediate shaft of a reducer gearbox used in a sugar and alcohol mill. The examination of the component revealed the presence of a cemented layer substantially thicker than that generally specified for pinions devised for th
Mat. Res.. Publicado em: 20/05/2014
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4. Carburização na liga de aço inox HP modificada utilizada em fornos de pirólise / Carburization in HP-modified steel alloy used in pyrolysis furnaces
Os fornos de pirólise, feitos a partir da liga HP modificada, são equipamentos destinados à produção de hidrocarbonetos leves na indústria petroquímica. A partir da pirólise, é possível obter etileno e outros produtos que são matérias-primas para obtenção de manufaturados formados por polímeros. Nesse processo, grandes moléculas de hidrocarbo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/10/2012
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5. Effect of slag composition on iron nuggets formation from carbon composite pellets
Iron-carbon nuggets can be obtained by high temperature reduction of iron ore by carbonaceous material when both are agglomerated together as a carbon composite pellet. During this process, the stable oxides contained in the materials will form a slag. This work investigates the effect of this slag composition on iron nugget formation. Pellets were prepared
Materials Research. Publicado em: 2010-06
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6. Effects of carburization time and temperature on the mechanical properties of carburized mild steel, using activated carbon as carburizer
Due to the complexity of controlling parameters in carburization, there has been relatively little work on process variables during the surface hardening process. This work focuses on the effects of the carburizing temperature and time on the mechanical properties of mild steel carburized with activated carbon, at 850, 900 and 950 ºC, soaked at the carburiz
Materials Research. Publicado em: 2009
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7. DEVELOPMENT OF A COMPUTATIONAL TOOL FOR OPTIMIZATION AND VALUE IN USE FORECAST FOR IRON ORE PELLETS THROUGH THE DIRECT REDUCTION: ELECTRIC STEELMAKING ROUTE / DESENVOLVIMENTO DE UM MODELO COMPUTACIONAL DE OTIMIZAÇÃO E PREDIÇÃO DO VALOR DE USO DE PELOTAS DE MINÉRIO DE FERRO NA ROTA REDUÇÃO DIRETA: ACIARIA ELÉTRICA
The study at issue searched for developing an innovative tool able to effectively analyze and optimize the industrial usage of iron ore pellets undergoing traditional gas-based direct reduction processes. The creation of a thermochemical model for MIDREX process was proposed and carried out by PUC-Rio, taking into account relevant characteristics related to
Publicado em: 2007
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8. CARBURIZAÇÃO DE FERRO ESPONJA NA ZONA DE REDUÇÃO DE UM FORNO MIDREX / DRI CARBURIZATION IN THE REDUCTION ZONE OF A MIDREX FURNACE
O presente trabalho apresenta uma análise do fenômeno de carburização na zona de redução de um forno de cuba tipo Midrex. É realizada uma análise dos principias trabalhos existentes na literatura, é apresentado o aparato experimental, a caracterização das amostras e os resultados obtidos. Os experimentos foram efetuados com o auxilio da ferramenta
Publicado em: 2005
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9. Assessing corrosion in oil refining and petrochemical processing
This paper summarizes the development of an information system used to manage corrosion of metals and alloys by high temperature gases found in many different oil refining, petrochemical, power generation, and chemical processes. The database currently represents about 7.9 million h of exposure time for about 5,500 tests with 89 commercial alloys for a tempe
Materials Research. Publicado em: 2004-03
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10. DECOMPOSITION OF HYDRAZINE BY TUNGSTEN OXYCARBIDES: THE INFLUENCE OF MACROPOROSITY AND MECHANICAL STRENGTH ON A 2 N MICROTHRUSTER ENGINE
The aim of this work was to prepare tungsten oxycarbides by Temperature Programmed Reaction (TPR), starting with previously molded macroporous tungsten oxide (WO3). The tungsten oxycarbides were prepared by one of two different methods: direct carburization with CH4/H2 to obtain WC or preliminary formation of nitrides with NH3 to obtain W2N, followed by carb
Brazilian Journal of Chemical Engineering. Publicado em: 2001-12