Carburizing
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Characterization of Different Surface Layers Produced by Solid Boron-Nitro-Carburizing Thermochemical Treatment on AISI 1020
The aim of this study is to obtain and characterize surface layers on low carbon steel with the pack boron-nitro-carburizing process. Different mixtures of commercial powders (Turbonit® and Ekabor®) were used to investigate the case properties, microstructure and phases formation on AISI 1020 steel. A series of experiments were conducted in solid medium wi
Mat. Res.. Publicado em: 04/11/2019
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2. 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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3. Wear resistance of AISI 304 stainless steel submitted to low temperature plasma carburizing
Abstract Despite the AISI 304 stainless steel has high corrosion/oxidation resistance, its tribological properties are poor, being one of the barriers for use in severe wear applications. Thus, there is a wide field for studying technologies that aim to increase the surface hardness and wear resistance of this material. In this work, hardness and wear resist
REM, Int. Eng. J.. Publicado em: 2017-09
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4. AISI 1005 Steel Plasma Treated by Different Thermochemical Surface Treatments
Abstract To modify the surface structure of AISI 1005 steel and its properties without any dimensional loss, different plasma surface treatments were performed at low temperatures (500 ºC) in this study. The samples were subjected to single plasma treatments including: nitriding (N5% and N3%), carburizing (CE) and ferritic nitrocarburizing (NC) and to duple
Mat. Res.. Publicado em: 01/08/2016
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5. 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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6. Low-temperature Plasma Assisted Thermochemical Treatments of AISI 420 Steel: Comparative Study of Obtained Layers
Formation of metastable C–, N–, or even Formation of metastable C–, N–, or even C/N– expanded phases can be observed for typical non-equilibrium conditions attained at the plasma assisted thermochemical treatments when temperatures relatively low are used. In present work, kinetics data are considered in a comparative study comprising low-temperatu
Mat. Res.. Publicado em: 03/11/2015
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7. Plasma Carburizing of Sintered Pure Iron at Low Temperature
In this work, plasma carburizing of sintered pure iron at low temperature was investigated. Samples were carburized under a dc abnormal glow discharge in two mixed atmospheres (5%CH4 + 95%H2 and 20%CH4 + 80%H2) at 500 °C and 700 °C for 3 and 6 hours. The influence of these parameters was investigated by Scan Electron Microscopy (SEM), X-ray Diffraction (DR
Mat. Res.. Publicado em: 2015-04
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8. XPS, XRD and laser raman analysis of surface modified of 6150 steel substrates for the deposition of thick and adherent diamond-like carbon coatings
Although the 6150 steel has an excellent fatigue and impact resistance, it is unsuitable to operate it when the corrosion is a limited factor. We propose here a sequence of steel pre-treatment by carburizing, carbonitriding and nitriding in order to improve the poor adhesion between Diamond Like-Carbon coatings on steel. This sequence is our attempt to reduc
Mat. Res.. Publicado em: 25/02/2013
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9. Avaliação metalúrgica e mecânica de aços cementados e temperados de forma convencional e intensiva
Steels treated through carburizing, quenching and tempering are broadly used in components that need to have hardness and superficial mechanical resistance together with a good toughness at the core of the component. Intensive quenching is a method that presents some advantages, such as the possibility of avoiding cracking due to extreme cooling, the increas
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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10. 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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11. Influencia do teor de carbono na propagação de trinca por fadiga e na tenacidade a fratura em camada cementada em aços de alta resistencia mecanica / Influence of the carbon content on propagation in cracks of fadigue and on fracture toughness in carburized case in high strenght steels
Este trabalho propõe uma metodologia para avaliar pontualmente as variações de tenacidade à fratura e taxa de crescimento de trinca de fadiga ao longo da camada cementada de um aço SAE 4320. A pequena espessura dessas camadas impede a retirada de corpos de prova nas dimensões especificadas pelas normas de ensaios de tenacidade à fratura. Assim, para s
Publicado em: 2008
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12. Combined Micro-Hardness and Eddy Currents Applied to the Study of Steel Decarburizing
Carbon is the most important element going in the steels composition since it largely contributes to their mechanical performance. During the heat treatment of steels, a part of atoms of carbon could be removed from the superficial zone of the steel, which is the result of the atmospheric oxygen attraction by forming gaseous carbon monoxide. This phenomenon,
Matéria (Rio J.). Publicado em: 2006