Ductile Cast Iron
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Estudio del comportamiento de fundición CADI sometida a FCR
ABSTRACT Ductile Iron (DI) is a development of the iron alloys introduced in the ´50s, with free graphite in the form of nodules. Austempered Ductile Iron (ADI) is a development of DI later introduced, consisting on austempering heat treatment in order to obtain a high strength and high toughness material. Carbidic Austempered Ductile Iron (CADI) is a more
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Influence of casting heterogeneities on microstructure and mechanical properties of austempered ductile iron (ADI)
ABSTRACT An investigation was carried out to examine the influence of as-cast heterogeneities on the resulting microstructure and mechanical properties of an austempered ductile cast iron (ADI). A commercial hypereutectic ductile iron alloy with 3.59% C, 2.68% Si, 0.24% Mn and 0.46% Cu (in wt. %) was produced in a coreless induction furnace. The specimens we
Matéria (Rio J.). Publicado em: 10/08/2017
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3. Quenching and partitioning heat treatment in ductile cast irons
A commercial ductile iron alloy was submitted to a quenching and partitioning heat treatment. Samples were austenitized at 900 ºC for two hours, quenched at 160 ºC and kept at this temperature for 2 minutes and finally were re-heated at temperatures between 300 and 450 ºC during time intervals between 2 and 180 minutes. The microstructural evaluation was
Mat. Res.. Publicado em: 26/10/2014
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4. An analysis of the machinability of ASTM grades 2 and 3 austempered ductile iron
Austempered Ductile Iron (ADI) is a ferrous material that was first fabricated in the second half of last century, therefore a relatively new material compared to steel, which has been used for different applications by mankind for some millennia now. ADI ;s mechanical properties, such as its strength-to-weight ratio, which has proven to outperform that of f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/08/2011
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5. Análise de manufatura e de produto para a utilização do ferro fundido austemperado ADI grau 3 em eixo comando de válvulas de motores Diesel / Product and manufacturing analysis of austempered ductile iron ADI grade 3 using for Diesel engine camshaft
The austempered ductile iron grade 3 was investigated as a substitute to SAE 1045 forged steel quenched &tempered in Diesel engines camshaft application. The mechanical properties for both materials were compared in laboratory tests and in the literature. The main mechanical property studied was the wear resistance. The microstructure, chemical composition w
Publicado em: 2010
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6. Influência da deformação superficial induzida na resistência à fadiga do ferro fundido nodular austemperado
The austempered ductile iron (ADI) is stronger, lighter and cheaper than forged carbon steels. In addition, ADI displays a higher ductility, toughness and resistance to wear than other cast irons. This work presents an analysis of the effect of induced superficial deformation on the fatigue resistance of ADI and it was studied the possibility to reduce the t
Publicado em: 2010
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7. Parametros termicos e estruturais em ferros fundidos cinzento e nodular solidificados em moldes de areia e unidirecionalmente / Thermal and structural parameters in gray and ductile cast irons solidified in sand molds and under unidirectional conditions
In the present work unsteady state unidirectional solidification of a hypoeutectic gray cast iron and of a eutectic ductile cast iron is applied to analyze the influence of the process parameters an the flake and nodule count. For comparison purpose some samples were cast in sand molds. The experimental results of temperature variation in the casting were us
Publicado em: 2009
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8. Furação de ferros fundidos austemperados e nodular perlítico / Machinability of Austempered Ductile Irons and Pearlitic Ductile Iron in Drilling Process
Many materials have mechanical proprieties improved by heat treatments, but this can cause changes in the structure of the material, worsening its machinability, as in the case of austempered ductile iron (ADI) that despite of presenting better mechanical proprieties it has lower machinability when compared with the conventional ductile iron and steel of sim
Publicado em: 2009
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9. Influência do número de nódulos de grafita nas propriedades mecânicas do ferro fundido nodular austemperado
In recente years, austempered ductile cast irons (ADI) has emerged as a major engineering material because of its excellent mechanical properties. These properties, as result of a microestructure containing spheroidal graphite and ausferrite, include high strength, ductility, toughness, good wear resistance and machinability. Through the years, the study of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/10/2005
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10. The "quenching and partitioning" process: background and recent progress
A new process concept, "quenching and partitioning" (Q&P) has been proposed recently for creating steel microstructures with retained austenite. The process involves quenching austenite below the martensite-start temperature, followed by a partitioning treatment to enrich the remaining austenite with carbon, thereby stabilizing it to room temperature. The pr
Materials Research. Publicado em: 2005-12
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11. Residual analysis applied to S-N data of a surface rolled cast iron
Surface rolling is a process extensively employed in the manufacture of ductile cast iron crankshafts, specifically in regions containing stress concentrators with the main aim to enhance fatigue strength. Such process hardens and introduces compressive residual stresses to the surface as a result of controlled strains, reducing cyclic tensile stresses near
Materials Research. Publicado em: 2005-09
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12. The effect of surface rolling on fatigue behavior in a pearlitic ductile cast iron / "Influência do roleteamento no comportamento em fadiga de um ferro fundido nodular perlítico"
Surface rolling is a mechanical treatment commonly used in parts fabricated with steel and ductile cast iron, specifically in stress concentration regions, to improve fatigue properties. This process hardens and introduces compressive residual stresses to the surface of the material through the application of controlled strains, thus provoking a reduction of
Publicado em: 2002