• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Master's Dissertation
DOI
10.11606/D.88.2016.tde-15092016-142341
Document
Author
Full name
Luiz Paulo Cadiolli
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1998
Supervisor
Committee
Crnkovic, Ovídio Richard (President)
Casteletti, Luiz Carlos
Gregolin, José Ângelo Rodrigues
Title in Portuguese
Estudo para viabilização da cementação gasosa através da dissociação do etanol diluído com gás nitrogênio
Keywords in Portuguese
Álcool etílico
Atividade de carbono
Cementação gasosa
Coeficiente de velocidade de transporte de carbono (β)
Abstract in Portuguese
Devido a necessidade de redução do consumo dos derivados de petróleo, faz-se necessária a procura da substituição destes por outras fontes viáveis no processo de cementação. Este trabalho apresenta um estudo para viabilização da cementação gasosa através da dissociação do álcool etílico diluído com gás nitrogênio. Foram feitos estudos termodinâmicos, com base em análise química das amostras dos gases retiradas do forno, analisados por um infra vermelho. Com análise dos gases CO, CO2, CH4 pode-se determinar as atividades do carbono nos gases (ag) e o coeficiente de velocidade de transporte de carbono da atmosfera para a superfície metálica (β), nas temperaturas de 870ºC, 900ºC, 930ºC, sendo que as atmosferas cementantes nestas temperaturas foram diluídas com diferentes porcentagens de gás nitrogênio. Com os resultados foi possível concluir que as diluições não interferiram no potencial de carbono, mas foi a grande responsável na diminuição no tamanho das camadas cementadas.
Title in English
Viability study of carburizing dissociation of ethanol diluted in nitrogen
Keywords in English
Carbon activity
Carbon coefficient of transport velocity (β)
Ethyl alcohol
Gas carburizing
Abstract in English
Nowadays, due to the need of reduction of the consume of petroleum derivative products, the substitution of these products for others sources is really necessary. This work presents a viability study of carburizing dissociation of ethanol diluted in nitrogen study gas. Thermodynamics studies were carried out with chemical analysis of gas samples from furnace using infrared analyser. CO, CO2 and CH4 gas analysis were used to determine the gas carbon activity (ag) and the carbon coefficient of transport velocity from atmosphere to the metallic surface (β), for the temperature of 870°C, 900°C and 930°C. The carbuzing atmosphere for these temperatures were diluted with different percentages of nitrogen gas. With carbon potential, but it was the mean responsible for the size reduction of case carburized.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2016-09-15
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2021. All rights reserved.