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Doctoral Thesis
DOI
10.11606/T.3.2003.tde-07052003-130638
Document
Author
Full name
Marcia Marie Maru
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2003
Supervisor
Committee
Tanaka, Deniol Katsuki (President)
Aoki, Idalina Vieira
Prata, Alvaro Toubes
Souza, Roberto Martins de
Tomanik, Antonio Eduardo Meirelles
Title in Portuguese
Estudo do desgaste e atrito de um par metálico sob deslizamento lubrificado.
Keywords in Portuguese
atrito
carregamento mecânico
contaminante abrasivo
desgaste
lubrificação mista
lubrificante parafínico
movimento oscilatório
movimento rotativo
Abstract in Portuguese
Este trabalho trata de um estudo experimental das respostas de desgaste e de atrito encontradas em um sistema deslizante lubrificado. Para tanto, foram realizados ensaios de deslizamento em um equipamento para ensaios de desgaste, adotando-se o dispositivo pino-contra-disco, para ensaios com movimento relativo rotativo contínuo entre as amostras, e o dispositivo pino-contra-placa, para ensaios com movimento relativo alternado, ou oscilatório, entre as amostras. Os materiais metálicos ensaiados foram pinos de aço AISI 52100 e contra-corpos de aço AISI 8640. O óleo lubrificante foi o mineral de base parafínico, IV 100. Foram variadas as condições de aditivação e de contaminação do óleo lubrificante e foram utilizados dois níveis de carregamento mecânico, determinada pela relação velocidade/carga. O desgaste foi estudado por microscopia óptica e eletrônica de varredura, medição da área afetada pelo desgaste, perfilometria das superfícies desgastadas e análise de óleo. O atrito e o potencial de contato foram monitorados ao longo dos ensaios. Os resultados obtidos mostraram que o desgaste dos corpos metálicos foi sensível ao carregamento mecânico, à aditivação e à contaminação do óleo. Diferenças foram notadas nas morfologias superficiais entre os resultados de desgaste dos ensaios rotativos e oscilatórios.
Title in English
Study on the wear and the friction of a metallic pair under lubricated sliding.
Keywords in English
abrasive contaminant
friction
mechanical loading
mixed lubrication
paraffinic oil
reciprocating movement
rotating movement
wear
Abstract in English
This work concerns with experimental study of wear and friction responses of lubricated sliding system. Sliding tests were carried out using pin-on-disk wear testing machine for tests with continuous rotating movement, and the pin-on-plate device, for reciprocating tests between specimens. The metallic test coupons were AISI 52100 steel pins and AISI 8640 steel counter-faces. The used lubricant was paraffinic mineral oil, VI 100. The presence of additives and contamination in the lubricant oil were investigated under two mechanical loading levels, determined by the velocity/load relation. The wear was studied by means of optic and scanning electronic microscopes, perfilometry and dimensional analysis of the worn surfaces and oil analysis. The friction and the contact potential were monitored through out the sliding tests. The results showed that the wear of the metallic materials was susceptible to the mechanical loading, the additive and the contamination existence in the oil. It was observed differences among the wear results of the rotating and the reciprocating tests in terms of surface morphologies.
 
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0_pre_texto.PDF (56.10 Kbytes)
cap1_intro.pdf (241.99 Kbytes)
cap2_rev_bib.pdf (9.93 Mbytes)
cap3_mat_metodos.pdf (12.96 Mbytes)
cap4_resultados.PDF (82.10 Mbytes)
cap5_discussao.PDF (853.76 Kbytes)
cap6_conclusoes.PDF (17.88 Kbytes)
pos_texto_AnexoB.pdf (355.71 Kbytes)
pos_texto_AnexoC.pdf (26.37 Kbytes)
pos_texto_AnexoD.pdf (9.75 Mbytes)
pos_texto_AnexoE.pdf (9.04 Kbytes)
referencias.PDF (23.08 Kbytes)
Publishing Date
2003-05-14
 
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