Estudo do desempenho de nanolubrificantes no torneamento do aço-ferramenta AISI D6 temperado e revenido
Emulsions based on mineral oil are widely used in machining processes because their appropriate lubri-cooling properties. Nevertheless, the use of these cutting fluids has been questioned because they can cause damage to the environment and the workers’ health. This issue has motivated the emergen...
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Torneamento duro Aço-ferramenta AISI D6 Nanolubrificantes MQL |
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Torneamento duro Aço-ferramenta AISI D6 Nanolubrificantes MQL Carvalho, Éric Ramalho Ferreira de Estudo do desempenho de nanolubrificantes no torneamento do aço-ferramenta AISI D6 temperado e revenido |
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Emulsions based on mineral oil are widely used in machining processes
because their appropriate lubri-cooling properties. Nevertheless, the use of these
cutting fluids has been questioned because they can cause damage to the environment and the workers’ health. This issue has motivated the emergence of regulating
laws to limit the use them. In this context, this work aimed at evaluating and comparting the performance of three different vegetable-based nanolubricants (epoxidized soybean oil) with the addition of three different nanoparticles (CuO, aC:H and
CuO + aC: H), applied to the hard turning of quenched and tempered AISI D6 tool
steel using MQL technique. Thus, turning tests at constant cutting parameters (vc =
100 m/min, ap = 0.3 mm and f = 0.1 mm/rot.) with solid PCBN cutting tools were
performed. For comparison, turning tests under wet machining (using an oil-based
emulsion) and assisted by a vegetable oil (without any nanoparticles) applied under
MQL were also performed. The workpiece surface average roughness (Ra), the tool
flank wear and wear mechanisms and the morphology of the chips were the output
parameters. The aC:H and the hybrid (CuO + aC:H) nanofluids provided longer cutting tool life and higher chip thickness ratio as compared to the dry machining, which
may indicate lower cutting forces during chip formation. However, the CuO
nanofluid did not provide major difference in relation to the other lubri-cooling conditions in this evaluation criterion. With regard to the average roughness, the wet
machining provided the lowest values, the MQL conditions gave lower values as
compared with the dry machining, but without significant difference between them. |
| author2 |
Alves, Salete Martins |
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Alves, Salete Martins Carvalho, Éric Ramalho Ferreira de |
| format |
masterThesis |
| author |
Carvalho, Éric Ramalho Ferreira de |
| author_sort |
Carvalho, Éric Ramalho Ferreira de |
| title |
Estudo do desempenho de nanolubrificantes no torneamento do aço-ferramenta AISI D6 temperado e revenido |
| title_short |
Estudo do desempenho de nanolubrificantes no torneamento do aço-ferramenta AISI D6 temperado e revenido |
| title_full |
Estudo do desempenho de nanolubrificantes no torneamento do aço-ferramenta AISI D6 temperado e revenido |
| title_fullStr |
Estudo do desempenho de nanolubrificantes no torneamento do aço-ferramenta AISI D6 temperado e revenido |
| title_full_unstemmed |
Estudo do desempenho de nanolubrificantes no torneamento do aço-ferramenta AISI D6 temperado e revenido |
| title_sort |
estudo do desempenho de nanolubrificantes no torneamento do aço-ferramenta aisi d6 temperado e revenido |
| publisher |
Universidade Federal do Rio Grande do Norte |
| publishDate |
2021 |
| url |
https://repositorio.ufrn.br/handle/123456789/31669 |
| work_keys_str_mv |
AT carvalhoericramalhoferreirade estudododesempenhodenanolubrificantesnotorneamentodoacoferramentaaisid6temperadoerevenido AT carvalhoericramalhoferreirade studyofnanolubricantsperformanceintheturningofaisid6toolsteel |
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1773960946529599488 |
| spelling |
ri-123456789-316692021-03-07T08:50:04Z Estudo do desempenho de nanolubrificantes no torneamento do aço-ferramenta AISI D6 temperado e revenido Study of nanolubricants performance in the turning of AISI D6 tool steel Carvalho, Éric Ramalho Ferreira de Alves, Salete Martins http://lattes.cnpq.br/1895180941467883 http://lattes.cnpq.br/8550161853747323 Melo, Anderson Clayton Alves de http://lattes.cnpq.br/5242440649066569 Bianchi, Eduardo Carlos http://lattes.cnpq.br/1099152007574921 Torneamento duro Aço-ferramenta AISI D6 Nanolubrificantes MQL Emulsions based on mineral oil are widely used in machining processes because their appropriate lubri-cooling properties. Nevertheless, the use of these cutting fluids has been questioned because they can cause damage to the environment and the workers’ health. This issue has motivated the emergence of regulating laws to limit the use them. In this context, this work aimed at evaluating and comparting the performance of three different vegetable-based nanolubricants (epoxidized soybean oil) with the addition of three different nanoparticles (CuO, aC:H and CuO + aC: H), applied to the hard turning of quenched and tempered AISI D6 tool steel using MQL technique. Thus, turning tests at constant cutting parameters (vc = 100 m/min, ap = 0.3 mm and f = 0.1 mm/rot.) with solid PCBN cutting tools were performed. For comparison, turning tests under wet machining (using an oil-based emulsion) and assisted by a vegetable oil (without any nanoparticles) applied under MQL were also performed. The workpiece surface average roughness (Ra), the tool flank wear and wear mechanisms and the morphology of the chips were the output parameters. The aC:H and the hybrid (CuO + aC:H) nanofluids provided longer cutting tool life and higher chip thickness ratio as compared to the dry machining, which may indicate lower cutting forces during chip formation. However, the CuO nanofluid did not provide major difference in relation to the other lubri-cooling conditions in this evaluation criterion. With regard to the average roughness, the wet machining provided the lowest values, the MQL conditions gave lower values as compared with the dry machining, but without significant difference between them. Conselho Nacional de Desenvolvimento Científico e Tecnológico - CNPq Os fluidos de corte à base de óleo mineral são largamente utilizados nos processos de usinagem devido às suas propriedades lubrirrefrigerantes. A utilização desses fluidos, embora bastante vantajosa ao processo, vem sendo questionada devido à presença de substâncias tóxicas em sua composição que causam danos ao meio ambiente e à saúde do trabalhador. Nesse contexto, este trabalho tem como principal objetivo avaliar e comparar o desempenho de três nanolubrificantes de base vegetal (óleo de soja epoxidado) com adição diferentes nanopartículas (CuO, aC:H e CuO + aC:H), aplicados por MQL no torneamento do aço-ferramenta AISI D6 temperado e revenido. Para isso, foram realizados testes de faceamento com parâmetros de corte constantes (vc = 100 m/min, ap = 0,3 mm e f = 0,1 mm/rot.) com insertos sólidos de PCBN. Para fins de comparação, foram realizados testes com uma emulsão de óleo mineral aplicada por jorro e com o óleo vegetal puro (sem adição de nanopartículas) aplicado por MQL. Investigou-se a rugosidade média (Ra) da superfície usinada, o desgaste de flanco e os mecanismos de desgaste das arestas de corte, a forma e aparência dos cavacos. O nanofluido de aC:H e o híbrido (CuO + aC:H), proporcionaram uma vida da aresta superior quando comparado a condição a seco, bem como cavacos com maior grau de recalque, o que indica menores esforços para a formação do cavaco. Entretanto, o nanofluido de CuO não apresentou diferença significativa em relação às outras condições nesse critério de avaliação. Do ponto de vista da rugosidade, a condição jorro foi a que apresentou os menores valores, as condições MQL apresentaram valores menores do que os obtidos com a usinagem a seco, mas sem diferença significativa entre elas. 2021-03-03T22:54:19Z 2021-03-03T22:54:19Z 2020-10-28 masterThesis CARVALHO, Éric Ramalho Ferreira de. Estudo do desempenho de nanolubrificantes no torneamento do aço-ferramenta AISI D6 temperado e revenido. 2020. 116f. Dissertação (Mestrado em Engenharia Mecânica) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2020. https://repositorio.ufrn.br/handle/123456789/31669 pt_BR Acesso Aberto application/pdf Universidade Federal do Rio Grande do Norte Brasil UFRN PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA MECÂNICA |