Usinabilidade do aço de corte-fácil baixo carbono ao chumbo ABNT 12L14 com diferentes níveis de elementos químicos residuais (cromo, níquel e cobre)
Autor(a) principal: | |
---|---|
Data de Publicação: | 2007 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFU |
Texto Completo: | https://repositorio.ufu.br/handle/123456789/14670 |
Resumo: | The purpose of this thesis was to study the machinability of low carbon free-machining leaded steel (ABNT/AISI 12L14) with different levels of residual (tramp) elements such as chromium, nickel and copper. Nine batches of steel were produced with controlled chemical composition, and with alterations in the mentioned residual levels so as to apply two levels factorial design. The technique of design and analysis of experiments (DOE) was used in the quantitative experiments. The characterization of the studied materials involved: chemical analysis, hardness and tensile strength tests and inclusion morphology. The machinability was evaluated taking into account the variation of the cutting conditions. Chip forms and types, chip thickness ratio, surface roughness, machining forces and cutting temperature were the parameters considered and studied. The conjugation between the variables of chemical composition (residual elements) and the variables of machining (cutting velocity, depth of cut and feed) allowed, for the quantitative test, the construction of a factorial design through which all the influences and interactions could be quantified. All the tests were carried out through the operation of cylindrical turning without cutting fluid. The cutting temperature tests were carried out with high-speed steel tools. The other tests were done with carbine tools. Samples of chip roots obtained by quick-stop technique and rake faces of coated and uncoated cemented carbide tools were analysed through the techniques of optical and scanning electron microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). These techniques aimed at determining in what extent and how the machining parameters: cutting speed, feed rate, tool coating and the workpiece materials influence the morphology and the ruling conditions in the shear region, concerning the chip formation. The residual elements studied and the machining conditions showed significant influence on the machinability, considering practically all the parameters studied here. |
id |
UFU_56f7b6d5644bfc91191bfa4e5bbce45b |
---|---|
oai_identifier_str |
oai:repositorio.ufu.br:123456789/14670 |
network_acronym_str |
UFU |
network_name_str |
Repositório Institucional da UFU |
repository_id_str |
|
spelling |
2016-06-22T18:39:20Z2008-10-062016-06-22T18:39:20Z2007-07-06LUIZ, Nelis Evangelista. N. Machinability of low carbon free-machining leaded steel ABNT 12L14 with different levels of residual elements (chromium, nickel and cooper). 2007. 219 f. Tese (Doutorado em Engenharias) - Universidade Federal de Uberlândia, Uberlândia, 2007.https://repositorio.ufu.br/handle/123456789/14670The purpose of this thesis was to study the machinability of low carbon free-machining leaded steel (ABNT/AISI 12L14) with different levels of residual (tramp) elements such as chromium, nickel and copper. Nine batches of steel were produced with controlled chemical composition, and with alterations in the mentioned residual levels so as to apply two levels factorial design. The technique of design and analysis of experiments (DOE) was used in the quantitative experiments. The characterization of the studied materials involved: chemical analysis, hardness and tensile strength tests and inclusion morphology. The machinability was evaluated taking into account the variation of the cutting conditions. Chip forms and types, chip thickness ratio, surface roughness, machining forces and cutting temperature were the parameters considered and studied. The conjugation between the variables of chemical composition (residual elements) and the variables of machining (cutting velocity, depth of cut and feed) allowed, for the quantitative test, the construction of a factorial design through which all the influences and interactions could be quantified. All the tests were carried out through the operation of cylindrical turning without cutting fluid. The cutting temperature tests were carried out with high-speed steel tools. The other tests were done with carbine tools. Samples of chip roots obtained by quick-stop technique and rake faces of coated and uncoated cemented carbide tools were analysed through the techniques of optical and scanning electron microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). These techniques aimed at determining in what extent and how the machining parameters: cutting speed, feed rate, tool coating and the workpiece materials influence the morphology and the ruling conditions in the shear region, concerning the chip formation. The residual elements studied and the machining conditions showed significant influence on the machinability, considering practically all the parameters studied here.O objetivo desta tese foi estudar a usinabilidade do aço de corte fácil baixo carbono ao chumbo (ABNT/AISI 12L14) com diferentes níveis dos elementos residuais cromo, níquel e cobre. Foram produzidas nove corridas de aço com composição química controlada e alterações nos níveis de residuais citados de forma a conduzir planejamentos fatoriais a dois níveis. A técnica de Planejamento e Análise de Experimentos (DOE) foi usada nos experimentos quantitativos. A caracterização dos materiais estudados envolveu: análise de composição química, dureza e inclusões; ensaios de resistência à tração. A usinabilidade foi avaliada levando-se em consideração a variação das condições de usinagem. As variáveis de usinagem de interesse foram a forma do cavaco, a rugosidade superficial, o grau de recalque do cavaco, a força de corte e a temperatura de usinagem. A conjugação das variáveis de composição química (residuais) com as variáveis de corte (velocidade, profundidade e avanço) permitiu, para os ensaios quantitativos, a construção de planejamentos fatoriais em que todas as influências e interações puderam ser quantificadas. Todos os ensaios foram feitos em operação de torneamento cilíndrico sem fluído de corte. Os ensaios de temperatura de usinagem foram feitos com ferramentas de aço rápido. Os outros ensaios foram feitos com ferramentas de metal duro. Amostras da raiz do cavaco e da superfície de saída de ferramentas, com e sem revestimento, foram obtidas através da técnica quick-stop. Os ensaios quick-stop foram feitos com ferramentas de metal duro com e sem revestimento. Posteriormente estas amostras foram analisadas pelas técnicas de microscopia ótica, microscopia eletrônica de varredura e espectroscopia de energia dispersiva. Com isto se objetivou determinar de que forma os parâmetros velocidade de corte, avanço, revestimento da ferramenta e material da peça influenciavam a morfologia e as condições reinantes na região de formação do cavaco. Os elementos residuais estudados e as condições de corte tiveram influência significativa sobre a usinabilidade, considerando-se praticamente todos os parâmetros aqui estudados.Conselho Nacional de Desenvolvimento Científico e TecnológicoDoutor em Engenharia Mecânicaapplication/pdfporUniversidade Federal de UberlândiaPrograma de Pós-graduação em Engenharia MecânicaUFUBREngenhariasAços de corte fácilElementos químicos residuaisAnálise de raiz do cavacoAçoMetais - UsinabilidadeUsinagemMachining steelChemical residual elementsMachinabilitychip root analysisCNPQ::ENGENHARIAS::ENGENHARIA MECANICAUsinabilidade do aço de corte-fácil baixo carbono ao chumbo ABNT 12L14 com diferentes níveis de elementos químicos residuais (cromo, níquel e cobre)N. Machinability of low carbon free-machining leaded steel ABNT 12L14 with different levels of residual elements (chromium, nickel and cooper)info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisBarrozo, Marcos Antonio de Souzahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787095J7Machado, Álisson Rochahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781203T2Silva, Márcio Bacci dahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4785913J0Diniz, Anselmo Eduardohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787257TOCosta, Éder Silvahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4701060E6Melo, Anderson Clayton Alves dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4795967A5http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4798380T3Luiz, Nelis Evangelistainfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFUinstname:Universidade Federal de Uberlândia (UFU)instacron:UFUTHUMBNAILNelis Evangelista.pdf.jpgNelis Evangelista.pdf.jpgGenerated Thumbnailimage/jpeg1341https://repositorio.ufu.br/bitstream/123456789/14670/3/Nelis%20Evangelista.pdf.jpgd8038a8552104b616627c752a0876adfMD53ORIGINALNelis Evangelista.pdfapplication/pdf7826341https://repositorio.ufu.br/bitstream/123456789/14670/1/Nelis%20Evangelista.pdf51c6406828614665de0f1c46160d0addMD51TEXTNelis Evangelista.pdf.txtNelis Evangelista.pdf.txtExtracted texttext/plain311910https://repositorio.ufu.br/bitstream/123456789/14670/2/Nelis%20Evangelista.pdf.txt38ee9b854c7a721db8f66a1bf1f1f920MD52123456789/146702017-10-11 12:22:16.686oai:repositorio.ufu.br:123456789/14670Repositório InstitucionalONGhttp://repositorio.ufu.br/oai/requestdiinf@dirbi.ufu.bropendoar:2017-10-11T15:22:16Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU)false |
dc.title.por.fl_str_mv |
Usinabilidade do aço de corte-fácil baixo carbono ao chumbo ABNT 12L14 com diferentes níveis de elementos químicos residuais (cromo, níquel e cobre) |
dc.title.alternative.eng.fl_str_mv |
N. Machinability of low carbon free-machining leaded steel ABNT 12L14 with different levels of residual elements (chromium, nickel and cooper) |
title |
Usinabilidade do aço de corte-fácil baixo carbono ao chumbo ABNT 12L14 com diferentes níveis de elementos químicos residuais (cromo, níquel e cobre) |
spellingShingle |
Usinabilidade do aço de corte-fácil baixo carbono ao chumbo ABNT 12L14 com diferentes níveis de elementos químicos residuais (cromo, níquel e cobre) Luiz, Nelis Evangelista Aços de corte fácil Elementos químicos residuais Análise de raiz do cavaco Aço Metais - Usinabilidade Usinagem Machining steel Chemical residual elements Machinability chip root analysis CNPQ::ENGENHARIAS::ENGENHARIA MECANICA |
title_short |
Usinabilidade do aço de corte-fácil baixo carbono ao chumbo ABNT 12L14 com diferentes níveis de elementos químicos residuais (cromo, níquel e cobre) |
title_full |
Usinabilidade do aço de corte-fácil baixo carbono ao chumbo ABNT 12L14 com diferentes níveis de elementos químicos residuais (cromo, níquel e cobre) |
title_fullStr |
Usinabilidade do aço de corte-fácil baixo carbono ao chumbo ABNT 12L14 com diferentes níveis de elementos químicos residuais (cromo, níquel e cobre) |
title_full_unstemmed |
Usinabilidade do aço de corte-fácil baixo carbono ao chumbo ABNT 12L14 com diferentes níveis de elementos químicos residuais (cromo, níquel e cobre) |
title_sort |
Usinabilidade do aço de corte-fácil baixo carbono ao chumbo ABNT 12L14 com diferentes níveis de elementos químicos residuais (cromo, níquel e cobre) |
author |
Luiz, Nelis Evangelista |
author_facet |
Luiz, Nelis Evangelista |
author_role |
author |
dc.contributor.advisor-co1.fl_str_mv |
Barrozo, Marcos Antonio de Souza |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787095J7 |
dc.contributor.advisor1.fl_str_mv |
Machado, Álisson Rocha |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781203T2 |
dc.contributor.referee1.fl_str_mv |
Silva, Márcio Bacci da |
dc.contributor.referee1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4785913J0 |
dc.contributor.referee2.fl_str_mv |
Diniz, Anselmo Eduardo |
dc.contributor.referee2Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787257TO |
dc.contributor.referee3.fl_str_mv |
Costa, Éder Silva |
dc.contributor.referee3Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4701060E6 |
dc.contributor.referee4.fl_str_mv |
Melo, Anderson Clayton Alves de |
dc.contributor.referee4Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4795967A5 |
dc.contributor.authorLattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4798380T3 |
dc.contributor.author.fl_str_mv |
Luiz, Nelis Evangelista |
contributor_str_mv |
Barrozo, Marcos Antonio de Souza Machado, Álisson Rocha Silva, Márcio Bacci da Diniz, Anselmo Eduardo Costa, Éder Silva Melo, Anderson Clayton Alves de |
dc.subject.por.fl_str_mv |
Aços de corte fácil Elementos químicos residuais Análise de raiz do cavaco Aço Metais - Usinabilidade Usinagem |
topic |
Aços de corte fácil Elementos químicos residuais Análise de raiz do cavaco Aço Metais - Usinabilidade Usinagem Machining steel Chemical residual elements Machinability chip root analysis CNPQ::ENGENHARIAS::ENGENHARIA MECANICA |
dc.subject.eng.fl_str_mv |
Machining steel Chemical residual elements Machinability chip root analysis |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA MECANICA |
description |
The purpose of this thesis was to study the machinability of low carbon free-machining leaded steel (ABNT/AISI 12L14) with different levels of residual (tramp) elements such as chromium, nickel and copper. Nine batches of steel were produced with controlled chemical composition, and with alterations in the mentioned residual levels so as to apply two levels factorial design. The technique of design and analysis of experiments (DOE) was used in the quantitative experiments. The characterization of the studied materials involved: chemical analysis, hardness and tensile strength tests and inclusion morphology. The machinability was evaluated taking into account the variation of the cutting conditions. Chip forms and types, chip thickness ratio, surface roughness, machining forces and cutting temperature were the parameters considered and studied. The conjugation between the variables of chemical composition (residual elements) and the variables of machining (cutting velocity, depth of cut and feed) allowed, for the quantitative test, the construction of a factorial design through which all the influences and interactions could be quantified. All the tests were carried out through the operation of cylindrical turning without cutting fluid. The cutting temperature tests were carried out with high-speed steel tools. The other tests were done with carbine tools. Samples of chip roots obtained by quick-stop technique and rake faces of coated and uncoated cemented carbide tools were analysed through the techniques of optical and scanning electron microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). These techniques aimed at determining in what extent and how the machining parameters: cutting speed, feed rate, tool coating and the workpiece materials influence the morphology and the ruling conditions in the shear region, concerning the chip formation. The residual elements studied and the machining conditions showed significant influence on the machinability, considering practically all the parameters studied here. |
publishDate |
2007 |
dc.date.issued.fl_str_mv |
2007-07-06 |
dc.date.available.fl_str_mv |
2008-10-06 2016-06-22T18:39:20Z |
dc.date.accessioned.fl_str_mv |
2016-06-22T18:39:20Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
LUIZ, Nelis Evangelista. N. Machinability of low carbon free-machining leaded steel ABNT 12L14 with different levels of residual elements (chromium, nickel and cooper). 2007. 219 f. Tese (Doutorado em Engenharias) - Universidade Federal de Uberlândia, Uberlândia, 2007. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufu.br/handle/123456789/14670 |
identifier_str_mv |
LUIZ, Nelis Evangelista. N. Machinability of low carbon free-machining leaded steel ABNT 12L14 with different levels of residual elements (chromium, nickel and cooper). 2007. 219 f. Tese (Doutorado em Engenharias) - Universidade Federal de Uberlândia, Uberlândia, 2007. |
url |
https://repositorio.ufu.br/handle/123456789/14670 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Uberlândia |
dc.publisher.program.fl_str_mv |
Programa de Pós-graduação em Engenharia Mecânica |
dc.publisher.initials.fl_str_mv |
UFU |
dc.publisher.country.fl_str_mv |
BR |
dc.publisher.department.fl_str_mv |
Engenharias |
publisher.none.fl_str_mv |
Universidade Federal de Uberlândia |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFU instname:Universidade Federal de Uberlândia (UFU) instacron:UFU |
instname_str |
Universidade Federal de Uberlândia (UFU) |
instacron_str |
UFU |
institution |
UFU |
reponame_str |
Repositório Institucional da UFU |
collection |
Repositório Institucional da UFU |
bitstream.url.fl_str_mv |
https://repositorio.ufu.br/bitstream/123456789/14670/3/Nelis%20Evangelista.pdf.jpg https://repositorio.ufu.br/bitstream/123456789/14670/1/Nelis%20Evangelista.pdf https://repositorio.ufu.br/bitstream/123456789/14670/2/Nelis%20Evangelista.pdf.txt |
bitstream.checksum.fl_str_mv |
d8038a8552104b616627c752a0876adf 51c6406828614665de0f1c46160d0add 38ee9b854c7a721db8f66a1bf1f1f920 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU) |
repository.mail.fl_str_mv |
diinf@dirbi.ufu.br |
_version_ |
1802110429381525504 |