Resistência ao desgaste microabrasivo em um bit de aço rápido com superfície tratada via laser
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Tipo de documento: | Trabalho de conclusão de curso |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/216795 |
Resumo: | Wear is one of the main causes of failures and loss of mechanical and structural components in the world. In machining, reducing production costs is vital. Since the high speed steel is the most used material in the manufacturing of machining tools and following the advance in the laser surface treatment field, this work aims to study a way to reduce wear of high speed steel tools, approaching the surface heat treatment via laser in a tool of a high speed steel. To analyze the effects of this treatment, samples were treated by a laser system and followed by a microabrasive wear test by rotating ball for periods of 300, 600 and 900 seconds. Untreated samples were also used in the wear tests for comparison. The volume eroded in the untreated sample in the 300 second test was 8.8% greater than in the treated sample. For the 600 and 900 seconds tests, the untreated samples had a 53.1% and 6.9% lower eroded volume, respectively, when compared to treated samples. Three hypotheses for the negative results were made: The first brings post-treatment roughness as a source of friction and adhesive wear; the second says that variations in processing speeds led to samples with different surfaces and the third hypothesis brings the idea that the subsurface layers had their microstructures altered, resulting in softer portions. It turned out that the results were inconclusive and for future works it is necessary further analysis of the obtained microstructures. |
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Resistência ao desgaste microabrasivo em um bit de aço rápido com superfície tratada via laserMicroabrasive wear resistance on a high speed steel tool with a laser-treated surfaceHigh speed steelSuperficial heat treatmentLaserAbrasive wearAço rápidoTratamento térmico superficialLaserDesgaste abrasivoWear is one of the main causes of failures and loss of mechanical and structural components in the world. In machining, reducing production costs is vital. Since the high speed steel is the most used material in the manufacturing of machining tools and following the advance in the laser surface treatment field, this work aims to study a way to reduce wear of high speed steel tools, approaching the surface heat treatment via laser in a tool of a high speed steel. To analyze the effects of this treatment, samples were treated by a laser system and followed by a microabrasive wear test by rotating ball for periods of 300, 600 and 900 seconds. Untreated samples were also used in the wear tests for comparison. The volume eroded in the untreated sample in the 300 second test was 8.8% greater than in the treated sample. For the 600 and 900 seconds tests, the untreated samples had a 53.1% and 6.9% lower eroded volume, respectively, when compared to treated samples. Three hypotheses for the negative results were made: The first brings post-treatment roughness as a source of friction and adhesive wear; the second says that variations in processing speeds led to samples with different surfaces and the third hypothesis brings the idea that the subsurface layers had their microstructures altered, resulting in softer portions. It turned out that the results were inconclusive and for future works it is necessary further analysis of the obtained microstructures.O desgaste consiste numa das principais causas de falhas e perdas de componentes mecânicos e estruturais do mundo. Dentro da usinagem, a redução dos custos de produção é vital. Visto que o aço rápido é o material mais utilizado na confecção de ferramentas de usinagem e seguindo o avanço da utilização dos equipamentos a laser no tratamento de materiais, este trabalho busca estudar uma forma de se retardar o desgaste das ferramentas de aço rápido, abordando o tratamento térmico superficial via laser em um bit desse material. Para análise dos efeitos desse tratamento, amostras foram tratadas por um sistema a laser e em seguida passaram por um ensaio de desgaste microabrasivo por esfera rotativa para os tempos de 300, 600 e 900 segundos. Amostras não tratadas também passaram pelo ensaio de desgaste para comparação. O volume desgastado na amostra não tratada no ensaio de 300 segundos foi 8,8% maior que na amostra tratada. Para os ensaios de 600 e 900 segundos as amostras não tratadas tiveram um volume desgastado 53,1% e 6,9% menores, respectivamente, quando comparadas com amostras tratadas. Três hipóteses para os resultados negativos foram feitas: A primeira traz a rugosidade pós tratamento como fonte de atrito e desgaste adesivo; a segunda diz que variações nas velocidades de processamento levaram a amostras com superfícies diferentes e a terceira hipótese traz a ideia de que as camadas subsuperficiais tiveram suas microestruturas alteradas, resultando em porções mais moles. Descobriu-se que os resultados não foram conclusivos e para futuros trabalhos deve-se, principalmente, realizar a análise das microestruturas obtidas.Não recebi financiamentoUniversidade Estadual Paulista (Unesp)Yamakami, Wyser José [UNESP]Universidade Estadual Paulista (Unesp)Santos, Erick Eduardo dos2022-02-18T12:20:49Z2022-02-18T12:20:49Z2022-02-09info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bachelorThesisapplication/pdfhttp://hdl.handle.net/11449/216795porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESP2024-01-24T06:29:50Zoai:repositorio.unesp.br:11449/216795Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:49:21.185315Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Resistência ao desgaste microabrasivo em um bit de aço rápido com superfície tratada via laser Microabrasive wear resistance on a high speed steel tool with a laser-treated surface |
title |
Resistência ao desgaste microabrasivo em um bit de aço rápido com superfície tratada via laser |
spellingShingle |
Resistência ao desgaste microabrasivo em um bit de aço rápido com superfície tratada via laser Santos, Erick Eduardo dos High speed steel Superficial heat treatment Laser Abrasive wear Aço rápido Tratamento térmico superficial Laser Desgaste abrasivo |
title_short |
Resistência ao desgaste microabrasivo em um bit de aço rápido com superfície tratada via laser |
title_full |
Resistência ao desgaste microabrasivo em um bit de aço rápido com superfície tratada via laser |
title_fullStr |
Resistência ao desgaste microabrasivo em um bit de aço rápido com superfície tratada via laser |
title_full_unstemmed |
Resistência ao desgaste microabrasivo em um bit de aço rápido com superfície tratada via laser |
title_sort |
Resistência ao desgaste microabrasivo em um bit de aço rápido com superfície tratada via laser |
author |
Santos, Erick Eduardo dos |
author_facet |
Santos, Erick Eduardo dos |
author_role |
author |
dc.contributor.none.fl_str_mv |
Yamakami, Wyser José [UNESP] Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Santos, Erick Eduardo dos |
dc.subject.por.fl_str_mv |
High speed steel Superficial heat treatment Laser Abrasive wear Aço rápido Tratamento térmico superficial Laser Desgaste abrasivo |
topic |
High speed steel Superficial heat treatment Laser Abrasive wear Aço rápido Tratamento térmico superficial Laser Desgaste abrasivo |
description |
Wear is one of the main causes of failures and loss of mechanical and structural components in the world. In machining, reducing production costs is vital. Since the high speed steel is the most used material in the manufacturing of machining tools and following the advance in the laser surface treatment field, this work aims to study a way to reduce wear of high speed steel tools, approaching the surface heat treatment via laser in a tool of a high speed steel. To analyze the effects of this treatment, samples were treated by a laser system and followed by a microabrasive wear test by rotating ball for periods of 300, 600 and 900 seconds. Untreated samples were also used in the wear tests for comparison. The volume eroded in the untreated sample in the 300 second test was 8.8% greater than in the treated sample. For the 600 and 900 seconds tests, the untreated samples had a 53.1% and 6.9% lower eroded volume, respectively, when compared to treated samples. Three hypotheses for the negative results were made: The first brings post-treatment roughness as a source of friction and adhesive wear; the second says that variations in processing speeds led to samples with different surfaces and the third hypothesis brings the idea that the subsurface layers had their microstructures altered, resulting in softer portions. It turned out that the results were inconclusive and for future works it is necessary further analysis of the obtained microstructures. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-02-18T12:20:49Z 2022-02-18T12:20:49Z 2022-02-09 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/bachelorThesis |
format |
bachelorThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/11449/216795 |
url |
http://hdl.handle.net/11449/216795 |
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 Estadual Paulista (Unesp) |
publisher.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808129555848757248 |