Detalhes bibliográficos
| Ano de defesa: |
2023 |
| Autor(a) principal: |
Martins, André Carvalho
 |
| Orientador(a): |
Contin, André
|
| Banca de defesa: |
Contin, André,
Bertholdi, Jonas,
Ferreira Filho, Demóstenes,
Cunha, Daniel Fernandes da |
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
|
| Programa de Pós-Graduação: |
Programa de Pós-graduação em Engenharia Mecânica
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| Departamento: |
Escola de Engenharia Elétrica, Mecânica e de Computação - EMC (RMG)
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/13254
|
Resumo: |
AISI 304 stainless steels play a crucial role in the pharmaceutical industry due to their resistance to chemical reactivity. However, their wear resistance is limited in high-temperature and highpressure environments. Laser treatment emerges as a promising approach to enhance their properties. In this study, a low-cost 100 W CO2 laser is used for the surface treatment of AISI 304 steels, with the addition of carbon black powder. The results showed a significant increase in surface hardness after laser treatment compared to the untreated substrate. EDS analyses revealed the presence of carbon on the surface of the substrates. In addition to the increased surface hardness, the coefficient of friction of the laser-treated samples was reduced when compared to the reference substrate. Ultimately, carbon black acted as a photoabsorbing material for radiation, a source of carbon for increasing surface hardness, and as a solid lubricant. These results demonstrate the viability of using a low-cost CO2 laser as an efficient, versatile, and rapid alternative to improve the properties of materials employed in the pharmaceutical industry. |
