Effects of milling condition on the surface integrity of hot forged steel
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1678-58782010000100006 http://hdl.handle.net/11449/219579 |
Resumo: | This paper presents a study on the influence of milling condition on workpiece surface integrity focusing on hardness and roughness. The experimental work was carried out on a CNC machining center considering roughing and finishing operations. A 25 mm diameter endmill with two cemented carbide inserts coated with TiN layer were used for end milling operation. Low carbon alloyed steel Cr-Mo forged at 1200°C was used as workpiece on the tests. Two kinds of workpiece conditions were considered, i.e. air cooled after hot forging and normalized at 950°C for 2 h. The results showed that finishing operation was able to significantly decrease the roughness by at least 46% without changing the hardness. On the other hand, roughing operation caused an increase in hardness statistically significant by about 6%. The machined surface presented deformed regions within feed marks, which directly affected the roughness. Surface finish behavior seems to correlate to the chip ratio given the decrease of 25% for roughing condition, which damaged the chip formation. The material removal rate for finishing operation 41% greater than roughing condition demonstrated to be favorable to the heat dissipation and minimized the effect on material hardness. Copyright © 2010 by ABCM. |
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Repositório Institucional da UNESP |
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spelling |
Effects of milling condition on the surface integrity of hot forged steelHardnessHigh-speed cuttingMillingRoughnessSurface integrityThis paper presents a study on the influence of milling condition on workpiece surface integrity focusing on hardness and roughness. The experimental work was carried out on a CNC machining center considering roughing and finishing operations. A 25 mm diameter endmill with two cemented carbide inserts coated with TiN layer were used for end milling operation. Low carbon alloyed steel Cr-Mo forged at 1200°C was used as workpiece on the tests. Two kinds of workpiece conditions were considered, i.e. air cooled after hot forging and normalized at 950°C for 2 h. The results showed that finishing operation was able to significantly decrease the roughness by at least 46% without changing the hardness. On the other hand, roughing operation caused an increase in hardness statistically significant by about 6%. The machined surface presented deformed regions within feed marks, which directly affected the roughness. Surface finish behavior seems to correlate to the chip ratio given the decrease of 25% for roughing condition, which damaged the chip formation. The material removal rate for finishing operation 41% greater than roughing condition demonstrated to be favorable to the heat dissipation and minimized the effect on material hardness. Copyright © 2010 by ABCM.São Paulo State University - UNESP Engineering Faculty of Ilha Solteira, 15.385-000 Ilha Solteira, SPSão Paulo State University - UNESP Engineering Faculty of Ilha Solteira, 15.385-000 Ilha Solteira, SPUniversidade Estadual Paulista (UNESP)Rodrigues, Alessandro R. [UNESP]Matsumoto, HidekasuYamakami, Wyser J.Paulo, Rafael Gustavo Da R.De Assis, Cleiton Lazaro F.2022-04-28T18:56:18Z2022-04-28T18:56:18Z2010-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article37-43http://dx.doi.org/10.1590/S1678-58782010000100006Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 32, n. 1, p. 37-43, 2010.1806-36911678-5878http://hdl.handle.net/11449/21957910.1590/S1678-587820100001000062-s2.0-77955537802Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of the Brazilian Society of Mechanical Sciences and Engineeringinfo:eu-repo/semantics/openAccess2022-04-28T18:56:18Zoai:repositorio.unesp.br:11449/219579Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:20:28.469778Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effects of milling condition on the surface integrity of hot forged steel |
title |
Effects of milling condition on the surface integrity of hot forged steel |
spellingShingle |
Effects of milling condition on the surface integrity of hot forged steel Rodrigues, Alessandro R. [UNESP] Hardness High-speed cutting Milling Roughness Surface integrity |
title_short |
Effects of milling condition on the surface integrity of hot forged steel |
title_full |
Effects of milling condition on the surface integrity of hot forged steel |
title_fullStr |
Effects of milling condition on the surface integrity of hot forged steel |
title_full_unstemmed |
Effects of milling condition on the surface integrity of hot forged steel |
title_sort |
Effects of milling condition on the surface integrity of hot forged steel |
author |
Rodrigues, Alessandro R. [UNESP] |
author_facet |
Rodrigues, Alessandro R. [UNESP] Matsumoto, Hidekasu Yamakami, Wyser J. Paulo, Rafael Gustavo Da R. De Assis, Cleiton Lazaro F. |
author_role |
author |
author2 |
Matsumoto, Hidekasu Yamakami, Wyser J. Paulo, Rafael Gustavo Da R. De Assis, Cleiton Lazaro F. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Rodrigues, Alessandro R. [UNESP] Matsumoto, Hidekasu Yamakami, Wyser J. Paulo, Rafael Gustavo Da R. De Assis, Cleiton Lazaro F. |
dc.subject.por.fl_str_mv |
Hardness High-speed cutting Milling Roughness Surface integrity |
topic |
Hardness High-speed cutting Milling Roughness Surface integrity |
description |
This paper presents a study on the influence of milling condition on workpiece surface integrity focusing on hardness and roughness. The experimental work was carried out on a CNC machining center considering roughing and finishing operations. A 25 mm diameter endmill with two cemented carbide inserts coated with TiN layer were used for end milling operation. Low carbon alloyed steel Cr-Mo forged at 1200°C was used as workpiece on the tests. Two kinds of workpiece conditions were considered, i.e. air cooled after hot forging and normalized at 950°C for 2 h. The results showed that finishing operation was able to significantly decrease the roughness by at least 46% without changing the hardness. On the other hand, roughing operation caused an increase in hardness statistically significant by about 6%. The machined surface presented deformed regions within feed marks, which directly affected the roughness. Surface finish behavior seems to correlate to the chip ratio given the decrease of 25% for roughing condition, which damaged the chip formation. The material removal rate for finishing operation 41% greater than roughing condition demonstrated to be favorable to the heat dissipation and minimized the effect on material hardness. Copyright © 2010 by ABCM. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-01-01 2022-04-28T18:56:18Z 2022-04-28T18:56:18Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S1678-58782010000100006 Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 32, n. 1, p. 37-43, 2010. 1806-3691 1678-5878 http://hdl.handle.net/11449/219579 10.1590/S1678-58782010000100006 2-s2.0-77955537802 |
url |
http://dx.doi.org/10.1590/S1678-58782010000100006 http://hdl.handle.net/11449/219579 |
identifier_str_mv |
Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 32, n. 1, p. 37-43, 2010. 1806-3691 1678-5878 10.1590/S1678-58782010000100006 2-s2.0-77955537802 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of the Brazilian Society of Mechanical Sciences and Engineering |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
37-43 |
dc.source.none.fl_str_mv |
Scopus 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 |
|
_version_ |
1808129054269767680 |