Surface integrity analysis in machining of hardened AISI 4140 steel

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dc.contributor.authorSTIPKOVIC, M. A.
dc.contributor.authorEd Claudio Bordinassi
dc.contributor.authorFarias, Adalto
dc.contributor.authorSergio Delijaicov
dc.contributor.authorOrcidhttps://orcid.org/0000-0002-3915-3077
dc.contributor.authorOrcidhttps://orcid.org/0000-0002-6780-2804
dc.contributor.authorOrcidhttps://orcid.org/0000-0001-5621-9536
dc.date.accessioned2023-02-01T06:05:47Z
dc.date.available2023-02-01T06:05:47Z
dc.date.issued2017-01-23
dc.description.abstractThis study aimed to analyze the residual stresses and roughness in finishing milling of AISI 4140 steel, quenched and tempered up to hardness of 58 HRC. Machining operations were performed with the use of CBN inserts and by varying three basic cutting parameters (cutting speed, feed per tooth and cutting depth). Hardened materials are typically machined by abrasive processes, which in turn are more expensive and complex to be studied due to the undefined cutting geometry of the grinding wheel. A series of machining tests with milling process and CBN tools was implemented in order to study the resultant condition of the specimeńs surface. An experimental design was used and the results were statistically treated, enabling the generation of a model that aims to obtain roughness values due to the optimization of three adopted cutting parameters. The roughness values found in the range of Ra 0,16 to 0,4 μm indicate that it is possible to use the milling process with CBN tools for finishing, reducing machining time and the cost of the machined part. The generated residual stresses were compressive and the feed per tooth parameter showed greater influence in this result. The research was limited to test only one type of CBN insert, which was constantly replaced, preventing the influence of tool wear on responses. The geometry of the tool as well as the use of cutting fluid were not considered. Milling process with CBN inserts is confirmed as a possibility for replacing grinding process for finishing machining leading to significant gains in machining time. An optimized model was derived to predict the value of the roughness and three optimizations were made to specify the best cutting parameters to desirable answers such as better roughness, higher compressive residual stresses and low cutting forces, for example.
dc.description.firstpage387
dc.description.issuenumber2
dc.description.lastpage394
dc.description.volume20
dc.identifier.citationSTIPKOVIC, M. A.; BORDINASSI, E. C.; ADALTO, F.; DELIJAICOV, S. Surface integrity analysis in machining of hardened AISI 4140 steel. Materials Research, v. 20, n. 2, p. 387-394, marc./apr. 2017.
dc.identifier.doi10.1590/1980-5373-MR-2016-0420
dc.identifier.issn1516-1439
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/4698
dc.relation.ispartofMaterials Research
dc.rightsAcesso Aberto
dc.rights.licenseCreative Commons "Este é um artigo publicado em acesso aberto sob uma licença Creative commons (CC BY 4.0). Fonte: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85018625049&origin=inward. Acesso em 07 fev. 2023.
dc.subject.otherlanguageAISI 4140 hardened
dc.subject.otherlanguageFinishing milling
dc.subject.otherlanguageResidual stress
dc.subject.otherlanguageRoughness
dc.titleSurface integrity analysis in machining of hardened AISI 4140 steel
dc.typeArtigo
fei.scopus.citations6
fei.scopus.eid2-s2.0-85018625049
fei.scopus.subjectAISI 4140 hardened
fei.scopus.subjectCompressive residual stress
fei.scopus.subjectCutting parameters
fei.scopus.subjectGrinding process
fei.scopus.subjectHardened materials
fei.scopus.subjectMachining operations
fei.scopus.subjectOptimized models
fei.scopus.subjectSurface integrity
fei.scopus.updated2023-11-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85018625049&origin=inward
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