Effect of Various Spheroidizing Methods on Microstructure-Mechanical Properties and Wear Performance of PM High-Carbon Steel

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dc.contributor.authorGokmese, Hakan
dc.contributor.authorKaradag, Hakan Burak
dc.contributor.authorTasdogen, Hacer
dc.date.accessioned2024-02-23T13:59:58Z
dc.date.available2024-02-23T13:59:58Z
dc.date.issued2022
dc.departmentNEÜen_US
dc.description.abstractIn high-carbon unalloyed steels produced by the powder metallurgy method, the effect of different spheroidizing heat treatments on microstructure, mechanical properties, and wear performance was studied. For this purpose, 1.2 wt% graphite powders were added to Fe powders, and a powder composition was formed. The prepared powder mixtures were pressed at room temperature under 850 MPa and then sintered at 1180 degrees C for 20 min. After sintering, sample phase compositions were determined by the XRD analysis. Then, three different spheroidizing heat treatments were applied. First, the conventional spheroidizing was used for 5-10-20-40 h at a constant temperature of 700 degrees C. Secondly, for 5-10-20-40 h, cyclical spheroidizing was involved in the temperature range of 700 degrees C and 740 degrees C. A third heat treatment (post-quenching spheroidizing), which represented the study's original aspect and was an alternative to these known spheroidizing methods, was applied. Fully austenitized work-pieces were quenched in water at room temperature. Consequently, the martensitic structure was formed. These samples were over-annealed for 5-10-20 h at 700 degrees C. Even after a short period, such as 5 h, homogeneous and fine spherical cementite was formed in the microstructure. Depending on the spherical cementite morphology and distribution, impact toughness and hardness values were evaluated. Besides, steels' wear characteristics were determined using the block-on disc device, and three-dimensional worn surface morphologies were examined with the profilometer device. With the scanning electron microscope (SEM), microstructures formed due to different heat treatments were displayed. Also, the fractured and worn surfaces of the samples were examined. It was determined that with the post-quenching spheroidizing treatment, which may be an alternative to known and widely used spheroidizing treatments, the desired microstructure and properties such as machinability and ductility could be achieved in a much shorter period.en_US
dc.identifier.doi10.1007/s12666-021-02450-z
dc.identifier.endpage447en_US
dc.identifier.issn0972-2815
dc.identifier.issn0975-1645
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-85117566255en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage435en_US
dc.identifier.urihttps://doi.org/10.1007/s12666-021-02450-z
dc.identifier.urihttps://hdl.handle.net/20.500.12452/11403
dc.identifier.volume75en_US
dc.identifier.wosWOS:000710064300001en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSpringer Indiaen_US
dc.relation.ispartofTransactions Of The Indian Institute Of Metalsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectPowder Metallurgyen_US
dc.subjectSpheroidization Heat Treatmenten_US
dc.subjectMicrostructureen_US
dc.subjectImpact Toughnessen_US
dc.subjectHardnessen_US
dc.subjectWearen_US
dc.titleEffect of Various Spheroidizing Methods on Microstructure-Mechanical Properties and Wear Performance of PM High-Carbon Steelen_US
dc.typeArticleen_US

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