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New Alloying Systems for Sintered Steels: Critical Aspects of Sintering Behavior

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dc.affiliation.dptoUC3M. Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Químicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Tecnología de Polvoses
dc.contributor.authorOro, Raqueles
dc.contributor.authorCampos Gómez, Mónicaes
dc.contributor.authorGierl-Mayer, Christian
dc.contributor.authorDanninger, Herbert
dc.contributor.authorTorralba Castelló, José Manueles
dc.date.accessioned2015-01-26T11:27:22Z
dc.date.issued2015-03
dc.description.abstractOxygen-sensitive alloying elements such as Mn, Si, and Cr have a high potential for improving the properties of low alloyed sintered steels while reducing the alloying cost. However, it is necessary to find a way for avoiding, or at least minimizing, the oxidation of these elements especially during the early stages of the sintering cycle. In this study Mn, Si, and Cr were introduced in the form of a master alloy powder designed to be mixed with the iron base powder and provide the final composition of the steel during the sintering process. The reduction/oxidation phenomena taking place during the heating stage were studied by thermogravimetry, dilatometry, and mass spectroscopy, using either reducing (H2) or inert (Ar) atmospheres. The results show how the difference in chemical activity between base iron powder and master alloy causes the so called "internal-getter" effect, by which the reduction of less stable iron oxides leads to oxidation of the elements with higher affinity for oxygen. This effect can be somehow minimized when sintering in H2, since the iron oxides are reduced at lower temperatures at which the reactivity of the elements in the master alloy is lower. However, H2 concentration in the processing atmosphere needs to be carefully adapted to the specific composition of the materials being processed in order to minimize decarburization by methane formation during sintering.en
dc.description.sponsorshipHöganäs AB Sweden, financial support provided through the Höganäs Chair IVen
dc.description.statusPublicadoes
dc.format.extent11
dc.format.mimetypeapplication/pdf
dc.identifier.bibliographicCitationMetallurgical and Materials Transactions A (2015), 46 (3), 1349-1359.en
dc.identifier.doi10.1007/s11661-014-2707-1
dc.identifier.issn1073-5623 (print)
dc.identifier.issn1543-1940 (online)
dc.identifier.publicationfirstpage1349
dc.identifier.publicationissue3
dc.identifier.publicationlastpage1359
dc.identifier.publicationtitleMetallurgical and materials transactions. A, Physical metallurgy and materials scienceen
dc.identifier.publicationvolume46
dc.identifier.urihttps://hdl.handle.net/10016/19930
dc.identifier.uxxiAR/0000016031
dc.language.isoengen
dc.publisherSpringer
dc.relation.publisherversionhttp://dx.doi.org/10.1007/s11661-014-2707-1
dc.rights© 2015 The Minerals, Metals & Materials Society and ASM Internationalen
dc.rights.accessRightsopen access
dc.subject.ecienciaMaterialeses
dc.subject.ecienciaQuímicaes
dc.subject.otherSinteringen
dc.subject.otherSintering behavioren
dc.subject.otherAlloyen
dc.subject.otherSintered Steelsen
dc.titleNew Alloying Systems for Sintered Steels: Critical Aspects of Sintering Behavioren
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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