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Thermally induced surface integrity changes of ground WC-Co hardmetals
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering. University of Politecn Cataluna, Spain.
University of Politecn Cataluna, Spain; University of Politecn Cataluna, Spain.
SECO Tools AB, Sweden.
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-2286-5588
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2016 (English)In: 3RD CIRP CONFERENCE ON SURFACE INTEGRITY, Elsevier, 2016, Vol. 45, p. 91-94Conference paper, Published paper (Refereed)
Abstract [en]

Ground hardmetals are exposed to high temperatures during both processing (e.g. coating deposition) and use (e.g. as a cutting tool). However, studies on thermally induced changes of surface integrity are limited. Here we address this by means of FIB/FESEM and EBSD investigation, with special focus on the binder phase characterization. Our findings indicate that thermal treatment causes two main surface modifications. First, an unexpected microporosity appears in the binder within the subsurface layer when ground surfaces are heated. Second, the metallic phase underneath the ground surface experiences metallurgical changes, in terms of grain and crystallographic phase structures. The mechanisms responsible for these modifications of the binder are discussed in terms of grinding-induced and thermally-reversed phase transformation as well as recrystallization phenomena. We also note that no additional heat treatment related changes such as microcracking and carbide fragmentation in the subsurface layer, are discerned. (C) 2016 The Authors. Published by Elsevier B.V.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 45, p. 91-94
Series
Procedia CIRP, ISSN 2212-8271
Keyword [en]
Grinding; Thermal effect; Surface integrity; Cemented Carbides
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:liu:diva-144007DOI: 10.1016/j.procir.2016.02.092ISI: 000417326500023Scopus ID: 2-s2.0-84978715614OAI: oai:DiVA.org:liu-144007DiVA, id: diva2:1170177
Conference
3rd CIRP Conference on Surface Integrity, JUN 08-10, 2016, Charlotte, NC
Note

Funding Agencies|Spanish MINECO [MAT 2012-34602]; EUs Erasmus Mundus joint European Doctoral Programme DocMASE

Available from: 2018-01-02 Created: 2018-01-02 Last updated: 2018-01-16Bibliographically approved

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Johansson-Jõesaar, Mats P.

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Yang, JieOdén, MagnusJohansson-Jõesaar, Mats P.
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