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Chemical Interactions Between Cemented Carbide and Difficult-to-Machine Materials by Diffusion Couple Method and Simulations
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.ORCID iD: 0000-0002-2361-959x
Seco Tools AB, R&D Mat & Technol Dev, S-73782 Fagersta, Sweden.
Seco Tools AB, R&D Mat & Technol Dev, S-73782 Fagersta, Sweden.
Sandvik Coromant R&D, Lerkrogsvagen 19, S-12680 Stockholm, Sweden.
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2018 (English)In: Journal of phase equilibria and diffusion, ISSN 1547-7073, Vol. 39, no 4, p. 369-376Article in journal (Refereed) Published
Abstract [en]

A simple and efficient diffusion couple method is utilized to study the chemical interactions between cemented carbide cutting tools and difficult-to-machine materials (Ti, Ti-6Al-4V, Ni, Inconel 718, Fe, and AISI 316L). The experimental results and simulations probe different chemical interactions between the cemented carbide and work materials. In particular, the formation of a thick TiC layer is observed at the cemented carbide/Ti and Ti-6Al-4V interface while eta-phase is formed at the interface between the cemented carbide and work materials Inconel 718, Fe and AISI 316L. Pure titanium and Ti-6Al-4V both interact strongly with the tool causing formation of TiC and dissolution of WC-grains. Experiments and diffusion simulations confirm bcc-W formation and progressive diffusion of W into bcc-Ti. For both Ti and Fe work materials a dense band of carbides (WC + eta or WC + TiC) forms at the interface, effectively inhibiting further diffusion. Ni does not form any stable carbide and lowers the eta-phase limit in terms of carbon content, wherefore diffusion can occur freely. The diffusion couple method used in this work, corroborated by DICTRA simulations should serve as a useful tool in the detailed analysis of worn tools where chemical wear is dominant.

Place, publisher, year, edition, pages
SPRINGER , 2018. Vol. 39, no 4, p. 369-376
Keywords [en]
cemented carbide, DICTRA modeling, diffusion couples, machining
National Category
Other Materials Engineering
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URN: urn:nbn:se:uu:diva-363060DOI: 10.1007/s11669-018-0639-yISI: 000441127400002OAI: oai:DiVA.org:uu-363060DiVA, id: diva2:1256822
Available from: 2018-10-18 Created: 2018-10-18 Last updated: 2018-10-18Bibliographically approved

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von Fieandt, LinusÅrhammar, Cecilia

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