Please use this identifier to cite or link to this item: doi:10.22028/D291-29850
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Title: Surface integrity assessment of laser treated and subsequently coated cemented carbides
Author(s): Fang, Shiqi
García Marro, Fernando
Salan, Nuria
Cruz, Marlon
Colominas, Carles
Bähre, Dirk
Llanes, Luis
Language: English
Title: International journal of refractory metals & hard materials
Volume: 83
Publisher/Platform: Elsevier
Year of Publication: 2019
Publikation type: Journal Article
Abstract: Cemented carbides, referred to as hardmetals, are forefront engineering materials widely implemented in industry for chip-removal cutting tools and supporting parts. As a newly developed technology for surface modification with high precision, the application of short pulse laser may extend the utilization of cemented carbides. However, surface integrity of laser-treated materials may be affected during the ablation phenomena. These potential changes may also be relevant for subsequent coating deposition, a surface modification stage usually invoked in many cutting and forming tools. It is the objective of this work to study the influence of a previous laser treatment on the surface integrity of a cemented carbide grade, finally coated by a ceramic layer introduced by physical vapor deposition. In doing so, a nanosecond laser has been employed. Surface integrity is assessed in terms of roughness, hardness, and microstructural changes induced at the subsurface level. It is found that pulse laser can effectively remove the target material, resulting roughness being similar to that attained by abrasive grinding. Although some subsurface damage is observed, it is limited to a very shallow layer, this being thoroughly eliminated during sandblasting implemented before coating deposition. Relative hardness increase is larger for laser treated substrate than for just polished one, reason behind it being speculated to come from the sandblasting stage used for removing damaged layer.
DOI of the first publication: 10.1016/j.ijrmhm.2019.104982
URL of the first publication:
Link to this record: hdl:20.500.11880/28438
ISSN: 0263-4368
Date of registration: 5-Dec-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Dirk Bähre
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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