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Influence of temperature on friction behaviour of tool steels sliding against Al-Si coated UHSS
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-3123-0303
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-1162-4671
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-1454-1118
Number of Authors: 3
2016 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

In the automotive industry, a significant amount of components are formed using hot stamping. This process allows formation of complex shapes whilst controlling microstructure and mechanical properties of the end product. There are different tribological challenges encountered within the process due to the elevated temperature. The current studies focused on the tribological behaviour of different tool steels sliding against Al-Si coated steel (typically used in hot stamping) at different temperatures. It was observed that the tool steel temperature and the work-piece material temperature had a direct effect on friction level and stability and on the wear mechanisms; particularly in the occurrence of adhesive wear and material transfer onto the tool steels. In general, larger amount of material transfer and higher friction was observed with lower temperatures on the tool steel (~200˚C) and higher temperature of the work-piece material (~900˚C). The presence of oxides on the tool steel reduced the severity of material transfer and stabilised friction. However, the tool steel composition also affected the effectiveness in the stabilisation of the friction coefficient.

Place, publisher, year, edition, pages
2016.
National Category
Engineering and Technology Tribology
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-62578OAI: oai:DiVA.org:ltu-62578DiVA: diva2:1083251
Conference
STLE Annual Meeting & Exhibition : 15/05/2016 - 19/05/2016
Available from: 2017-03-20 Created: 2017-03-20 Last updated: 2017-11-24Bibliographically approved

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Pelcastre, LeonardoHardell, JensPrakash, Braham

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