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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. Lulea University of Technology.ORCID iD: 0000-0003-3123-0303
2016 (English)In: Proceedings of the 17th Nordic Symposium on Tribology - Nordtrib 2016, 2016Conference paper, Abstract (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
Identifiers
URN: urn:nbn:se:ltu:diva-62580OAI: oai:DiVA.org:ltu-62580DiVA: diva2:1083265
Conference
17th Nordic Symposium on Tribology, Nordtrib 2016
Available from: 2017-03-20 Created: 2017-03-20 Last updated: 2017-03-20

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