Influence of temperature on friction behaviour of tool steels sliding against Al-Si coated UHSS
2016 (English)Conference paper, Presentation (Refereed)
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
Engineering and Technology
IdentifiersURN: urn:nbn:se:ltu:diva-62578OAI: oai:DiVA.org:ltu-62578DiVA: diva2:1083251
2016 STLE Annual Meeting