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High temperature tribological studies on surface engineered tool steel and high strength boron steel
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-1162-4671
University of Kassel.
2009 (English)In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, Vol. 80, no 9, p. 665-670Article in journal (Refereed) Published
Abstract [en]

The popularity of hot sheet metal forming processes in the recent years has necessitated research efforts to improve tool life and control the friction level during hot forming operations. In this work, the tribological properties of tool steel and ultra high strength boron steel (UHSS) pairs at elevated temperatures have been studied by using a special hot sheet metal forming test rig that closely simulates the conditions prevalent in the real process. This test involves linear unidirectional sliding of a preheated UHSS sheet between two tool steel specimens where new workpiece material is continuously in contact with the tool surface. The study is aimed at investigating different surface treatments/coatings applied on either the tool or sheet surface or on both. The results have shown that it is possible to control the coefficients of friction through surface treatments and coatings of the tool and workpiece materials. The application of a coating onto the sheet material has a greater influence on the friction compared to changing the tool steel surface. After running-in, the investigated tool steel variants show almost similar frictional behaviour when sliding against the same sheet material. Although coating the UHSS sheet reduces friction, it abrades the tool surface and also results in transfer of the sheet coating material to the tool surface

Place, publisher, year, edition, pages
2009. Vol. 80, no 9, p. 665-670
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-5500DOI: 10.2374/SRI09SP067Local ID: 39dda360-ad02-11de-8293-000ea68e967bOAI: oai:DiVA.org:ltu-5500DiVA: diva2:978374
Note
Validerad; 2009; 20090929 (jenhar)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-01-10Bibliographically approved

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