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Tribological properties of hardened high strength Boron steel at combined rolling and sliding condition
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0002-5988-9647
2009 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 267, no 12, p. 2287-2293Article in journal (Refereed) Published
Abstract [en]

The use of hardened high strength steel is found in applications where high wear resistance is required. The wear properties of high strength Boron steel are well known in applications with abrasive wear from stones, ore and other hard material. A unique concept of wear protection of rails is newly presented, a wear resistant cap made of hardened high strength Boron steel.Reducing the wear of rails and wheels and controlling the frictional behavior in the wheel/rail contact are two key issues for railway owners in order to reduce the increasing costs related to higher axle loads, higher speeds, more frequent traffic, etc. Therefore, the aim of this work has been to investigate and compare the tribological properties of Boron steel and UIC 1100 rail steel in contact with Blue Light wheel steel (AAR Class C (69-JDG-8)) under dry and water lubricated conditions in a two-disc tribometer. Advanced analytical instruments including 3D optical surface profiler, micro-hardness indenter, light microscope and SEM/EDS were used to analyze the results.Results from the experiments show that the friction coefficient in tests with Boron steel is more stable both in dry and water lubricated conditions than tests including UIC 1100 rail steel used in todays application. Surface damages seen from water lubricated tests on UIC 1100 rail steel are not seen on the surface of the Boron steel discs. In all tests, the wear decreased when water was added in the contact and friction was slightly decreased.

Place, publisher, year, edition, pages
2009. Vol. 267, no 12, p. 2287-2293
Keywords [en]
Engineering mechanics - Mechanical manufacturing
Keywords [sv]
Teknisk mekanik - Mekanisk tillverkningsteknik
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-4595DOI: 10.1016/j.wear.2009.09.014ISI: 000272810200018Scopus ID: 2-s2.0-71849107893Local ID: 28f1b2d0-e4ac-11de-bae5-000ea68e967bOAI: oai:DiVA.org:ltu-4595DiVA, id: diva2:977469
Note
Validerad; 2009; Bibliografisk uppgift: NORDTRIB 2008; 20091209 (elka)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Kassfeldt, ElisabetLundmark, Jonas

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