Influence of a heat treatment prior to cold forging operations on the performance of lubricants

Autor:	Christoph Müller, Peter Groche, Philipp Kramer, Vladimir Rezanov, Sebastian Zang
Rok vydání:	2015
Předmět:	Materials science Mechanical Engineering Metallurgy Surfaces and Interfaces Tribology Forging Surfaces Coatings and Films chemistry.chemical_compound chemistry Mechanics of Materials Surface roughness Lubrication Extrusion Composite material Lubricant Molybdenum disulfide Dry lubricant
Zdroj:	Tribology International. 92:67-71
ISSN:	0301-679X
DOI:	10.1016/j.triboint.2015.05.028
Popis:	Cold forging operations are subject to high tribological loads. In order to enable a reliable forging process, lubricants have to be chosen with respect to the occurring loads. However, it is known that well established lubricants can increase the surface roughness of a specimen as a consequence of the forming. On the other hand, zinc-phosphate + molybdenum disulfide which is known to create a smooth specimen surface often shows higher friction coefficients. Therefore, a sound lubrication is of special interest for near net-shape operations. The paper at hand presents the results of a heat treatment prior to cold forging operations on the performance of lubricants. The zinc-phosphate + molybdenum disulfide lubrication system indicates that a heat treatment of the lubricant results in a decrease of the friction coefficient. Tests on the Sliding Compression Test as well as a standard rod extrusion process were carried out in this investigation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::963d3849b537ce611302f3c8e4cd9105 https://doi.org/10.1016/j.triboint.2015.05.028 Zobrazit plný text záznamu Full Text from ScienceDirect