TRIBOLOGICAL PROPERTIES OF HYPEREUTECTOID ALLOY STEELS
Journal Title: Tribologia - Year 2009, Vol 224, Issue 2
Abstract
Influences of the microstructure and material characteristics on tribological properties of hypereutectoid 80CrMoV4-3 and 90CrV6 alloy steels are considered in this paper. Investigations concerned steels, the application of which, due to working conditions, requires the determination of their tribological properties. These steels differed by grain size (4 and 10 according to ASTM) and by an amount of secondary carbide precipitates, and slightly by hardness (288 and 305 HBW). The role of morphology of carbide precipitates in the mechanism of the wear of the tested steels in contact, both with structural steels and with bearing steel, is determined in the present paper. The average friction coefficient and kinetics of its changes as well as the wear degree in dependence of the applied counter sample are estimated. Grain refinement and an increase of the fraction of secondary carbides favour the friction coefficient increase and accelerate the stabilisation of tribological conditions. This also causes a more intensive wear of such steel in the case of being in contact with basic structural steels characterised by a distinct banding, while it causes a slight decrease of wear in the case of being in contact with bearing steel. Tribological tests were performed using T-05 tester, at a load of 100 N, and at room temperature. 100Cr6 bearing steel and S355J0, S235JR, and LRAH36 constructional steels were used as counter samples. Tests were performed for the time of 2000 seconds. Products of friction were removed from the counter sample during the tribological tests.<br/><br/>
Authors and Affiliations
Janusz Krawczyk
Keywords
Related Articles
- EP ID EP516570
- DOI -
- Views 37
- Downloads 0
THE IMPACT OF THE TYPE OF CUTTING FLUID ON THE TURNING PROCESS
This article compares the test results concerning the wear of cutting tools after face turning under dry friction conditions and lubricated friction conditions with biodegradable cutting fluid or mineral-oil based emulsi...
EXPERIMENTAL STUDY OF DIFFERENT SUPPLY DESIGNS IN HYDRODYNAMIC THRUST BEARINGS
Hydrodynamic thrust bearings have considerable power losses, and in modern designs lubricated oil is cooled in external systems. After the cooling, oil is pumped back to the bearing housing, most frequently to the space...
Badania właściwości tribologicznych poliamidu PA6 i Modaru
W pracy przedstawiono wyniki badań właściwości tribologicznych skojarzeń trących poliamid PA6/ stal C45 i Modar/ stal C45 w warunkach tarcia suchego oraz w obecności smarów plastycznych M11, M16 oraz ŁT4-S3. Badania właś...
BEARING CAPACITY OF THE SURFACE AFTER MACHINING WITH MINIMUM COOLING AND LUBRICATION
The paper discusses the problem of surface bearing capacity and the parameters that characterize it in the context of the assessment of functional features. The result of the tests that are concerning the verification of...
PROPERTIES OF WC-Cu ELECTRO SPARK COATINGS SUBJECTED TO LASER MODIFICATION
The article presents the possibilities of using laser surface modification on the way EDM to better tribological properties. The paper tries to expand knowledge in the fields of the application of electrospark deposition...