Rolling-contact fatigue and wear resistance of hard coatings on bearing-steel substrates

Erdemir, Ali

doi:10.1016/b978-0-444-89900-2.50087-7

Cited by 5 publications

(4 citation statements)

References 34 publications

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“…A general conclusion of previous studies 1,2 was that the extent of fatigue life improvements in bearing steel substrates is dictated by several parameters such as the thicknesses and adhesion of the hard coatings. Most of the hard coatings (0.2-1 mm thick) performed well in rolling contact.…”

Section: Introductionmentioning

confidence: 99%

Fatigue life of TiN and CrN coatings in rolling contact

Vera

Vite-Torres

Gallardo

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this study, experimental tests to assess rolling contact fatigue in uncoated and coated steel substrates with TiN and CrN coatings are presented. A thrust bearing tester was used. The tests were carried out in lubricated conditions at 1560 r/min, using a contact pressure of 2.09 GPa. The surface damage was analyzed by optical microscopy, scanning electron microscopy, and energy dispersive spectroscopy. The substrates coated with CrN showed a fatigue life above 100 million cycles. On the other hand, with TiN, the time for crack nucleation was much shorter, approximately 60 × 104 cycles.

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Section: Introductionmentioning

confidence: 99%

Fatigue life of TiN and CrN coatings in rolling contact

Vera

Vite-Torres

Gallardo

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…In case of heavy-duty load capability, roller bearings are generally preferable as compared to the ball bearing because of the larger rolling element contact area (Palmgren, 1959). In cylindrical roller bearing, the main cause of failure is due to the rolling contact fatigue (RCF) (Erdemir, 1999). RCF is known as flaking off of the metallic substances from the raceways and/or rolling element surfaces.…”

Section: Introductionmentioning

confidence: 99%

Development of a mathematical model to determine optimum hollowness in layered cylindrical hollow rolling element using FE analysis

Solanki

Vakharia

2018

ILT

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Purpose The purpose of this paper is to develop a mathematical model to determine optimum hollowness of a layered cylindrical hollow rolling element when it contacts with a flat plate. Design/methodology/approach In this work, finite element analysis (FEA) is carried out for different hollowness percentages ranging from 10 to 90 layered cylindrical hollow rolling elements corresponding to five standard NU 22 series bearings, i.e. 2206, 2210, 2215, 2220 and 2224. An experimental investigation is carried out for the NU 2206-layered cylindrical hollow roller bearing (LCHRB) at optimum hollowness under static loading condition. Findings Different parameters, such as bending stress (von Mises stress at the bore of the roller), von Mises stress, contact pressure and deflection in loaded contact are presented here. Originality/value The value of this research work is the development of a generalized solution that can be used to find the exact value of optimum hollowness for the layered cylindrical hollow rolling element, which is dependent on the yield strength of the material and the geometry of the roller under static loading condition. A static load test rig is designed to observe the load carrying capacity of the LCHRB as compared to the hollow cylindrical roller bearing.

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“…Currently sintered materials are used as structural parts for production of certain machine parts. It is assumed (and the first results prove it) that the use of coating methods also improve specific properties of these materials, for example wear resistance, contact fatigue and so on [10][11][12].…”

Section: Introductionmentioning

confidence: 99%