Tribological behaviour of microalloyed and conventional C–Mn rail steels in a pure sliding condition

Viesca, J.L.; González-Cachón, S; Garcı́a, Agustı́n Costa; González, R.; Battez, A. Hernández

doi:10.1177/0954409718765063

Cited by 6 publications

(5 citation statements)

References 31 publications

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“…The atmospheric conditions (temperature and relative humidity) and iron oxides formation could also influence on friction in wheel-rail contact using microalloyed steel due to its less tendency to form oxides and lower corrosion rate than the common C-Mn rail steel. With the exception of a previous paper of the authors, 19 to the best of our knowledge, no studies have examined the effect of environmental conditions (temperature and humidity) on coefficient of friction using microalloyed steels.…”

Section: Introductionmentioning

confidence: 92%

“…Pins to be used in tribological tests were manufactured from microalloyed rail steel (profile 115RE) and R260 grade C-Mn rail steel (profile 54E1) in accordance with a previous work. 19 Discs were manufactured from R260 grade C-Mn rail steel, as its properties are similar to that of the wheels' material. 20 The mechanical properties of the tested steels are shown in Table 1.…”

Section: Experimental Procedures Materialsmentioning

confidence: 99%

“…Mechanical properties of tested steels[19]. Statistical methods such as frequency tables were used to further study the coefficient of friction behaviour.…”

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confidence: 99%

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Influence of environmental conditions and oxidation on the coefficient of friction using microalloyed rail steels

Viesca

González-Cachón

Garcı́a

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part F:

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In railway systems, certain atmospheric conditions – mainly related to temperature and relative humidity – lead to the creation of iron oxides which can affect the coefficient of friction between the wheel and the rail. This can result in increased wear of the rail, reducing its service life and thus increasing replacement costs. Pin-on-disc tests were conducted in a climate chamber to study the influence of environmental conditions and iron oxides on the coefficient of friction. The iron oxides generated on the surface of specimens extracted from microalloyed rail steel during wear tests were analysed using X-ray diffraction. The results show that hematite (α-Fe2O3) is the predominant iron oxide among all the oxides generated on the worn surfaces. It was further noted that the oxide layer resulting from the rise in both temperature and relative humidity does not significantly affect the average coefficient of friction for each steel samples tested. High relative humidity combined with high temperature leads to the formation of α-Fe2O3, which tends to increase the coefficient of friction. However, a boundary lubrication effect is observed at higher relative humidity due to a condensed water film, which reduces the coefficient of friction and counteracts the increase of the coefficient of friction expected due to the presence of hematite.

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Section: Introductionmentioning

confidence: 92%

Section: Experimental Procedures Materialsmentioning

confidence: 99%

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Influence of environmental conditions and oxidation on the coefficient of friction using microalloyed rail steels

Viesca

González-Cachón

Garcı́a

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…For E36 marine steel, Nb reduces the impact toughness of HAZ during the thermal welding cycle [18], and the effect of niobium on the mechanical properties of HAZ with high heat input is unclear. However, to obtain good quality and lower production costs, adding Nb as a microalloying element is widely used to improve the mechanical properties of marine steel [19]. A previous study has shown that as Nb concentration increases, the austenite grains become finer [20].…”

Section: Introductionmentioning

confidence: 99%

A Parameterized Leblond–Devaux Equation for Predicting Phase Evolution during Welding E36 and E36Nb Marine Steels

El-Fallah

Qing

et al. 2023

Materials

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High heat input welding can improve welding efficiency, but the impact toughness of the heat-affected zone (HAZ) deteriorates significantly. Thermal evolution in HAZ during welding is the key factor affecting welded joints’ microstructures and mechanical properties. In this study, the Leblond–Devaux equation for predicting phase evolution during the welding of marine steels was parameterized. In experiments, E36 and E36Nb samples were cooled down at different rates from 0.5 to 75 °C/s; the obtained thermal and phase evolution data were used to construct continuous cooling transformation diagrams, which were used to derive the temperature-dependent parameters in the Leblond–Devaux equation. The equation was then used to predict phase evolution during the welding of E36 and E36Nb; the quantitative experimental phase fractions of the coarse grain zone were compared with simulated results to verify the prediction results, which are in good agreement. When heat input is 100 kJ/cm, phases in the HAZ of E36Nb are primarily granular bainite, whereas for E36, the phases are mainly bainite with acicular ferrite. When heat input increases to 250 kJ/cm, ferrite and pearlite form in both steels. The predictions agree with experimental observations.

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“…The pearlitic steels containing thin interlamellar spacing possess high hardness, strength, and wear resistance. Because of the special mechanical properties, high-strength pearlitic steels are the vital materials used in manufacturing rails [1][2][3][4]. Researchers [5][6][7][8] have demonstrated that the hardness and strength of pearlitic steels have a Hall-Patch relationship with the pearlite interlamellar spacing.…”

Section: Introductionmentioning

confidence: 99%

Wear behaviour and microstructure evolution of pearlitic steels under block-on-ring wear process

Wang

Zhang

Sun

et al. 2019

Materials Science and Technology

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Three kinds of pearlitic steels containing different interlamellar spacing and mechanical properties were obtained by different heat treatments. The wear behaviours of the steels and evolution of microstructures under different wear conditions were analysed by block-on-ring wear tests. The results showed that shortening air-cooling time and accelerating cooling rate after rolling dramatically refined the pearlite interlamellar spacing and then enhanced the hardness and strength of the pearlitic steels. The pearlitic steel with a high strength of 1537 MPa was obtained and exhibited the best wear resistance than others. The deformed and fractured cementite in the subsurface layer partially spheroidised induced by deformation and frictional heating. A special layer containing spherical carbide formed and reduced the wear rate of the steel.

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Tribological behaviour of microalloyed and conventional C–Mn rail steels in a pure sliding condition

Cited by 6 publications

References 31 publications

Influence of environmental conditions and oxidation on the coefficient of friction using microalloyed rail steels

Influence of environmental conditions and oxidation on the coefficient of friction using microalloyed rail steels

A Parameterized Leblond–Devaux Equation for Predicting Phase Evolution during Welding E36 and E36Nb Marine Steels

Wear behaviour and microstructure evolution of pearlitic steels under block-on-ring wear process

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