Study on wear transition mechanism and wear map of CL60 wheel material under dry and wet conditions

Guo, L.C.; Zhu, Wen; Shi, L.B.; Liu, Q.Y.; Cai, Zhenbing; Wang, W.J.

doi:10.1016/j.wear.2018.12.049

Cited by 22 publications

(13 citation statements)

References 24 publications

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“…In order to directly compare and analyze the relationship between wear loss and contact conditions, an energy approach has been extensively adopted [7,12,39,41], which involves plotting wear rate in μg/m/mm 2 against Tγ/A, where T is the tangential force at the contact interface in N, γ the creepage and A the contact area in mm 2 . Fig.…”

Section: Wear Regime Transitionmentioning

confidence: 99%

“…Besides, laboratory research and field tests presented excellent wear resistance and low RCF crack growth rate for the advanced R350HT and 400UHC rails [4,[7][8][9][10][11]. The standard U71Mn and U75V rails have been widely used and researched in Chinese railway networks [12,13], whereas few investigations on the wear and RCF performance of the Chinese advanced rail materials have been performed.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of wear and rolling contact fatigue behaviours of bainitic and pearlitic rails under various rolling-sliding conditions

Guo

Maiorino

et al. 2020

Wear

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Rolling-sliding wear experiments were performed to investigate the wear and rolling contact fatigue (RCF) behaviours of a premium pearlitic rail (PH), a carbon-free bainitic rail (BH) and two standard pearlitic rails (U71Mn and U75V). The wear regime and RCF damage evolution of the PH and BH materials in terms of Tγ/A (i.e. creepages and contact pressures) were compared and analyzed. The high-hardness BH steel presented a wear resistance similar to U71Mn and U75V rail materials, whereas lower wear rate was shown by the PH steel. Concerning the RCF performance, the damage of BH steel (comparable to U75V) was more severe than that of PH steel (comparable to U71Mn). Finally, with the increase in creepages and pressures, the wear and RCF damage of both PH and BH steels increased. These information could provide a guide in choosing rail materials and in development of bainitic rails.

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Section: Wear Regime Transitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of wear and rolling contact fatigue behaviours of bainitic and pearlitic rails under various rolling-sliding conditions

Guo

Maiorino

et al. 2020

Wear

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“…In recent years, many field and laboratory studies have been carried out to investigate the wear performances and damage behaviors of pearlitic rail and wheel steels [ 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. Ding et al [ 9 ] compared the wear loss and surface damage of pearlitic wheel steels under different rotational speeds.…”

Section: Introductionmentioning

confidence: 99%

“…Huang et al [ 10 ] considered that increasing normal force led to a rise in wear rate for pearlitic rail and wheel steels, and the crack angle became larger when the vertical force decreased. Guo et al [ 11 ] reported that with the increase in slip ratio and contact pressure, the surface damage of pearlitic wheel steel transformed from pitting to delamination under the dry condition. Field investigations on microstructural evolution at early tonnage accumulation were conducted by Benoît et al [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Dry Rolling/Sliding Wear of Bainitic Rail Steels under Different Contact Stresses and Slip Ratios

Liu

Zhang

et al. 2020

Materials

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This study aims to deeply understand the effect of contact stress and slip ratio on wear performances of bainitic rail steels. The results showed that the wear loss increased as the contact stress and slip ratio increased. Based on the surface damage morphology and microstructural analyses, it revealed that the rolling contact fatigue wear mechanism played a significant role under the low slip ratio, but the dominant wear mechanism transferred to the abrasive wear at the high slip ratio. Meanwhile, the bainitic steel specifically presented worse wear resistance under the abrasive wear mode. Compared with the influence of a slip ratio, the increase in contact stress led to severer plastic flows and contributed to the propagation of cracks. In addition, the contact stress and slip ratio had the opposite effect on the friction coefficient, that is, the friction coefficient of bainitic steels behaved the inverse proportion with the contact stress, but positive proportion with the slip ratio. At last, the increase in slip ratio had more significant effect on the reduction of retained austenite (RA) than the enlargement of contact stress due to the fact that the RA would probably be removed before the martensitic transformation occurred under the abrasive wear mechanism.

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“…To eliminate such brake damage, on-board braking distance regulators mounted on a locomotive are used on highways [7]. In the hump yards, application of this system is not possible, since under marshalling, cars are detached from the locomotive.…”

Section: Introductionmentioning

confidence: 99%

Skid adjuster for humps

Demyanov

Rybak

2019

E3S Web Conf.

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The paper based on the analysis of the working conditions of railway transport shows that, ceteris paribus, an increase in actual durability and mean time before failure of rolling stock units is obtained through maintenance of wheelsets, especially during logistic processes on nonmechanized humps. One of the main causes for the service life decrease of wheelsets is brake damage. To eliminate such brake damage on highways, on-board braking dis-tance regulators mounted on the locomotive are used. In the hump yards, using such systems is not possible, since under marshalling, cars are detached from the locomotive. In this regard, an industrial challenge turns up to design a similar in purpose braking distance regulator for humps through skidding. To solve this problem, we developed a method of controlling the speed of cars to be sorted, which complements the widely used technology of the shoe braking and avoids the formation of one-way sliders. The paper presents a skid adjuster, which excludes brake damage to the rolling stock wheels by the slides on the humps using the shoe braking techniques. The motion equation of the rolling stock equipped with a skid adjuster on the hump tracks is developed. In the result of this study, an equation of car motion in the system of “rolling stock Hughes regulator way” allowing to enter the working elements of Hughes controller to an existing and debugged algorithm of any slides with minimal change it.

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Study on wear transition mechanism and wear map of CL60 wheel material under dry and wet conditions

Cited by 22 publications

References 24 publications

Comparison of wear and rolling contact fatigue behaviours of bainitic and pearlitic rails under various rolling-sliding conditions

Comparison of wear and rolling contact fatigue behaviours of bainitic and pearlitic rails under various rolling-sliding conditions

Dry Rolling/Sliding Wear of Bainitic Rail Steels under Different Contact Stresses and Slip Ratios

Skid adjuster for humps

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