Effects of segment-structured DLC film on the fretting wear of railway axle journal bearings

Fretting wear is surface damage caused by repeated slight relative slips between two contact surfaces. In railway applications, fretting wear can occur between the inner ring and the backing ring of an axle journal tapered roller bearing. The authors supposed that the fretting wear of the backing ri...

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Autores principales:	Yoshiaki OKAMURA, Daisuke SUZUKI, Kazuki IKOMA, Takafumi NAGATOMO, Hiroshi UTSUNOMIYA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2018
Materias:	bearing fretting wear diamond-like carbon segment-structure Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/1fbeee2c09d64530a4bc28e3833cbe57
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spelling	oai:doaj.org-article:1fbeee2c09d64530a4bc28e3833cbe572021-11-29T05:34:42ZEffects of segment-structured DLC film on the fretting wear of railway axle journal bearings2187-974510.1299/mej.18-00446https://doaj.org/article/1fbeee2c09d64530a4bc28e3833cbe572018-12-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/6/1/6_18-00446/_pdf/-char/enhttps://doaj.org/toc/2187-9745Fretting wear is surface damage caused by repeated slight relative slips between two contact surfaces. In railway applications, fretting wear can occur between the inner ring and the backing ring of an axle journal tapered roller bearing. The authors supposed that the fretting wear of the backing ring can be prevented by means of hard-film coatings if hard films can follow the deformation of the backing ring. A segment-structured diamond-like carbon (S-DLC) film has been proposed to solve this problem. In this work, the authors investigated the effect of S-DLC film on the fretting wear through rotation tests of full-scale railway axle bearings with the backing ring side face coated with S-DLC film or conventional continuous diamond-like carbon (C-DLC) film. As the result, the S-DLC film coated backing ring demonstrated less wear compared to the C-DLC film coated backing ring. In addition, the iron content of the grease in the bearing with the S-DLC film coated backing ring was lower than that of the grease in the bearing with the C-DLC film coated backing ring. It is conceivable that the relative sliding motion in the radial direction between them may be restrained by the latticed pattern of the S-DLC film being pressed into the inner ring large side face. It is concluded that the S-DLC film is effective in suppressing the fretting wear generated on the contact surfaces between them of the axle bearings.Yoshiaki OKAMURADaisuke SUZUKIKazuki IKOMATakafumi NAGATOMOHiroshi UTSUNOMIYAThe Japan Society of Mechanical Engineersarticlebearingfrettingweardiamond-like carbonsegment-structureMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 6, Iss 1, Pp 18-00446-18-00446 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	bearing fretting wear diamond-like carbon segment-structure Mechanical engineering and machinery TJ1-1570
spellingShingle	bearing fretting wear diamond-like carbon segment-structure Mechanical engineering and machinery TJ1-1570 Yoshiaki OKAMURA Daisuke SUZUKI Kazuki IKOMA Takafumi NAGATOMO Hiroshi UTSUNOMIYA Effects of segment-structured DLC film on the fretting wear of railway axle journal bearings
description	Fretting wear is surface damage caused by repeated slight relative slips between two contact surfaces. In railway applications, fretting wear can occur between the inner ring and the backing ring of an axle journal tapered roller bearing. The authors supposed that the fretting wear of the backing ring can be prevented by means of hard-film coatings if hard films can follow the deformation of the backing ring. A segment-structured diamond-like carbon (S-DLC) film has been proposed to solve this problem. In this work, the authors investigated the effect of S-DLC film on the fretting wear through rotation tests of full-scale railway axle bearings with the backing ring side face coated with S-DLC film or conventional continuous diamond-like carbon (C-DLC) film. As the result, the S-DLC film coated backing ring demonstrated less wear compared to the C-DLC film coated backing ring. In addition, the iron content of the grease in the bearing with the S-DLC film coated backing ring was lower than that of the grease in the bearing with the C-DLC film coated backing ring. It is conceivable that the relative sliding motion in the radial direction between them may be restrained by the latticed pattern of the S-DLC film being pressed into the inner ring large side face. It is concluded that the S-DLC film is effective in suppressing the fretting wear generated on the contact surfaces between them of the axle bearings.
format	article
author	Yoshiaki OKAMURA Daisuke SUZUKI Kazuki IKOMA Takafumi NAGATOMO Hiroshi UTSUNOMIYA
author_facet	Yoshiaki OKAMURA Daisuke SUZUKI Kazuki IKOMA Takafumi NAGATOMO Hiroshi UTSUNOMIYA
author_sort	Yoshiaki OKAMURA
title	Effects of segment-structured DLC film on the fretting wear of railway axle journal bearings
title_short	Effects of segment-structured DLC film on the fretting wear of railway axle journal bearings
title_full	Effects of segment-structured DLC film on the fretting wear of railway axle journal bearings
title_fullStr	Effects of segment-structured DLC film on the fretting wear of railway axle journal bearings
title_full_unstemmed	Effects of segment-structured DLC film on the fretting wear of railway axle journal bearings
title_sort	effects of segment-structured dlc film on the fretting wear of railway axle journal bearings
publisher	The Japan Society of Mechanical Engineers
publishDate	2018
url	https://doaj.org/article/1fbeee2c09d64530a4bc28e3833cbe57
work_keys_str_mv	AT yoshiakiokamura effectsofsegmentstructureddlcfilmonthefrettingwearofrailwayaxlejournalbearings AT daisukesuzuki effectsofsegmentstructureddlcfilmonthefrettingwearofrailwayaxlejournalbearings AT kazukiikoma effectsofsegmentstructureddlcfilmonthefrettingwearofrailwayaxlejournalbearings AT takafuminagatomo effectsofsegmentstructureddlcfilmonthefrettingwearofrailwayaxlejournalbearings AT hiroshiutsunomiya effectsofsegmentstructureddlcfilmonthefrettingwearofrailwayaxlejournalbearings
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Effects of segment-structured DLC film on the fretting wear of railway axle journal bearings

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