Cargando…
Wear Behavior of Ductile Iron Wheel Material Used for Rail-Transit Vehicles under Dry Sliding Conditions
A ductile iron wheel used for a rail-transit vehicle was treated with a recommended heat-treatment process. The ductile iron wheel after heat treatment was composed of graphite nodules and tempered sorbite with an area fraction of 98%. A friction test of the ductile iron and carbon steel wheel mater...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7344663/ https://www.ncbi.nlm.nih.gov/pubmed/32545535 http://dx.doi.org/10.3390/ma13122683 |
_version_ | 1783555997083631616 |
---|---|
author | Tong, Lifeng Zou, Qingchuan Jie, Jinchuan Li, Tingju Wang, Zhixin |
author_facet | Tong, Lifeng Zou, Qingchuan Jie, Jinchuan Li, Tingju Wang, Zhixin |
author_sort | Tong, Lifeng |
collection | PubMed |
description | A ductile iron wheel used for a rail-transit vehicle was treated with a recommended heat-treatment process. The ductile iron wheel after heat treatment was composed of graphite nodules and tempered sorbite with an area fraction of 98%. A friction test of the ductile iron and carbon steel wheel materials was systematically performed under different normal loads and sliding velocities. The results indicated that the wear mechanism of the ductile iron wheel changed from adhesion to abrasion with an increase in the normal load level. Adhesion was the main wear mechanism at different sliding velocities and normal load level. The impact of the normal load on the wear mechanism was greater than that of the sliding velocity. Since the ductile iron wheel material had excellent thermal property and higher carbon content, it exhibited a lower wear rate, a smaller difference value of the friction coefficient, and plastic deformation on the worn surface than those of the carbon steel wheel material. This indicates that ductile iron wheels may have a longer wear life, greater traction, and higher stability during operation than carbon steel wheels. The iron wheels have the potential for being applied in rail-transit vehicles. |
format | Online Article Text |
id | pubmed-7344663 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-73446632020-07-09 Wear Behavior of Ductile Iron Wheel Material Used for Rail-Transit Vehicles under Dry Sliding Conditions Tong, Lifeng Zou, Qingchuan Jie, Jinchuan Li, Tingju Wang, Zhixin Materials (Basel) Article A ductile iron wheel used for a rail-transit vehicle was treated with a recommended heat-treatment process. The ductile iron wheel after heat treatment was composed of graphite nodules and tempered sorbite with an area fraction of 98%. A friction test of the ductile iron and carbon steel wheel materials was systematically performed under different normal loads and sliding velocities. The results indicated that the wear mechanism of the ductile iron wheel changed from adhesion to abrasion with an increase in the normal load level. Adhesion was the main wear mechanism at different sliding velocities and normal load level. The impact of the normal load on the wear mechanism was greater than that of the sliding velocity. Since the ductile iron wheel material had excellent thermal property and higher carbon content, it exhibited a lower wear rate, a smaller difference value of the friction coefficient, and plastic deformation on the worn surface than those of the carbon steel wheel material. This indicates that ductile iron wheels may have a longer wear life, greater traction, and higher stability during operation than carbon steel wheels. The iron wheels have the potential for being applied in rail-transit vehicles. MDPI 2020-06-12 /pmc/articles/PMC7344663/ /pubmed/32545535 http://dx.doi.org/10.3390/ma13122683 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Tong, Lifeng Zou, Qingchuan Jie, Jinchuan Li, Tingju Wang, Zhixin Wear Behavior of Ductile Iron Wheel Material Used for Rail-Transit Vehicles under Dry Sliding Conditions |
title | Wear Behavior of Ductile Iron Wheel Material Used for Rail-Transit Vehicles under Dry Sliding Conditions |
title_full | Wear Behavior of Ductile Iron Wheel Material Used for Rail-Transit Vehicles under Dry Sliding Conditions |
title_fullStr | Wear Behavior of Ductile Iron Wheel Material Used for Rail-Transit Vehicles under Dry Sliding Conditions |
title_full_unstemmed | Wear Behavior of Ductile Iron Wheel Material Used for Rail-Transit Vehicles under Dry Sliding Conditions |
title_short | Wear Behavior of Ductile Iron Wheel Material Used for Rail-Transit Vehicles under Dry Sliding Conditions |
title_sort | wear behavior of ductile iron wheel material used for rail-transit vehicles under dry sliding conditions |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7344663/ https://www.ncbi.nlm.nih.gov/pubmed/32545535 http://dx.doi.org/10.3390/ma13122683 |
work_keys_str_mv | AT tonglifeng wearbehaviorofductileironwheelmaterialusedforrailtransitvehiclesunderdryslidingconditions AT zouqingchuan wearbehaviorofductileironwheelmaterialusedforrailtransitvehiclesunderdryslidingconditions AT jiejinchuan wearbehaviorofductileironwheelmaterialusedforrailtransitvehiclesunderdryslidingconditions AT litingju wearbehaviorofductileironwheelmaterialusedforrailtransitvehiclesunderdryslidingconditions AT wangzhixin wearbehaviorofductileironwheelmaterialusedforrailtransitvehiclesunderdryslidingconditions |