Analysis on the effects of rotational speed of grinding stone on removal behavior of rail material

被引：52
|
作者：
Gu, K. K. [1 ]
Lin, Q. [1 ]
Wang, W. J. [1 ]
Wang, H. Y. [1 ]
Guo, J. [1 ]
Liu, Q. Y. [1 ]
Zhu, M. H. [1 ]
机构：
[1] Southwest Jiaotong Univ, State Key Lab Tract Power, Tribol Res Inst, Chengdu 610031, Peoples R China
来源：
WEAR | 2015年 / 342卷
基金：
中国国家自然科学基金;
关键词：
Rail grinding; Grinding rotational speed; Removal behavior; Wear debris; CORRUGATION;
D O I：
10.1016/j.wear.2015.08.008
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The grinding process for maintaining the railroad rails can affect their performance. A rail grinding friction testing apparatus was developed to investigate the effects of rotational speed of grinding stone on removal behavior of rail material. The rail-grinding stone contact consists of a round, flat grinding stone and two test specimens made from Mn-steel rails that are pressed against the face of the stone. The effects of grinding wheel rotational speed on the abrasive removal mechanism of rail material are explored in detail. The results indicate that as the grinding wheel rotational speed increases, the friction coefficient, the surface roughness of rail specimens and the width of the wear grooves decrease. The grinding wear volume, the rnicroindentation hardness of the rail specimens and the surface temperature-rise all increase as the number of grinding cycles increase. Wear debris collected during the test is composed of round particles and curled cutting chips. The debris is mainly composed of Fe3O4, FeO and Fe. As grinding rotational speed increases, the content of Fe3O4 and FeO increases but the width of the cutting chips decreases. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：52 / 59
页数：8
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