摘要
设计了新型钢轨打磨摩擦试验机,实现了钢轨-磨石相互作用的摩擦学模拟试验,研究了不同打磨参数下的钢轨-磨石界面的摩擦系数、表面粗糙度、磨损量及硬度等变化情况.结果表明:随磨石粒度增加,打磨钢轨表面粗糙度和磨损量呈减小趋势;增加磨石转速导致摩擦系数和表面粗糙度减小,打磨钢轨磨损量和表面硬度增加;随打磨压力增加,摩擦系数和表面粗糙度呈减小趋势,但磨损量和表面硬度增加;打磨钢轨表面存在明显的犁沟,随磨石粒度减小犁沟变宽;所设计钢轨打磨摩擦试验机可用来评价不同参数下钢轨-磨石界面相互作用的摩擦学行为.
A new rail grinding friction testing apparatus has been designed. It is applicable for the simulation experiment on tribology of interactions between rail and grinding stone. The study for the difference of friction coefficient,roughness,wear mass,hardness under the different grinding parameters can be included. The results show that the roughness and wear mass of rail specimens had a tendency to decrease with the increase of the granularity of grinding stones. With the increase of the grinding rotational speed,the friction coefficient and the roughness decreased and the wear mass and the hardness of the rail specimens increased. With the increase of the pressure,the friction coefficient and the roughness had a tendency to decrease and the wear mass and the hardness of the specimens increased. Obvious ploughing on the surface of specimens was observed. The ploughing marks became wider with the decrease of the granularity of grinding stones. This apparatus can evaluate the tribological behavior of interaction between rail and grinding stone under different parameter conditions.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2015年第2期154-159,共6页
Tribology
基金
国家自然科学基金项目(51275430)
高速铁路线路工程教育部重点实验室开放基金(2014-HRE-02)
中央高校基本科研业务费专项资金(SWJTU12CX037)资助~~
关键词
钢轨打磨
磨石
摩擦学行为
试验参数
rail grinding,grinding stone,tribological behavior,experimental parameters
