Page 119 - 《摩擦学学报》2020年第3期

第 40 卷 第 3 期 摩 擦 学 学 报 Vol 40 No 3
2020 年 5 月 Tribology May, 2020

DOI: 10.16078/j.tribology.2019219

磨石强度对钢轨打磨行为的影响

1
1
1
2*
章武林 , 樊小强 , 张鹏飞 , 袁永杰 , 朱旻昊 1,2
(1. 西南交通大学机械工程学院 摩擦学研究所，四川 成都 610031;
2. 西南交通大学材料科学与工程学院 材料先进技术教育部重点实验室，四川 成都 610031)
摘 要: 磨石强度直接关系到钢轨打磨车的持续作业能力和磨削效率，因此研究磨石强度对打磨行为及钢轨表面质
量的影响，对于现场磨石的优选具有重要参考价值. 参照Vossloh磨石抗压强度，制备了三种不同抗压强度的磨石
(GS-10，68.9 MPa；GS-12.5，95.2 MPa；GS-15，122 MPa)并开展相应的打磨试验和表征. 结果显示，GS-15相对GS-
10打磨量降幅约80%，但磨削比增幅约88%，表明磨石强度增大，磨石耐磨性提高，但磨削能力下降. 磨石和钢轨表
面形貌显示，磨石强度增大导致磨石自锐性变差，磨削机制逐渐从切削转变为耕犁. 打磨钢轨表面SEM、EDS、
XPS分析结果表明磨粒的切削作用是导致磨削热产生的首要因素，且随着磨石强度的增大，钢轨表面烧伤程度降
2+
3+
低，钢轨表面氧化产物中Fe 含量上升而Fe 含量下降. 钢轨剖面金相结果表明：磨石强度增大导致钢轨表面白层、
塑性变形层厚度增加，使钢轨产生更严重的预疲劳. 因此，对钢轨打磨磨石强度的合理调控和选择，对于协调打磨
效率和钢轨表面质量具有重要意义.
关键词: 钢轨打磨; 磨石; 抗压强度; 打磨机制; 表面质量
中图分类号: TG580.64; TH145.9 文献标志码: A 文章编号: 1004-0595(2020)03–0385–10

Probing the Effect of Grinding Stone Strength on Rail
Grinding Behavior

1 2* 1 1 1,2
ZHANG Wulin , FAN Xiaoqiang , ZHANG Pengfei , YUAN Yongjie , ZHU Minhao

(1. Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University,
Sichuan Chengdu 610031, China
2. Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials
Science and Engineering, Southwest Jiaotong University, Sichuan Chengdu 610031, China)
Abstract: The strength of the grinding stone (GS) has a significant effect on the sustainable operational capacity and
grinding efficiency of grinding car, thus probing the effect of grinding stone strength on grinding behavior and rail
surface quality will be beneficial for the selection of grinding stone on the field. According to the compressive strength
of the Vossloh GS used on the field, three GSs (GS-10, 68.9 MPa; GS-12.5, 95.2 MPa and GS-15, 122.7 MPa) were
prepared to carry out grinding experiments, and the corresponding characterizations were applied to analyze the surface
morphologies of GSs and ground rails. The results showed that the GS-15 had a decrease of 80% on grinding volume but
an increase of 88% on grinding ratio comparing with the GS-10. The results indicated that the improvement of GS
strength produced a promotion of wear resistance and a reduction of grinding ability. The surface morphologies of GSs
and rail samples showed that the improvement of GS strength resulted in a worse self-sharpening which caused the main
grinding mechanism changing from cutting to ploughing. The results of SEM, EDS and XPS of the ground rail surface

Received 5 November 2019, revised 6 December 2019, accepted 27 December 2019, available online 28 May 2020.
*Corresponding author. E-mail: fxq@home.swjtu.edu.cn，Tel: +86-13880489329.
The project was supported by the National Natural Science Foundation of China (51705435) and Key Project of Sichuan Department
of Science and Technology (2018JZ0048).
国家自然科学基金项目(51705435)和四川省自然科学基金项目(2018JZ0048)资助.