石墨含量对铜基摩擦材料摩擦磨损性能的影响

胡铮; 张楠; 张万昊; 杜建华; 韩俊姣; 纪箴

doi:10.19591/j.cnki.cn11-1974/tf.2020050007

石墨含量对铜基摩擦材料摩擦磨损性能的影响

doi: 10.19591/j.cnki.cn11-1974/tf.2020050007

胡铮¹,
张楠²,
张万昊¹,
杜建华²,
韩俊姣²,
纪箴^2, ,

1.
中国北方车辆研究所, 北京 100072
2.
北京科技大学材料科学与工程学院, 北京 100083

基金项目:

换档操纵元件疲劳寿命设计技术研究 237099000000170004

详细信息

通讯作者:
纪箴, E-mail: jizhen@mater.ustb.edu.cn

中图分类号: TF125.9
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- 被引次数: 0
出版历程
- 收稿日期: 2020-04-23
- 刊出日期: 2020-12-27

Effect of graphite content on friction and wear properties of copper-based friction materials

1.
China North Vehicle Research Institute, Beijing 100072, China
2.
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

More Information

Corresponding author: JI Zhen, E-mail: jizhen@mater.ustb.edu.cn

摘要

摘要: 采用粉末冶金压烧技术制备了含不同质量分数石墨的铜基摩擦材料，研究了石墨含量对摩擦材料微观组织、磨损性能和磨损机理的影响。结果表明：铜基体的连续性随石墨含量增加而降低，动摩擦系数随石墨含量的增加先增加后降低，磨损量随着石墨含量的增加而减小；材料的磨损机理为犁沟式磨料磨损；石墨质量分数为16%时，试样动摩擦系数和静摩擦系数最高并且稳定，具有最好的摩擦磨损性能。
- 铜基摩擦材料 /
- 粉末冶金 /
- 石墨 /
- 摩擦磨损 /
- 摩擦机理
Abstract: Copper-based friction materials with graphite in the different mass fraction were prepared by powder metallurgy sintering technology. The effects of graphite content on the microstructure, wear properties, and wear mechanism of the friction materials were studied. The results show that, with the increase of graphite content, the copper matrix continuity decreases, the dynamic friction coefficient increases first and then decreases, and the abrasion loss decreases. The wear mechanism of the friction material is plough-type abrasive wear. When the graphite mass fraction is 16%, the dynamic friction coefficient and the static friction coefficient are the highest and stable, showing the best friction and wear properties.
- copper-based friction material /
- powder metallurgy /
- graphite /
- friction and wear /
- wear mechanism

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图 1 平行于摩擦表面显微组织：（a）A1；（b）A2；（c）A3；（d）A4

Figure 1. Microstructure parallel to the friction surface: (a) A1;(b) A2;(c) A3;(d) A4

下载: 全尺寸图片幻灯片

图 2 横截面显微组织：（a）A1；（b）A2；（c）A3；（d）A4

Figure 2. Microstructure of the cross-section: (a) A1;(b) A2;(c) A3;(d) A4

下载: 全尺寸图片幻灯片

图 3 接合次数对动摩擦系数的影响

Figure 3. Influence of joints number on the coefficient of dynamic friction

下载: 全尺寸图片幻灯片

图 4 接合次数对静摩擦系数的影响

Figure 4. Influence of joints number on the coefficient of static friction

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图 5 不同石墨含量铜基摩擦材料的磨损率

Figure 5. Wear rate of the copper-based friction materials with different graphite content

下载: 全尺寸图片幻灯片

图 6 不同石墨含量铜基摩擦材料显微组织：（a）A1；（b）A2；（c）A3；（d）A4

Figure 6. Microstructure of the copper-based friction materials with different graphite content: (a) A1;(b) A2;(c) A3;(d) A4

下载: 全尺寸图片幻灯片

表 1 实验用铜基粉末冶金摩擦材料化学成分（质量分数）

Table 1. Chemical composition of the copper-based frictionmaterials by powder metallurgy used in experiment %

试样编号 Cu 合金元素二氧化硅石墨

A1 余量 16 3 10

A2 余量 16 3 12

A3 余量 16 3 16

A4 余量 16 3 20

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表 2 摩擦磨损试验参数

Table 2. Friction and wear test parameters

转速/(r·min^-1) 压力/MPa 油温/℃ 惯量/(kg·m²) 接合次数/次油流量/(mL·min^-1·cm^-2)

2370 2 75~80 0.376 1500 0.37

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