付传起,李省君,黄亚忠,林永威.镀铜石墨含量对Fe-25Cu基摩擦材料组织结构及摩擦性能的影响[J].表面技术,2023,52(2):245-253.
FU Chuan-qi,LI Sheng-jun,HUANG Ya-zhong,LIN Yong-wei.Effect of Copper Plated Graphite Content on Microstructure and Tribological Properties of Fe-25Cu-based Friction Materials[J].Surface Technology,2023,52(2):245-253 |
| 镀铜石墨含量对Fe-25Cu基摩擦材料组织结构及摩擦性能的影响 |
| Effect of Copper Plated Graphite Content on Microstructure and Tribological Properties of Fe-25Cu-based Friction Materials |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.02.022 |
| 中文关键词: Fe-25Cu基体 石墨 镀铜石墨 摩擦因数 磨损率 |
| 英文关键词:Fe-25Cu matrix graphite copper-plated graphite friction coefficient wear rate |
| 基金项目: |
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| Author | Institution |
| FU Chuan-qi | School of Mechanical Engineering,Liaoning Dalian 116622, China |
| LI Sheng-jun | School of Physical Science and Technology, Dalian University, Liaoning Dalian 116622, China |
| HUANG Ya-zhong | School of Physical Science and Technology, Dalian University, Liaoning Dalian 116622, China |
| LIN Yong-wei | School of Physical Science and Technology, Dalian University, Liaoning Dalian 116622, China |
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| 中文摘要: |
| 目的 为改善石墨与铜铁基摩擦材料的结合方式，探究不同含量的镀铜石墨对铜铁基摩擦材料组织结构的影响，并研究加入不同含量的镀铜石墨时，摩擦材料的摩擦性能和摩擦机理。方法 采用热压烧结法制备Fe-25Cu基摩擦材料，利用扫描电镜、X射线衍射等表征手段进行表征，并利用摩擦磨损试验机测试摩擦材料的摩擦性能，分析摩擦因数。摩擦试验后的材料利用扫描电镜进行表面观测，分析摩擦磨损机理。计算材料摩擦后的磨损量，以此分析镀铜石墨含量对摩擦材料的影响。结果 相同转速下随着镀铜石墨含量的增加，平均摩擦因数降低，当镀铜石墨的质量分数为9%时，摩擦因数曲线最平稳;随着镀铜石墨含量的增加，摩擦因数逐渐降低，磨损率先减少后增加。当加入9%的镀铜石墨时，该材料的摩擦性能最好，此时材料的摩擦因数为0.436，磨损率最低为0.023 mm;黏着磨损和磨粒磨损是添加镀铜石墨的摩擦材料的主要摩擦机理。结论 在Fe-25Cu基摩擦材料中镀铜石墨与基体的结合情况优于石墨与基体的结合，同时加入镀铜石墨Fe-25Cu基摩擦材料的摩擦因数高，磨损量小。 |
| 英文摘要: |
| In this experiment, the graphite of the conventional lubrication element was replaced by copper-plated graphite, the effect of different contents of copper-plated graphite on the organization of copper-iron friction materials was investigated, and the friction properties and friction mechanism of the friction materials were investigated when adding different contents of copper-plated graphite, and compared with the friction materials with graphite. The friction properties and friction mechanisms of the friction materials were investigated with the addition of different contents of copper-plated graphite and compared with those of graphite. The Fe-25Cu-based friction materials were prepared by powder metallurgy cold pressing method (pressure:500 MPa, holding pressure 5 min; sintering temperature 1 150 ℃, heating 60 min, holding time 60 min), and the friction properties of the friction materials were tested by scanning electron microscopy, X-ray diffraction and other characterization mean. 500 r/min, 1 000 r/min, and 1 500 r/min, respectively, with a normal load of 20 N and a sliding time of 1 000 s, and the friction coefficient was analyzed. The material after the friction test is observed on the surface using a scanning electron microscope to analyze the friction and wear mechanism. The amount of wear of the material after friction was calculated as a way to analyze the effect of the graphite content when copper was plated on the friction properties of the friction material. The experimental results show that the average friction coefficient decreases with the increase of copper-plated graphite content at the same speed, and the friction coefficient curve is smoothest when the content of copper-plated graphite is 9wt.%; the friction coefficient decreases gradually with the increase of copper-plated graphite content, and the wear is the first to decrease and decreases to the minimum value when the content of copper-plated graphite is 9wt.% and the wear rate increases when the content of copper-plated graphite continues to increase. Compared with the addition of graphite in the friction material, the friction material can maintain a higher friction coefficient when adding copper-plated graphite, and the friction coefficient is more stable; at 1 500 r/min speed, when adding 9wt.% of copper-plated graphite, the material has the best friction performance, the friction coefficient of the material is 0.436 at this time, and its wear rate is the lowest 0.023 mm; when adding 3wt.%-12wt.%, the wear mechanism of the friction material of copper-plated graphite is mainly two kinds of adhesion wear and abrasive wear. The friction mechanism is abrasive wear and peeling wear when the graphite content is 3wt.%-9wt.%, and adhesive wear occurs when the graphite content is 12wt.%. Copper-plated graphite and collective bonding with a metal transition layer, while graphite and the substrate belong to the mechanical occlusion, so the bonding of copper-plated graphite and the substrate is better while adding copper-plated graphite Fe-25Cu-based friction material maintains a higher coefficient of friction, at the same speed and the same graphite and copper-plated graphite content, Fe-25Cu friction material with the addition of copper-plated graphite wear less, and its friction performance The friction performance is better than that of graphite-added friction materials. |
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