| C/hBN润滑组元对铜基粉末冶金摩擦材料性能的影响 |
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| 引用本文： | 吴 深,刘洪坤,管英杰,司屈钒,樊江磊,刘建秀.C/hBN润滑组元对铜基粉末冶金摩擦材料性能的影响[J].有色金属工程,2023(1):38-47. |
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| 作者姓名： | 吴 深 刘洪坤 管英杰 司屈钒 樊江磊 刘建秀 |
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| 作者单位： | 郑州轻工业大学,郑州轻工业大学,郑州轻工业大学 机电工程学院,郑州轻工业大学 机电工程学院,郑州轻工业大学 机电工程学院,郑州轻工业大学 机电工程学院 |
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| 基金项目： | 国家自然科学基金委-河南省联合(U1904175)；河南省科技攻关计划项目(222102230056) |
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| 摘 要： | 为改善高温下材料摩擦性能的稳定性和提高润滑组元与铜基体的界面结合效果,采用粉末冶金工艺制备了C/hBN作为润滑组元的铜基粉末冶金摩擦材料,研究了C/hBN含量和化学镀铜表面改性对摩擦材料显微结构、力学性能和摩擦磨损性能的影响。结果表明:适量添加hBN作为润滑组元能提高材料的摩擦系数和热稳定性,当C/hBN质量分数比为6∶3时,材料具有较高的摩擦系数,在350 km/h制动速度下其摩擦系数高达0.472,且磨损量相对较低,具有相对较好的综合性能;C/hBN表面镀铜后,摩擦材料的致密度提高,硬度略微下降,整体摩擦系数更加稳定,与未镀铜相比其磨损量降低了28%。C/hBN颗粒表面镀铜改善了C/hBN-Cu的界面结合,制动时摩擦表面的剥落坑数量明显减少。石墨和hBN润滑组元的综合运用及表面镀铜处理可有效提高铜基摩擦材料的摩擦磨损性能,有利于制动闸片轻量化设计,为C/hBN在铜基摩擦材料中的应用提供工艺理论依据。
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| 关 键 词： | 铜基摩擦材料 粉末冶金 润滑组元 表面改性 |
| 收稿时间： | 2022/6/30 0:00:00 |
| 修稿时间： | 2022/7/29 0:00:00 |
Influence of C/hBN Lubricating Components on Properties of Copper-based Powder Metallurgy Friction Materials |
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| WU Shen,LIU Hongkun,GUAN Yingjie,SI Qufan,FAN Jianglei and LIU Jianxiu.Influence of C/hBN Lubricating Components on Properties of Copper-based Powder Metallurgy Friction Materials[J].Nonferrous Metals Engineering,2023(1):38-47. |
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| Authors: | WU Shen LIU Hongkun GUAN Yingjie SI Qufan FAN Jianglei and LIU Jianxiu |
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| Affiliation: | Institute of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry,Institute of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry,Institute of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry,Institute of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry,Institute of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry,Institute of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry |
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| Abstract: | In order to improve the stability of the friction performance of the material at high temperature and increase the interfacial bonding effect of the lubricating component and the copper matrix, the powder metallurgy process was used to prepare the copper-based powder metallurgy friction material with C/hBN as the lubricating component. In this paper, the effects of C/hBN content and surface modification of electroless copper plating on the microstructure, mechanical properties and friction and wear properties of friction materials were investigated. The results show that proper addition of hBN as lubricating component can improve the friction coefficient and thermal stability of the material. When the mass ratio of C/hBN is 6:3, the friction coefficient of the material is as high as 0.472 at the braking speed of 350km/h, the wear amount is relatively low, and the material has relatively good comprehensive properties. After copper plating on the surface of C/hBN, the density of friction material increases, the hardness decreases slightly, the overall friction coefficient is more stable, and the wear amount decreases by 28% compared with that without copper plating. Copper plating on the surface of C/hBN particles improves the interface bonding of C/hBN-Cu, and the number of peeling pits on the friction surface decreases obviously during braking. The comprehensive application of graphite and hBN lubricating components and surface copper plating treatment can effectively improve the friction and wear performance of copper-based friction materials, which is conducive to the lightweight design of brake pads and provides a theoretical basis for the application of C/hBN in copper-based friction materials. |
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| Keywords: | copper-based friction materials powder metallurgy lubricating component surface modification |
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