造粒炭黑含量对Cu-Fe摩擦材料性能的影响

Effect of Granulated Carbon Black Content on Properties of Cu-Fe Friction Material

采用干压擦筛造粒法制备了炭黑造粒颗粒,研究了炭黑造粒颗粒含量(质量分数)对Cu-Fe摩擦材料显微组织、力学性能、摩擦性能的影响。结果表明:炭黑造粒颗粒易被压制成条状形态,当炭黑造粒颗粒质量分数较低时,其与金属基体能形成完整的界面,而含量较高时界面易出现孔洞和裂纹;随着炭黑造粒颗粒质量分数的增加,摩擦材料的力学性能先增加后降低、摩擦系数和磨损量均先降低后增加。当炭黑造粒颗粒质量分数为5%时,摩擦材料的力学性能最大,摩擦系数最低,磨损量最小,材料的综合性能最佳。

The carbon black granulated granules were prepared by dry pressing and sieving granulation. The effects of the mass fraction of carbon black on the microstructure, mechanical properties and tribological properties of Cu-Fe friction materials were studied. The results indicate that the carbon black granulated granules can be easily pressed into strip shape. When the mass fraction of granulated carbon black is low, it can form a complete interface with the metal matrix, and when the content is high, the interface is prone to form holes and cracks. With the increase of the mass fraction of granulated carbon black, the friction coefficient and the wear loss initially decrease and then increase, while the bending strength and compressive strength of the material show an opposite trend. In particular, when the mass fraction of the granulated carbon black is 5%, the friction material exhibits the highest mechanical properties, the lowest friction coefficient, the minimum wear loss and the best comprehensive performance.