采用干法混料、一次成型模具制备不同含量Cu-Sn合金粉的摩擦材料,对样品进行理化性能、力学性能、摩擦性能及制动噪音的检测,借助SEM、XRD对试样摩擦表面进行表征,研究分析不同Cu-Sn合金粉含量对摩擦材料性能的影响.结果表明:随着铜锡合金粉含量的增加,摩擦材料的密度逐渐增加、气孔率略微升高、pH值基本保持不变;硬度先增后减,压缩量先减后增,剪切强度变化不大.低能载条件下,Cu-Sn合金粉对材料的摩擦因数影响不大,高能载条件下,适量Cu-Sn合金粉的加入能提高材料摩擦因数,降低磨损量,改善制动噪音.当铜锡合金粉含量为9％(质量分数)时,摩擦材料的综合性能最佳.
The automotive friction materials were manufactured by dry mixing and one-time mold,and the influences of Cu-Sn alloy powder content (mass fraction,％) on the physical and chemical properties,mechanical property,friction and wear properties were investigated,and the brake noise of the friction materials also was analyzed by scanning electron microscopy(SEM) and X-Ray Diffraction(XRD).The results indicate that the density increases gradually,the apparent porosity rises slightly,the Rockwell hardness value firstly increases and then decreases,the compression deformation firstly decreases and then increases,the pH value and the shear strength change little with the increase of Cu-Sn alloy powder content.The Cu-Sn alloy powder content has unconspicuous effect on the friction coefficient in the case of low energy load.But in the case of high energy load,the friction coefficient increases,the abrasion loss decreases and the occurrence of friction noise reduces with the increase of Cu-Sn alloy powder content.When the copper-tin alloy powder content is 9％ (mass fraction),the friction materials has the best properties.
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