(1. 中南大學(xué) 粉末冶金國家重點實驗室，長沙 410083；
2. 湖南博云汽車制動材料有限公司，長沙 410205)
摘 要: 采用干法混料、一次成型模具制備不同含量Cu-Sn合金粉的摩擦材料，對樣品進(jìn)行理化性能、力學(xué)性能、摩擦性能及制動噪音的檢測，借助SEM、XRD對試樣摩擦表面進(jìn)行表征，研究分析不同Cu-Sn合金粉含量對摩擦材料性能的影響。結(jié)果表明：隨著銅錫合金粉含量的增加，摩擦材料的密度逐漸增加、氣孔率略微升高、pH值基本保持不變；硬度先增后減，壓縮量先減后增，剪切強度變化不大。低能載條件下，Cu-Sn合金粉對材料的摩擦因數(shù)影響不大，高能載條件下，適量Cu-Sn合金粉的加入能提高材料摩擦因數(shù)，降低磨損量，改善制動噪音。當(dāng)銅錫合金粉含量為9%(質(zhì)量分?jǐn)?shù))時，摩擦材料的綜合性能最佳。
關(guān)鍵字: 銅錫合金粉；摩擦材料；摩擦性能; 制動噪音
（1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. Hunan Boyun Automobile Brake Material Co., Ltd, Changsha 410205, China）
Abstract: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.
Key words: copper-tin alloy powder; friction materials; friction performance; brake noise
