利用高比热钾长石提高树脂基摩擦材料抗热衰退性能的研究

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采用干法热压工艺制备不同钾长石含量的树脂基摩擦材料，通过D―MS定速式摩擦磨损试验机，研究高比热钾长石对其制品摩擦磨损性能的影响，并借助扫描电子显微镜（SEM）观察、分析试样磨损后的表面形貌及磨屑特征。结果表明：在钾长石掺量分别为0、9％、18％、27％、36％、45％的6种树脂基摩擦材料试样中，掺量为27％试样的综合性能最佳，其在350℃下摩擦因数（μ）为0．356，磨损率（V）为0．404×10^-7cm^3／（N?m），而参比样在同温度下u零退到0．212，V高达0．996×10^-7cm^3／（N?m），树脂基摩擦材料抗热衰退性能的提高是由于钾长石的加入提高了其比热容。降低了试样受摩擦力作用时的温度。 The resin-based friction materials of the different potash feldspar content were prepared by heat-press molding method. The effect of high specific heat potash feldspar on friction and wear performance of resin-based friction materials was studied by the D-MS friction tester. The characteristics of wear surfaces and wear debris were observed and analyzed by Scanning electronmicroscope （SEM）. The results show that with varying amount of potash feldspar （0, 9%, 18%, 27%, 36% and 45%） in the six resin-based friction materials, potash feldspar contents （27%） proved to have best combination of performance properties, coefficient of friction （μ） and wear rate respectively are 0.356 and 0.404×10^-7cm3/（N?m） at 350℃, but the reference sample μ declines to 0.212 and the wear rate reaches to 0.996×10^-7cm^3/（N?m） at the same temperature. The analysis pointed out that the improvement of heat-resistance fades property is due to the potash feldspar which increased heat capacity of resin-based friction materials, lowered the temperature of samples in the braking process and improved the resin-based composites resisting thermal decay effectively.