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利用粉末冶金技术制备出铜基粉末冶金摩擦材料,研究在干摩擦条件下,制动能量和摩擦组元Cr含量变化对铜基粉末冶金摩擦材料摩擦磨损性能及磨损图的影响.根据线磨损量的变化,构建出以制动能量和摩擦组元Cr含量为变量的线磨损量图,主要包含三个区域:低磨损区、中磨损区和高磨损区,并建立出各区域边界转变方程;结合磨损表面、亚表面以及磨屑形貌的观察与分析,确定线磨损量图中各区域的主导磨损机理,由此建立出对应线磨损量图的磨损机理图,即犁削和轻微氧化磨损(低磨损区);严重氧化磨损和犁削(中磨损区);剥层磨损(高磨损区).希望该磨损图为含Cr铜基粉末冶金摩擦材料的实际应用提供一定的理论参考.
The copper-based powder metallurgy friction material was prepared by powder metallurgy technology, and the influence of brake energy and Cr content on friction and wear properties and wear pattern of copper-based powder metallurgy friction material under dry friction condition was studied. , A graph of the wear amount of the brake with energy of braking and the content of Cr in the frictional component as a variable is established. It mainly includes three areas: low wear area, medium wear area and high wear area, and establishes the boundary transformation equation of each area. Combined with the observation and analysis of the wear surface, subsurface and wear debris morphology, the dominant wear mechanism of each region in the line wear figure is determined, and the wear mechanism diagram of the corresponding wear line diagram is established, that is, the plow and slight oxidation wear (Low wear zone), severe oxidative wear and plowing (middle wear zone), wear layer (high wear zone) .It is hoped that the wear diagram will provide some theoretical references for the practical application of Cr-based copper-based powder metallurgy friction material.