Abstract:
Railway transportation is an important mode of transportation in the industrialization process of our country. With the improvement of speed, higher requirements are put forward for brake materials. This study analysed the current imported high-speed railway brake pads, then obtained the specific components and the ratios of each component. Based on this imported formula, a process scheme was formulated. With the combination of the hot pressing sintering process, the performance was further optimized. The test results show that the content of Cu in the matrix of the imported material sample is 50%, and Fe is 23%; in the lubricating component, the content of carbon(flake graphite and agglomerated graphite) is 15%, and MoS2 is 2%; the ratio of the Fe-Cr alloy in the friction component is 10%. Domestic raw materials were used for the above ratio of imported sample, and a series of process steps such as mixing, pre-forming, and hot pressing sintering were carried out to successfully prepare the sample.Compared with the imported sample, and the density of the self-prepared sample is 5.29g/cm3, which is better than the imported sample of 4.5g/cm3, the bending strength is 48.77MPa, which is higher than the imported sample of 38MPa, and the compressive strength is 88.42MPa, which is slightly lower than the imported sample of 95MPa.Based on the above analysis, the copper-iron based friction material for high-speed railway can be self-prepared, and the performance meets or exceeds the imported indicators.