Copper-based powder metallurgy friction material for high-speed train braking and preparation method thereof
A powder metallurgy and friction material technology, applied in the field of powder metallurgy materials, can solve the problems that cast iron and synthetic materials cannot meet the braking requirements of high-speed trains, and achieve good market prospects, excellent quality, and stable friction and wear performance
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Embodiment 1
[0026] A copper-based powder metallurgy friction material for high-speed train braking, including the following raw materials in weight percentage: 50% copper, 15% iron, 4% chromium, 8% zircon, 5% alumina, 3% tin, 3% manganese %, graphite 6%, molybdenum disulfide 3%, ferrochrome 3%.
[0027] The method for preparing the above-mentioned copper-based powder metallurgy friction material for high-speed train braking comprises the following steps:
[0028] (1) Ingredients: Weigh the powder raw materials according to the above weight percentage
[0029] (2) Mixing: Add 0.5% kerosene of the total weight of raw materials, and stir the raw materials evenly through a V-shaped mixer;
[0030] (3) Compression: the raw material mixture after stirring is pressed into compact under 250 Mpa;
[0031] (4) Sintering: Under the protection of hydrogen, the compact is sintered at a pressure of 1.5 MPa and a temperature of 850°C for 2 h at a high temperature, so that the compact is metallurgicall...
Embodiment 2
[0034] A copper-based powder metallurgy friction material for high-speed train braking, including the following raw materials in weight percentage: 45% copper, 17% iron, 5% chromium, 6% zircon, 4% alumina, 4% tin, 4% manganese %, graphite 7%, molybdenum disulfide 4%, ferrochrome 4%.
[0035] The method for preparing the above-mentioned copper-based powder metallurgy friction material for high-speed train braking comprises the following steps:
[0036] (1) Ingredients: Weigh the powder raw materials according to the above weight percentage
[0037] (2) Mixing: Add kerosene with a total weight of 0.3% of the raw materials, and stir the raw materials evenly through a V-shaped mixer;
[0038] (3) Compression: the raw material mixture after stirring is pressed into compact under 400 Mpa;
[0039] (4) Sintering: Under the protection of nitrogen, the green compact is sintered at a pressure of 4 MPa and a temperature of 900 °C for 4 h at a high temperature, so that the green compact...
Embodiment 3
[0042] A copper-based powder metallurgy friction material for high-speed train braking, including the following raw materials in weight percentage: 60% copper, 7% iron, 3% chromium, 6% zircon, 3% alumina, 4% tin, 2% manganese %, graphite 8%, molybdenum disulfide 2%, ferrochrome 5%.
[0043] The method for preparing the above-mentioned copper-based powder metallurgy friction material for high-speed train braking comprises the following steps:
[0044] (1) Ingredients: Weigh the powder raw materials according to the above weight percentage
[0045] (2) Mixing: Add kerosene with a total weight of 0.8% of the raw materials, and stir the raw materials evenly through a V-shaped mixer;
[0046] (3) Compression: the raw material mixture after stirring is pressed into compact under 550 Mpa;
[0047] (4) Sintering: Under the protection of hydrogen and nitrogen, the compact is sintered at a pressure of 3 MPa and a temperature of 950°C for 2 hours, so that the compact is metallurgically...
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