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Copper-based powder metallurgy friction material for high-speed train braking and preparation method thereof

A technology of powder metallurgy and high-speed trains, 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 the effects of good market prospects, excellent quality, and good comprehensive mechanical properties

Active Publication Date: 2015-11-18
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The brake pads in the braking system of high-speed trains are one of the key components for the safe operation of high-speed trains. During the braking process of high-speed trains, the highest instantaneous temperature generated by the brake pads during braking can reach 600-1000°C. The friction and wear performance requirements of braking materials are very strict, and traditional cast iron and synthetic materials cannot meet the braking requirements of high-speed trains

Method used

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Examples

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Comparison scheme
Effect test

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 250Mpa;

[0031] (4) Sintering: Under the protection of hydrogen, the compact is sintered at a pressure of 1.5Mpa and a temperature of 850°C for 2 hours at a high temperature, so that the compact is metallurgica...

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 400Mpa;

[0039] (4) Sintering: Under the protection of nitrogen, the compact is sintered at a pressure of 4Mpa and a temperature of 900°C for 4h under high pressure and high temperature, so that the comp...

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 550Mpa;

[0047] (4) Sintering: Under the protection of hydrogen and nitrogen, the compact is sintered at a pressure of 3Mpa and a temperature of 950°C for 2 hours at a high temperature, so that the compac...

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Abstract

The invention provides a copper-based powder metallurgy friction material for high-speed train braking. The copper-based powder metallurgy friction material comprises, by weight percentage, 40%-60% of copper, 7%-20% of iron, 3%-5% of chromium, 5%-10% of zirconite, 3%-6% of aluminum oxide, 2%-5% of tin, 2%-4% of manganese, 5%-10% of graphite, 2%-5% of molybdenum disulfide and 1%-5% of ferrochromium. A preparation method of the copper-based powder metallurgy friction material comprises the steps of proportioning, mixing, pressing, sintering and the like. The copper-based powder metallurgy friction material has excellent friction performance and stable and safe braking performance, and can meet the braking requirement of a 380 km / h high-speed train. The preparation method is simple and environmentally friendly, and has a good market prospect.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy materials, in particular to a copper-based powder metallurgy friction material for high-speed train braking and a preparation method thereof. Background technique [0002] High-speed railway is an emerging strategic industry that is prioritized in the 12th Five-Year Plan and the 13th Five-Year Plan. After more than 20 years of development in my country's high-speed train technology research and construction, through technology introduction, digestion, absorption and innovation, we have successively mastered the manufacturing technology of high-speed trains with speeds of 200, 250 and 380km / h. [0003] The brake pads in the braking system of high-speed trains are one of the key components for the safe operation of high-speed trains. During the braking process of high-speed trains, the highest instantaneous temperature generated by the brake pads during braking can reach 600-1000°C. The f...

Claims

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Application Information

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IPC IPC(8): C22C30/04C22C9/00C22C1/05B22F1/00B22F7/06
Inventor 尹彩流王秀飞文国富蓝奇
Owner GUANGXI UNIV FOR NATITIES
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