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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

Active Publication Date: 2017-05-17
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

Experimental program
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 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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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 380 km / 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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