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Light weight wear-resistant aluminum-based powder metallurgy composite material rail traffic brake disc and preparation method thereof

An aluminum-based composite material and rail transit technology, applied in the field of rail transit brake disc preparation, can solve problems such as failure to meet braking requirements, non-wearable brake discs, and unfavorable environmental protection, so as to save machining costs and reduce Good effect of weight and compactness

Active Publication Date: 2020-06-09
湖南湘投轻材科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the trend of lightweight rail transit equipment and the defects of the existing rail transit brake disc preparation technology, the purpose of the present invention is to provide a light, wear-resistant aluminum-based composite rail transit brake disc, which solves the problem of traditional Cast iron brake discs have high energy consumption and are not conducive to environmental protection, and the brake discs made of pure aluminum-based powder metallurgy composite materials are not wear-resistant and cannot meet the braking requirements

Method used

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  • Light weight wear-resistant aluminum-based powder metallurgy composite material rail traffic brake disc and preparation method thereof
  • Light weight wear-resistant aluminum-based powder metallurgy composite material rail traffic brake disc and preparation method thereof
  • Light weight wear-resistant aluminum-based powder metallurgy composite material rail traffic brake disc and preparation method thereof

Examples

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Effect test

Embodiment 1

[0042] A method for preparing an aluminum-based powder metallurgy composite material rail transit brake disc according to the present embodiment is implemented according to the following steps: 1. 4.5% Cu, 3.5% Mg, 1.5% Si, 0.2% Sr, 0.3 % Ce, 30% SiC and 60% aluminum powder (the above are mass fractions) are added to the mixer, and mixed at a speed of 20r / min for 60min to obtain a wear-resistant aluminum-based composite material powder; 2. Step 1 The treated wear-resistant aluminum matrix composite powder is filled into a cold-pressing mold, and cold-pressed at a pressure of 200 MPa, a pressurization rate of 2mm / s, and a holding time of 8s; The disc body is sintered under the protection of nitrogen (generally the oxygen content in nitrogen is less than 10PPM, and the dew point temperature is lower than -40°C). At a heating rate of 10°C / min, the temperature is first raised to 450°C, kept for 20 minutes, and then heated to 620°C , keep warm for 30 minutes, and finally cool down ...

Embodiment 2

[0045] A kind of aluminum-based powder metallurgy composite rail transit brake disc preparation method of the present embodiment is implemented according to the following steps: 1. 5% Fe, 2% Mg, 1% Ni, 0.5% Ce, 40 % of SiC and 51.5% of aluminum powder (above all are mass fractions) are added to the mixer, and mixed at a speed of 20r / min for 50min to obtain wear-resistant aluminum matrix composite material powder; 2. the wear-resistant aluminum processed in step one Fill the base composite material powder into the cold pressing mold, and carry out cold pressing, the pressure is 250MPa, the pressurization rate is 2mm / s, and the holding time is 10s; 3. The rail transit brake disc green body processed in step 2 is placed in nitrogen Sintering is carried out under protection (generally the oxygen content in nitrogen is less than 10PPM, and the dew point temperature is lower than -40°C). At a heating rate of 10°C / min, the temperature is first raised to 460°C, kept for 20 minutes, the...

Embodiment 3

[0050] A method for preparing an aluminum-based powder metallurgy composite material rail transit brake disc according to the present embodiment is implemented according to the following steps: 1. 5% Si, 5% Fe, 0.5% Ce, 0.5% Sn, 60 % of SiC and 29% of aluminum powder (above all are mass fractions) are added to the mixer, mixed at a speed of 20r / min for 50min to obtain wear-resistant aluminum matrix composite material powder; 2. the wear-resistant aluminum processed in step one Fill the base composite material powder into the cold pressing mold, and carry out cold pressing, the pressure is 250MPa, the pressurization rate is 2mm / s, and the holding time is 10s; 3. The rail transit brake disc green body processed in step 2 is placed in nitrogen Sintering is carried out under protection (generally the oxygen content in nitrogen is less than 10PPM, and the dew point temperature is lower than -40°C). At a heating rate of 10°C / min, the temperature is first raised to 460°C, kept for 20 ...

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Abstract

The invention discloses a light weight wear-resistant aluminum-based powder metallurgy composite material rail traffic brake disc and a preparation method thereof. The rail traffic brake disc is prepared from an aluminum-based powder metallurgy composite material through cold press molding, sintering and integrated hot pressing shaping processes. The prepared rail traffic brake disc has a series of advantages of no damage, no defect, good compactness, high strength and the like, and can meet braking and wear-resisting demands of the rail traffic brake disc well. Meanwhile, compared with a conventional cast iron brake disc, the weight is reduced by 40-60%, so that energy consumption is saved greatly, and the demand on energy conservation and emission reduction in China is met. The rail traffic brake disc is simple in preparation method, low in cost and high in rate of finished products. The preparation method can be used for preparing rail traffic brake discs of various dimensions and structures, and meet the industrial continuous production demand on a large scale.

Description

technical field [0001] The invention relates to a rail transit brake disc, in particular to a rail transit brake disc prepared by using a light wear-resistant aluminum-based powder metallurgy composite material, and also relates to a light wear-resistant aluminum-based composite material formed by cold pressing The invention discloses a method for preparing rail transit brake discs by combining processes of sintering and hot-press shaping, belonging to the technical field of rail transit brake disc preparation. Background technique [0002] Lightweight is one of the most effective means to realize energy saving and consumption reduction of rail transit vehicles. Traditional transportation equipment engines, brake discs, etc. are made of ferrous metal materials, mainly including cast iron, cast steel and forged steel, etc., which have high density, poor thermal conductivity, and are prone to defects such as thermal cracks. Therefore, the use of high-performance light metal m...

Claims

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Application Information

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IPC IPC(8): B22F3/02B22F3/10B22F3/14B22F3/24B22F1/00B22F5/00C22C21/00C22C32/00C22C29/06F16D65/12
CPCB22F1/0003B22F3/02B22F3/1007B22F3/1021B22F3/14B22F3/24B22F5/00C22C21/00C22C32/0063C22C29/065C22C29/067F16D65/125B22F2003/247B22F2998/10B22F2999/00F16D2200/006F16D2200/0026F16D2200/003F16D2200/0039F16D2200/0082B22F2201/02C22C1/0416C22C29/12C22C29/16C22C32/0036C22C32/0068B22F5/106B60T17/043B61H5/00C22C29/005C22C32/0005C22C32/0047B22F1/10B22F3/10
Inventor 霍树海曹柳絮
Owner 湖南湘投轻材科技股份有限公司
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