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Aluminum-based composite brake disc and manufacturing method

An aluminum-based composite material and brake braking technology, which is applied in the field of brake discs, can solve the problems of high brittleness, difficult processing, and high manufacturing costs, and achieve the effects of low density, improved strength and toughness, and reduced processing and manufacturing costs.

Active Publication Date: 2017-06-09
徐骏 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with traditional steel brake discs, this brake disc has a series of advantages such as low density, high specific strength and specific stiffness, small thermal expansion coefficient, good thermal conductivity and excellent wear resistance, but the overall use of this material has a large brittleness ( The elongation rate is almost zero), the processing is difficult, and the manufacturing cost is high, which is the main reason for restricting the large-scale use of this material in civil vehicles.

Method used

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  • Aluminum-based composite brake disc and manufacturing method
  • Aluminum-based composite brake disc and manufacturing method
  • Aluminum-based composite brake disc and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]Firstly, the aluminum alloy disc core is made of aluminum alloy A356 by semi-solid casting, and then the silicon carbide (SiC) particles are pretreated (grinding, screening, cleaning, drying), and then the silicon carbide particles are put into the electric furnace Roast at 1000-1100°C for 100 minutes and then cool naturally, heat aluminum alloy A356 to 665°C to melt, heat silicon carbide particles to 350°C, and stir while adding to the aluminum alloy melt to obtain a composite material. The range of silicon carbide particles is 3μm- 25μm, showing a normal distribution, the weight percentage is 23% of the particle reinforced aluminum matrix composite material, the stirring temperature is controlled at about 580°C, the stirring speed is 1000rpm, and the stirring time is 60 minutes. The stirred composite material is near the melting point of the aluminum alloy Quickly pour into the mold and cool to obtain the ingot of particle reinforced aluminum matrix composite material, ...

Embodiment 2

[0042] Firstly, the aluminum alloy disc core is made by high-pressure casting of aluminum alloy A357, and then the silicon carbide (SiC) particles are pretreated (grinding, screening, cleaning, drying and roasting at 1100°C), and the aluminum alloy A357 is heated to 700°C Melting, heating the silicon carbide particles to 325°C, adding them to the aluminum alloy melt while stirring to obtain a composite material, the silicon carbide particles range from 3 μm to 30 μm, and are normally distributed; the weight percentage is 20% of the particle-reinforced aluminum matrix composite material . The stirring temperature is controlled at about 590°C, the stirring speed is 1200rpm, and the stirring time is 80 minutes; the stirred composite material is quickly poured into the mold near the melting point of the aluminum alloy and cooled to obtain a particle-reinforced aluminum matrix composite ingot, and finally the core is placed Put it into the forming mold of the brake disc body, re-me...

Embodiment 3

[0044] Firstly, the aluminum alloy disc core is made by low-pressure casting of aluminum alloy A319, and then aluminum oxide (Al 2 o 3 ) particles for pretreatment (grinding, screening, cleaning, drying), heating the aluminum alloy A319 to 700°C to melt, heating the alumina particles to 400°C, adding them to the aluminum alloy melt while stirring to obtain a composite material, alumina The particle range is 3μm-30μm, and it is normally distributed; the weight percentage is 35% of the particle-reinforced aluminum matrix composite material. The stirring temperature is controlled at about 590°C, the stirring speed is 1500rpm, and the stirring time is 100 minutes; the stirred composite material is quickly poured into the mold near the melting point of the aluminum alloy and cooled to obtain a particle-reinforced aluminum matrix composite ingot, and finally the core is placed Put it into the forming mold of the brake disc body, re-melt the prepared particle-reinforced aluminum mat...

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Abstract

The invention discloses an aluminum-based composite brake disc, comprising a disc body, wherein the disc body comprises a composite structure formed by a disc core and a friction layer covering the disc core, the disc core is made of aluminum alloy, and the friction layer is made of a particle reinforced aluminum-based composite material. The non-friction surface (disc core) of the brake disc is casted by using the aluminum alloy with good ductility and toughness, the friction surface (friction layer) is casted by using the particle reinforced aluminum-based composite material based on the disc core, and the brake disc having the interior made of the aluminum alloy and the surface made of the particle reinforced aluminum-based composite material is finally formed. The brake disc has the advantages of low density, high specific strength and specific rigidity, small thermal expansion coefficient, good heat conductivity, excellent wearability and the like, besides, the toughness of the brake disc during assembly is improved, the machining cost is reduced, and the service reliability of the brake disc is improved.

Description

technical field [0001] The invention belongs to brake discs, in particular to an aluminum-based composite material brake disc and a preparation method thereof. [0002] technical background [0003] In the field of traffic technology, brake discs are crucial for effective braking of vehicles. The traditional materials of foreign brake discs are HT20-40, HT25-47, HT30-54. Foreign countries have successively developed and tried vermicular graphite cast iron discs, alloy cast steel and forged steel brake discs. The development of brake disc materials in China started relatively late, and materials such as ordinary cast iron, Ni-Cr-Mo alloy cast iron, HT20-40, HT30-54, QT40-10, Cr-Mo cast iron, and special cast iron have been used successively. Due to the development of the transportation industry and the lightweight requirements, the research on the materials of brake discs in the world has gradually developed from ordinary cast iron, ordinary carbon steel, low alloy cast iron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D65/12F16D69/02C22C32/00B22D19/16C22C21/00C22C1/03C22C1/10
CPCB22D19/16C22C1/1005C22C1/1036C22C21/00C22C32/0005C22C32/0036C22C32/0047C22C32/0057C22C32/0063C22C32/0068F16D65/122F16D65/125F16D65/127F16D69/02
Inventor 徐骏李大普
Owner 徐骏
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