Aluminum-based composite material vehicle brake disc preparation method

An aluminum-based composite material and automobile braking technology, which is applied in the field of automobile brake discs, can solve problems such as liquid fluidity and difficulty in preparing brake disc components, and achieve low production costs, good high temperature stability, and easy batch production Effect

Active Publication Date: 2018-03-06
深圳优越科技新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the content of ceramic particles increases, its dispersion in aluminum liquid and the fluidity of the liquid during composite casting will become difficult, which makes it difficult to prepare aluminum matrix composites with medium and high ceramic content and their brake discs that meet the requirements member

Method used

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  • Aluminum-based composite material vehicle brake disc preparation method
  • Aluminum-based composite material vehicle brake disc preparation method
  • Aluminum-based composite material vehicle brake disc preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment provides a preparation method of an aluminum-based composite material automobile brake disc, comprising the following steps:

[0039] The silicon carbide was added to the hydrofluoric acid aqueous solution, then washed with deionized water and suction filtered; then added to the sodium hydroxide solution for alkali washing, washed with deionized water, suction filtered, and finally placed in a drying oven at 100°C The silicon carbide particles were placed in a box-type resistance furnace, heated to 800° C., kept for 1 hour, and cooled to room temperature with the furnace.

[0040] Add 5Kg of A356 aluminum alloy into the crucible, raise the temperature to 620°C, and when all the aluminum is melted, add 1.5Kg of silicon carbide particles with an average particle size of 10 μm, and start stirring. The stirring temperature is 600°C, the stirring speed is 500rmp, and the stirring time is It lasted for 1 hour; after the stirring, the temperature was inc...

Embodiment 2

[0048] The present embodiment provides a preparation method of an aluminum-based composite material automobile brake disc, comprising the following steps:

[0049] The silicon carbide was added to the hydrofluoric acid aqueous solution, then washed with deionized water and suction filtered; then added to sodium hydroxide solution for alkali washing, washed with deionized water, suction filtered, and finally placed in a drying oven at 200 ° C The silicon carbide particles are placed in a box-type resistance furnace, heated to 1200 ° C, kept for 2 hours, and cooled to room temperature with the furnace.

[0050] Add 5Kg A356 aluminum alloy into the crucible, raise the temperature to 710°C, and when all the aluminum is melted, add 4.8Kg silicon carbide particles with an average particle size of 30 μm, and start stirring. The stirring temperature is 750°C, the stirring speed is 2000rmp, and the stirring time is It lasted for 2 hours; after the stirring, the temperature was increase...

Embodiment 3

[0058] The present embodiment provides a preparation method of an aluminum-based composite material automobile brake disc, comprising the following steps:

[0059] The silicon carbide was added to the hydrofluoric acid aqueous solution, then washed with deionized water and suction filtered; then added to sodium hydroxide solution for alkali washing, washed with deionized water, suction filtered, and finally placed in a drying oven at 200 ° C The silicon carbide particles are placed in a box-type resistance furnace, heated to 1200° C., maintained for 1 hour, and cooled to room temperature with the furnace.

[0060] Add 5Kg A356 aluminum alloy into the crucible, raise the temperature to 700°C, and when all the aluminum is melted, add 3.2Kg silicon carbide particles with an average particle size of 30μm, and start stirring. The stirring temperature is 680°C, the stirring speed is 2000rmp, and the stirring time is It lasted for 2 hours; after the stirring, the temperature was incr...

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Abstract

The invention provides an aluminum-based composite material vehicle brake disc preparation method, which comprises: 1) pretreatment of reinforcement particles; 2) composite fusion casting; and 3) machining and heat treatment. According to the present invention, the volume content of the ceramic reinforcement body in the aluminum-based composite material is high (20-45%), and the near-final moldingof the aluminum-based composite material vehicle brake disc can be achieved through the composite fusion casting method; the method has advantages of simple and efficient process, low preparation cost and mass production; the weight of the prepared aluminum-based composite material vehicle brake disc is reduced by 50-60% compared to the weight of the cast iron brake disc, the thermal conductivityof the prepared aluminum-based composite material vehicle brake disc is improved by more than 2 times, and the prepared aluminum-based composite material vehicle brake disc has good high-temperaturewear resistance; and the wear of the prepared aluminum-based composite material vehicle brake disc is only 0.33-0.36 mm after the vehicle provided with the prepared aluminum-based composite material vehicle brake disc drives 20000 km, such that the aluminum-based composite material vehicle brake disc is expected to replace the cast iron vehicle brake disc, and can provide assistance for the lightweight of the vehicle.

Description

technical field [0001] The invention relates to the field of automobile brake discs, in particular to a preparation method of an aluminum-based composite material automobile brake disc. Background technique [0002] With the rapid development of the automobile industry, while bringing convenience and comfort to human life, energy and environmental problems also arise. Vehicle lightweighting is one of the important measures to achieve energy saving and emission reduction, which is of great significance to the sustainable development of the automobile industry. An important way to reduce the weight of automobiles is to replace the original steel materials with lightweight materials such as aluminum-based and magnesium-based. [0003] Automobile brake disc is an important part of automobile braking system, and it is mostly made of cast iron at present. On the one hand, the high density of cast iron is not conducive to lightweight; on the other hand, the thermal conductivity o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C1/10C22C32/00B23P15/18
CPCC22C1/026C22C1/03C22C1/1005C22C1/1036C22C32/0005C22C32/0036C22C32/0063B23P15/18C22C1/1047
Inventor 欧阳求保黄宇欧阳杰武
Owner 深圳优越科技新材料有限公司
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