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Gradient aluminum-based composite material as well as preparation method and application thereof

An aluminum-based composite material, gradient technology, applied in the field of composite materials, can solve the problem of connecting friction surface and supporting structure, unable to enhance the control of material content, etc.

Active Publication Date: 2022-01-21
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

In order to take into account the heat dissipation, wear resistance and manufacturing cost of the existing aluminum-based composite brake discs, the disc cap and supporting structure are usually made of aluminum alloy materials, and the friction surface is made of aluminum-based composite materials. Rotating discs usually have problems with the connection between the friction surface and the support structure, as well as thermal expansion between different materials
[0003] In order to reduce the problem of thermal expansion between different materials, centrifugal casting technology has been used to form a gradient distribution of reinforcement materials in the matrix material, but this method can only form a continuous gradient distribution of reinforcement materials, and cannot be based on the desired location. Properties control the content of reinforcement materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Provide molten A component aluminum alloy, A component aluminum alloy consists of 4.5% copper, 0.15% manganese, 1.2% magnesium, 0.3% chromium, 0.15% titanium, 0.5% silicon, 0.5% zirconium , 0.5% cerium and the balance aluminum;

[0033] (2) Provide molten B-component aluminum alloy, B-component aluminum alloy consists of 0.4% copper, 0.15% manganese, 1.2% magnesium, 0.3% chromium, 0.15% titanium, 6.5% silicon, 0.5% zirconium , 0.5% cerium and the balance aluminum;

[0034] (3) After removing impurities from the surface of SiC particles, calcinate them at 1000°C for 3 hours in an air atmosphere, and then soak them in hydrogen peroxide (concentration: 30%) and hydrochloric acid (concentration: 5mol / L) with a volume ratio of 1:1.5 for 1 to 3 hours. Hours later, wash with water until neutral, and then use mainly 20g / L SnCl 2 2H 2 O, 40ml / L of concentrated hydrochloric acid and 50g / L of sensitizing solution composed of tin particles, and finally at 25 ° C, using 100g / ...

Embodiment 2

[0040] (1) Provide molten A component aluminum alloy, A component aluminum alloy consists of 4.9% copper, 0.15% manganese, 0.8% magnesium, 0.35% chromium, 0.15% titanium, 0.8% silicon, 0.5% zirconium , 0.5% cerium and the balance aluminum;

[0041] (2) Provide molten B-component aluminum alloy, B-component aluminum alloy consists of 0.4% copper, 0.15% manganese, 1.2% magnesium, 0.35% chromium, 0.15% titanium, 6.5% silicon, 0.5% zirconium , 0.5% cerium and the balance aluminum.

[0042] (3) After removing impurities from the surface of SiC particles, calcinate them at 1000°C for 3 hours in an air atmosphere, soak them in hydrogen peroxide and hydrochloric acid with a volume ratio of 1:1.5 for 1 to 3 hours, wash them with water until neutral, and then use mainly 10g / L SnCl 2 2H 2 O. Sensitization solution composed of 20ml / L concentrated hydrochloric acid and 50g / L tin particles, finally at 25°C, using 80g / L sodium acetate, 200g / L ammonium chloride and 15g / L chlorine An elec...

Embodiment 3

[0048] (1) Provide molten A component aluminum alloy, A component aluminum alloy consists of 1.8% copper, 0.15% manganese, 1.2% magnesium, 0.04% chromium, 0.15% titanium, 0.4% silicon, 0.5% zirconium , 0.5% cerium and the balance aluminum;

[0049] (2) Provide molten B-component aluminum alloy, B-component aluminum alloy consists of 0.15% copper, 0.15% manganese, 0.8% magnesium, 0.04% chromium, 0.15% titanium, 7.5% silicon, 0.5% zirconium , 0.5% cerium and the balance aluminum;

[0050] (3) After removing impurities from the surface of SiC particles, calcinate them at 800°C for 6 hours in an air atmosphere, soak them in hydrogen peroxide and hydrochloric acid with a volume ratio of 1:1, wash them with water until neutral, and then use mainly 40g / L SnCl 2 2H 2 O. Sensitization solution composed of 50ml / L concentrated hydrochloric acid and 50g / L tin particles, and finally at 10℃~35℃, use 150g / L sodium acetate, 300g / L ammonium chloride and 40g / L An electroless plating soluti...

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PUM

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Abstract

The invention relates to a gradient aluminum-based composite material as well as a preparation method and application thereof. According to the preparation method of the gradient aluminum-based composite material, aluminum-based composite material ingots with different silicon carbide contents are softened and then subjected to die forming, then the aluminum-based composite material ingots are stacked in sequence and then subjected to thixoforming, silicon carbide particles can be distributed in a gradient mode of 45%, 35%, 10%, 5%, 35% and 45%, good metallurgical bonding is formed between adjacent layers, and interface bonding is firm. The gradient aluminum-based composite material prepared by the method is used as an automobile brake disc, not only has good mechanical properties such as high-temperature strength, hardness and wear resistance, but also can effectively control the expansion and contraction capacity of the brake disc, and avoids brake shake and the like of the brake disc.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a gradient aluminum-based composite material, its preparation method and application. Background technique [0002] The brake disc is a disc-shaped moving part with the end plane as the friction working surface. It forms a brake friction pair with the brake pad, which plays a vital role in the vehicle braking system. Traditional brake discs are mostly made of gray cast iron or ductile cast iron and processed by turning. These cast iron discs are relatively heavy, and are prone to wear and dust during braking, and the cast iron is prone to rust, which not only creates a visual impression of poor quality, but also produces annoying noises aurally. Aluminum-based composites are heterogeneous mixtures based on aluminum and its alloys and reinforced by metal, non-metallic particles, whiskers or fibers. They have low density, good electrical and thermal conductivity, speci...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/02C22C21/02C22C21/14C22C21/16C22C32/00B22D18/02B22D19/16
CPCC22C1/1036C22C21/14C22C21/16C22C21/02C22C1/101C22C32/0063B22D18/02B22D19/16
Inventor 高平平刘春轩曹柳絮蒋兆汝刘石亮伍智敏吴云戴青松谢屹梁啟文
Owner 湖南湘投轻材科技股份有限公司