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Silicon carbide particle reinforced aluminum-based composite material as well as preparation method and application thereof

A technology of silicon carbide particles and reinforced aluminum base, applied in the direction of brake discs, mechanical equipment, brake types, etc., can solve problems such as poor temperature resistance, thermal fatigue cracks on the surface of brake discs, low density and specific strength, etc.

Active Publication Date: 2022-02-25
HUNAN JINTIAN ALUMINUM HI TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Silicon carbide particle-reinforced aluminum matrix composites have low density, high specific strength and specific stiffness, high thermal conductivity, and excellent wear resistance and corrosion resistance. They have broad application prospects in the field of lightweight structural parts. Carbonization The replacement of traditional brake disc materials by silicon particle reinforced aluminum matrix composites has also become the main research direction of lightweight traffic vehicles. However, its application in traffic vehicle brake discs is not optimistic. This is mainly due to the following two factors: Problems caused: First, the plasticity and toughness of traditional silicon carbide particle-reinforced aluminum matrix composite materials are low, and thermal fatigue cracks are prone to occur on the surface of the brake disc; second, the temperature resistance of traditional silicon carbide particle-reinforced aluminum matrix composite materials is poor. When the temperature exceeds 400°C, the strength of the material will drop significantly

Method used

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  • Silicon carbide particle reinforced aluminum-based composite material as well as preparation method and application thereof
  • Silicon carbide particle reinforced aluminum-based composite material as well as preparation method and application thereof
  • Silicon carbide particle reinforced aluminum-based composite material as well as preparation method and application thereof

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preparation example Construction

[0021] A method for preparing a silicon carbide particle reinforced aluminum matrix composite material according to an embodiment includes the following steps S110-S150:

[0022] S110. Provide the following raw materials: silicon carbide (SiC) particles, Al-Si alloy powder, Cu-Ni powder and aluminum (Al) powder.

[0023] Wherein, the mass content of Si in the Al-Si alloy powder is 8% to 20%. Further, the Al-Si alloy powder also contains a small amount of other alloy elements, which are selected from at least one of Mg, Mn, and Ti, and the mass content of other alloy elements in the Al-Si alloy powder is less than or equal to 2%.

[0024] Further, the Al-Si alloy powder is an Al-Si eutectic powder with a mass content of Si of 12.1%.

[0025] The mass content of Ni in the Cu-Ni powder is 0-20%. It can be understood that when the mass content of Ni in the Cu-Ni powder is 0, it is copper (Cu) powder.

[0026] Further, the particle size of the SiC particles is 20 μm˜50 μm. The ...

Embodiment 1

[0050] The raw material compositions of Example 1 and Example 2 are shown in Table 1.

[0051] Table 1

[0052] Raw material ratio Example 1 Example 2 -500 mesh SiC particles (wt.%) 18.0 10.0 -320 mesh SiC particles (wt.%) —— 10.0 Al-Si eutectic powder (wt.%) 54.0 40.0 Cu-20Ni powder (wt.%) 5.0 5.0 Al powder (wt.%) 23.0 35.0

Embodiment 1 and Embodiment 2

[0053] The preparation method of embodiment 1 and embodiment 2 is as follows:

[0054] (1) The above-mentioned raw materials are turned over and mixed uniformly in a mixing tank to obtain a mixed material. The rotating speed of the mixing tank is 90 r / min, and the mixing time is 21 hours.

[0055] (2) Molding the above mixture to obtain a green compact, the unit pressing pressure of the molding is 400MPa, and the holding time is 7s.

[0056] (3) Sintering the above compact to obtain a sintered body. The sintering conditions are: in a nitrogen atmosphere, heating to 200°C at a heating rate of 10°C / min, holding for 60 minutes, and then raising the temperature to 490°C and then holding the temperature 60min, and finally heated to 570°C at 3°C / min, kept for 120min, and cooled with the furnace.

[0057] (4) The above-mentioned sintered body is placed in a mold for hot forging to obtain a silicon carbide particle reinforced aluminum matrix composite material. 10s.

[0058] The si...

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Abstract

The invention relates to a silicon carbide particle reinforced aluminum-based composite material as well as a preparation method and application thereof. The composite material takes SiC particles, Al-Si alloy powder, Cu-Ni powder and Al powder as raw materials, is obtained through material mixing, die forming, sintering and hot forging, not only has good wear resistance, but also has good high-temperature strength, is applied to a brake disc, can avoid material softening caused by high temperature in the braking process, is good in heat conductivity, and can effectively reduce temperature rise of a friction surface.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a silicon carbide particle reinforced aluminum matrix composite material and a preparation method thereof. Background technique [0002] Lightweight is one of the most effective means to achieve energy saving and consumption reduction of automobiles and other transportation vehicles. The use of high-performance light metal materials instead of steel materials in key moving parts such as engines and brake discs of transportation equipment can not only reduce the weight of the entire vehicle, reduce the momentum of high-speed moving parts of transportation equipment, but also significantly improve the dynamic performance of transportation equipment. At the same time reduce energy consumption. [0003] Silicon carbide particle reinforced aluminum matrix composites have low density, high specific strength and specific stiffness, high thermal conductivity, and excellent w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/05C22C1/10C22C32/00B22F3/02B22F3/10B22F3/17F16D65/12
CPCC22C21/02C22C1/05C22C32/0052B22F3/02B22F3/1007B22F3/17B22F3/1035F16D65/125F16D65/12F16D2200/003F16D2200/006F16D2200/0082Y02T10/86
Inventor 蒋兆汝李志友罗任曹柳絮刘春轩戴青松谢屹吴云刘石亮苏新
Owner HUNAN JINTIAN ALUMINUM HI TECH CO LTD