Automobile lightweight aluminum matrix composite and preparation method thereof

An aluminum-based composite material and composite material technology, applied in the field of automotive lightweight aluminum-based composite materials and its preparation, can solve the problems of matrix splitting, affecting the mechanical properties of composite materials, unfavorable promotion and practical application, etc.

Inactive Publication Date: 2019-04-16
BEIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Mg 2 Si particle-reinforced aluminum matrix composite is a potential lightweight composite material for automobiles, which is often prepared by gravity casting, but the Mg obtained by this method 2 The Si primary phase is a thick dendrite with sharp corners, which has a splitting effect on the matrix, so it seriously affects the mechanical properties of the composite material, which is very unfavorable for popularization and practical application.

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  • Automobile lightweight aluminum matrix composite and preparation method thereof
  • Automobile lightweight aluminum matrix composite and preparation method thereof

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preparation example Construction

[0033] The present invention also provides a method for preparing an automobile lightweight composite material, comprising:

[0034] (1) Place the graphite crucible in a resistance furnace and heat it to 190-210°C, preferably 200°C, put the Al-20Si master alloy into the crucible and continue to heat up to 760-780°C to completely melt the alloy, keep it warm for 5-10min and then cool down to 700-720°C, preferably 710°C, to obtain an Al-20Si alloy melt;

[0035] (2) After preheating the process pure Mg covered by aluminum foil, press it into the Al-20Si alloy melt obtained in step (1), preferably heat up to 780-800°C for heat preservation, and the heat preservation time is preferably 10min. After the Mg is completely melted, the slag is removed by refining to obtain a melt; the preheating temperature of the process pure Mg is preferably 280-300°C, and the preheating time is preferably 30-40min;

[0036] (3) be heated up to 730-750 ℃, the Cu-14P master alloy after preheating is ...

Embodiment 1

[0042] A lightweight aluminum-based composite material for automobiles, the composite material is made of the following raw materials:

[0043] 709g Al-20Si master alloy, 106g industrial pure Mg and 31g Cu-14wt.%P master alloy, wherein the primary phase in the composite material is Mg 2 Si, accounting for 20% by mass of the composite material;

[0044] The Al-20Si master alloy includes Si: 20%, Mn: 0.230%, Cr: 0.036%, Fe; 0.8%, Zn: 0.012%, Ni; 0.001%, and the balance is Al.

[0045] The industrially pure Mg includes Si: 0.005%, Mn: 0.001%, Cr: 0.002%, Fe; 0.001%, Zn: 0.006%, Ni; 0.001%, Cu: 0.001%, Al: 0.002%, and the balance is Mg .

[0046] The Cu-14P master alloy is a modifier, and the amount of P added is 0.5% of the total amount of the composite material.

[0047] The preparation method of the automobile lightweight composite material, its steps are as follows:

[0048] (1) Place the graphite crucible in a resistance furnace and heat it to 200°C, put the Al-20Si inter...

Embodiment 2

[0055] A lightweight aluminum-based composite material for automobiles, the composite material is made of the following raw materials:

[0056] 700g Al-20Si master alloy, 103g industrial pure Mg and 29g Cu-14wt.%P master alloy, wherein the primary phase in the composite material is Mg 2 Si, accounting for 20% by mass of the composite material;

[0057] The Al-20Si master alloy includes Si: 20%, Mn: 0.230%, Cr: 0.036%, Fe; 0.8%, Zn: 0.012%, Ni; 0.001%, and the balance is Al.

[0058] The industrially pure Mg includes Si: 0.005%, Mn: 0.001%, Cr: 0.002%, Fe; 0.001%, Zn: 0.006%, Ni; 0.001%, Cu: 0.001%, Al: 0.002%, and the balance is Mg .

[0059] The Cu-14P master alloy is a modifier, and the amount of P added is 0.5% of the total amount of the composite material.

[0060] The preparation method of the automobile lightweight composite material, its steps are as follows:

[0061] (1) Place the graphite crucible in a resistance furnace and heat it to 200°C, put the Al-20Si inter...

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Abstract

The invention provides an automobile lightweight aluminum matrix composite and a preparation method thereof, and belongs to the technical field of metal matrix composites. The composite is made from the following raw materials: by weight part, 700-710 parts of Al-20Si intermediate alloy, 103-106 parts of industrial pure Mg, and 29-31 parts of Cu-14P intermediate alloy, wherein, the primary phase in the composite is Mg2Si accounting for the mass percentage of the composite by 20%. The invention further provides the preparation method for the automobile lightweight aluminum matrix composite. Thecomposite is high in tissue morphology and excellent in mechanical properties, the density of the composite is much lower than that of a traditional automobile engine cylinder and a cylinder sleeve material, the weight reduction effect is obvious, and the automobile lightweight aluminum matrix composite can serve as the lightweight composite to apply to the components such as an automobile enginecylinder and a cylinder sleeve.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials, and in particular relates to a lightweight aluminum-based composite material for automobiles and a preparation method thereof. Background technique [0002] Automobile lightweight is an important way and effective measure for automobile energy saving and protection. Experiments have shown that if the mass of the car is reduced by half, the fuel consumption will also be reduced by nearly half. At present, due to the needs of environmental protection and energy saving, the lightweight of automobiles has become the trend of the development of automobiles in the world. In recent years, my country's automobile production and ownership have shown a momentum of continuous growth, resulting in increasingly severe problems of energy consumption, safety and environmental protection. In order to solve the above three major problems and promote the sustainable development of the aut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C21/04C22F1/043
CPCC22C1/026C22C1/03C22C21/04C22F1/043
Inventor 刘晓波杨淼周德坤赵宇光陈永炳
Owner BEIHUA UNIV
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