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Nano ceramic particle reinforced aluminum silicon alloy, preparation method and application thereof

A technology of nano-ceramic particles and aluminum-silicon alloy, which is applied in the field of aluminum alloy materials, can solve the problems of large thermal load and mechanical load, cylinder scrapping, easy to generate pores, etc.

Inactive Publication Date: 2016-08-24
ALUMICS MATERIALS INSTIUTUTE ANHUI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal conductivity and corrosion resistance of cast iron materials are poor, while the cylinder block is in contact with high-temperature and high-pressure gas for a long time, and needs to bear a large thermal load and mechanical load
Under long-term working conditions, the cast iron cylinder is prone to defects such as air holes, deformation and leakage, which may easily lead to the scrapping of the cylinder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An aluminum-silicon alloy reinforced with nano-ceramic particles for an engine block, consisting of the following components in mass percentage: Si 13%, Mg 0.5%, Cu 0.4%, Fe 0.2%, Mn 0.1%, Zn 0.05%, TiB 2 20% particles, the balance is Al. Among them, TiB 2 The particles are nanoparticles with a diameter of 15nm and a hexagonal shape. TiB 2 The particles are uniformly distributed in the aluminum alloy, the interface is clean and there is no interface reaction.

[0024] A method for preparing an aluminum alloy reinforced with nano-ceramic particles for a cylinder body adopts the following steps:

[0025] (1) Melting the aluminum ingot and raising the temperature to 860°C;

[0026] (2) KBF 4 、K 2 TiF 6 Mix evenly according to the mass ratio of 1:1.3, add to the melt after drying, perform mechanical stirring, and introduce Ar into the melt at the same time;

[0027] (3) Take out the reaction slag, add Si, Mg and Zn and Al-50% Cu, Al-20% Fe and Al-10% Mn master alloy...

Embodiment 2

[0030] An aluminum-silicon alloy reinforced with nano-ceramic particles for an engine block, consisting of the following components in mass percentage: Si 3%, Mg 0.2%, Cu 0.2%, Fe 0.1%, Mn 0.1%, Zn 0.1%, TiB 2 5% particles, the balance is Al. Among them, TiB 2 The particles are nanoparticles with a particle diameter of 320nm and a rectangular shape. TiB 2 The particles are uniformly distributed in the aluminum alloy, the interface is clean and there is no interface reaction.

[0031] A method for preparing an aluminum alloy reinforced with nano-ceramic particles for a cylinder body adopts the following steps:

[0032] (1) Melt the aluminum ingot and raise the temperature to 1030°C;

[0033] (2) KBF 4 、K 2 TiF 6 Mix evenly according to the mass ratio of 1:1.9, add to the melt after drying, perform mechanical stirring, and introduce Ar into the melt at the same time;

[0034] (3) Take out the reaction slag, add Si, Mg and Zn and Al-50% Cu, Al-20% Fe and Al-10% Mn master ...

Embodiment 3

[0037] An aluminum-silicon alloy reinforced with nano-ceramic particles for an engine block, consisting of the following components in mass percent: Si 8%, Mg 0.6%, Cu 0.05%, Fe 0.3%, Mn 0.3%, Zn 0.08%, TiB 2 Particles 0.1%, the balance is Al. Among them, TiB 2 The particles are nanoparticles with a particle diameter of 15-30nm and a hexagonal shape. TiB 2 The particles are uniformly distributed in the aluminum alloy, the interface is clean and there is no interface reaction.

[0038] A method for preparing an aluminum alloy reinforced with nano-ceramic particles for a cylinder body adopts the following steps:

[0039] (1) Melting the aluminum ingot and raising the temperature to 900°C;

[0040] (2) KBF 4 、K 2 TiF 6 Mix evenly according to the mass ratio of 1:1.6, add to the melt after drying, perform mechanical stirring, and introduce Ar into the melt at the same time;

[0041](3) Take out the reaction slag, add Si, Mg and Zn and Al-50% Cu, Al-20% Fe and Al-10% Mn mas...

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Abstract

The invention relates to a nano ceramic particle reinforced aluminum silicon alloy, a preparation method and application thereof. The nano ceramic particle reinforced aluminum silicon alloy comprises the following components by mass percent content: 3 to 13% of Si, 0.2 to 0.6% of Mg, 0.05 to 0.4% of Cu, 0.1 to 0.3% of Fe, 0.1 to 0.3% of Mn, 0.05 to 0.1% of Zn, 0.1 to 25% of TiB2 particles, and the balance being Al. The nano ceramic particle reinforced aluminum silicon alloy is used for manufacturing engine cylinders. Compared with the prior art, the obtained nano ceramic particle reinforced aluminum silicon alloy has the advantages that the tensile strength is 280 to 400 MPa, the Brinell hardness is 120 to 140, the elongation is 2 to 3%, the performance indexes are superior to mechanical performance indexes of an aluminum silicon alloy for a conventional engine cylinder, the requirement of a high-performance engine on a severer working condition can be met, and the nano ceramic particle reinforced aluminum silicon alloy can be utilized as a high-performance engine cylinder material.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy materials, and in particular relates to an aluminum-silicon alloy reinforced with nano-ceramic particles for an engine cylinder block and a preparation method thereof. Background technique [0002] The cylinder blocks of early automobile engines were mostly made of cast iron. However, the thermal conductivity and corrosion resistance of cast iron materials are poor, while the cylinder block is in contact with high-temperature and high-pressure gas for a long time, and needs to bear a large thermal load and mechanical load. Under long-term working conditions, the cast iron cylinder block is prone to defects such as air holes, deformation and leakage, which may easily lead to the scrapping of the cylinder block. Therefore, the current automobile engine block materials are mostly cast from aluminum-silicon alloys. Aluminum-silicon alloy is a casting alloy mainly composed of aluminum and sili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C32/00C22C1/10C22C1/03C22C1/06C22F1/043
CPCC22C21/02C22C1/06C22C1/1036C22C32/0073C22F1/043
Inventor 汪明亮陈哲陈东夏存娟王浩伟王鹏举
Owner ALUMICS MATERIALS INSTIUTUTE ANHUI CO LTD