Particle reinforced aluminum matrix composite for automobile piston and preparation method of particle reinforced aluminum matrix composite

An aluminum-based composite material and particle-reinforced aluminum technology, which is applied in the field of particle-reinforced aluminum-based composite materials for automobile pistons and its preparation, can solve the problems of poor heat resistance and high-temperature strength, and improve high-temperature mechanical properties and high-temperature wear resistance effect of size

Inactive Publication Date: 2018-01-05
HUNAN GOLDHORSE ALUMINUM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material retains the low density and high thermal conductivity of aluminum alloy, and obviously improves its strength and wear resistance, but because the substrate is ZL101 aluminum alloy, it has poor heat resistance and high temperature strength.

Method used

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  • Particle reinforced aluminum matrix composite for automobile piston and preparation method of particle reinforced aluminum matrix composite
  • Particle reinforced aluminum matrix composite for automobile piston and preparation method of particle reinforced aluminum matrix composite
  • Particle reinforced aluminum matrix composite for automobile piston and preparation method of particle reinforced aluminum matrix composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The alloy is formulated according to the weight fraction of the aluminum alloy matrix powder of the present invention, and Fe and V in the matrix alloy are added in the form of Al-40Fe and Al-40Fe-10V master alloys. Firstly, A1-40Fe and A1-40Fe-10V master alloys are melted at about 1600°C in an intermediate frequency induction furnace, and then an appropriate amount of pure aluminum and pure silicon is added to melt Al-8.5Fe-1.3V-1.7Si mother alloys at 1020°C Alloy, then atomize the powder with nitrogen gas, its chemical composition is as Alloy 1 in Table 1; then mix evenly with 10% SiC particles and 2% graphite according to the volume fraction, after mixing, put it into 5mm thick 3003 aluminum alloy The tube is compacted and vacuum degassed to make an extruded ingot with a size of Ф152×450mm, and the relative density is about 78%.

[0042] The heating temperature is 470-480°C, the heating rate is 50°C / hour, and the holding time is 4 hours; the mold temperature is 420-4...

Embodiment 2

[0044] The alloy is formulated according to the weight fraction of the aluminum alloy matrix powder of the present invention, and Fe and V in the matrix alloy are added in the form of Al-40Fe and Al-40Fe-10V master alloys. Firstly, A1-40Fe and A1-40Fe-10V master alloys are melted at about 1600°C in an intermediate frequency induction furnace, and then an appropriate amount of pure aluminum and pure silicon is added to melt Al-8.5Fe-1.3V-1.7Si mother alloys at 1020°C alloy, and then atomize the powder with nitrogen gas, and its chemical composition is as alloy 1 in Table 1; then mix evenly with 15% SiC particles and 1% graphite according to the volume fraction, and then put it into 5mm thick 3003 aluminum alloy after mixing The tube is compacted and vacuum degassed to make an extruded ingot with a size of Ф175×550mm, and the relative density is about 72%.

[0045] The heating temperature is 490-500°C, the heating rate is 40°C / hour, and the holding time is 5 hours; the mold temp...

Embodiment 3

[0048] The alloy is formulated according to the weight fraction of the aluminum alloy matrix powder of the present invention, and Fe and V in the matrix alloy are added in the form of Al-40Fe and Al-40Fe-10V master alloys. Firstly, A1-40Fe and A1-40Fe-10V master alloys are melted at about 1600°C in an intermediate frequency induction furnace, and then an appropriate amount of pure aluminum and pure silicon is added to melt Al-8.5Fe-1.3V-1.7Si mother alloys at 1020°C alloy, and then atomize the powder with nitrogen gas, and its chemical composition is as alloy 1 in Table 1; then mix evenly with 20% SiC particles and 1% graphite according to the volume fraction, and then put it into 5mm thick 3003 aluminum alloy after mixing The tube is compacted and vacuum degassed to make an extruded ingot with a size of Ф175×550mm, and the relative density is about 71%.

[0049] The heating temperature is 490-500°C, the heating rate is 40°C / hour, and the holding time is 5 hours; the mold temp...

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Abstract

The invention relates to a particle reinforced aluminum matrix composite for an automobile piston and a preparation method of the particle reinforced aluminum matrix composite. The aluminum matrix composite is prepared from 8-10wt% of Fe, 0.8-1.5wt% of V, 1.4-2.2wt% of Si, the balance 75-91% by volume of aluminum alloy matrix powder of Al, preferentially, 78-89% by volume, 8-25% by volume of silicon carbide, preferentially, 10-20% by volume and 0.5-4% by volume of graphite powder, preferentially, 1-2% by volume. The preparation method of the particle reinforced aluminum matrix composite comprises the steps that aluminum alloy matrix powder, silicon carbide and graphite powder are mixed to be uniform and compacted, a mixture is made to be an extrusion ingot blank, the extrusion ingot blankis heated to 450-520 DEG C, kept at the temperature, extruded according to the extrusion ratio being 8 or more, forged again and optionally machined. The particle reinforced aluminum matrix compositehas the advantages that the process is simple, the content of silicon carbide and graphite is easy to control, a matrix and a reinforcement phase have no interface reaction, and indoor-temperature high-temperature mechanical properties are excellent. The particle reinforcement aluminum matrix composite can be widely applied to manufacturing automobile positions, brake materials and other high-temperature wear resistance parts.

Description

technical field [0001] The invention relates to a particle-reinforced aluminum-based composite material for automobile pistons and a preparation method thereof. Background technique [0002] Aluminum and aluminum alloys are very suitable as the matrix of metal matrix composites, because aluminum is rich in resources, easy to obtain, reasonable in price, low in density, light in weight, high in specific strength and specific modulus of elasticity, low in melting point, and good in plasticity. The process and equipment are not very complicated, and it is easy to compound with reinforcing materials and perform secondary processing. In addition, it has good electrical conductivity, thermal conductivity and corrosion resistance. These are the characteristics that composite materials should have to meet the requirements of use, and they are also important reasons for the rapid development of aluminum matrix composite materials. Aluminum matrix composites have excellent comprehen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C32/00C22C1/05C22C1/10
Inventor 刘海洋余先锋牛仕龙张辉
Owner HUNAN GOLDHORSE ALUMINUM IND
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