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Preparation method of particle-reinforced aluminum-base composite material

A technology of particle-reinforced aluminum and composite materials, which is applied in the field of preparation of particle-reinforced aluminum-based composite materials to achieve the effects of accurate ratio control, no interface reaction, and stable quality

Inactive Publication Date: 2012-07-04
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation methods mainly include powder metallurgy, spray deposition, and stirring casting. Each method has its advantages and disadvantages, so these methods have certain limitations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Preparation of Al-29%wtSiC p composite material

[0014] a. First, mix the reinforcing particles and aluminum powder evenly at a ratio of 10:1, and the total weight of the mixed powder is 1 kg;

[0015] b. Put the uniformly mixed powder into the graphite mold of the hot-pressing sintering furnace. The hot-pressing pressure is 30MPa, and the heating rate is 20°C / min.

[0016] c. Melt 3 kg of aluminum ingots in an electric furnace. After it is melted, put the billet obtained by hot pressing and sintering into it. After the billet is completely melted into the molten aluminum, use 25% Na 2 SiF 6 +75%C 2 Cl 6 Refining agent and used in conjunction with a rotary degasser, where 25% Na 2 SiF 6 +75%C 2 Cl 6 0.6% of the weight of the aluminum ingot is added, and the melt is refined for 20 minutes; at 720 ° C, 4% of the weight of the aluminum ingot is added as a refiner Al-5Ti-1B master alloy, kept for 10 minutes, and then allowed to stand for 15 minutes. P...

Embodiment 2

[0018] Example 2 : Preparation of ZAL102-24%wtSiC p composite material

[0019] a. First, mix the reinforcing particles and aluminum powder evenly at a ratio of 8:1, and the total weight of the mixed powder is 1 kg;

[0020] b. Put the uniformly mixed powder into the graphite mold of the hot-pressing sintering furnace, the hot-pressing pressure is 30MPa, and the heating rate is 20°C / min. When the temperature rises to 500°C, keep the temperature for 30 minutes and then cool down with the furnace;

[0021] c. Melt 3 kg of aluminum alloy in an electric furnace. After it is melted, put the billet obtained by hot pressing and sintering into it. After the billet is completely melted into the molten aluminum, use 25% Na 2 SiF 6 +75%C 2 Cl 6 Refining agent and used in conjunction with a rotary degasser, where 25% Na 2 SiF 6 +75%C 2 Cl 6 The amount of the added amount is 0.6% of the weight of the aluminum ingot, and the melt is scoured for 15 minutes; at 720°C, add a refinin...

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Abstract

The invention relates to a preparation method of a particle-reinforced aluminum-base composite material, which comprises the following steps: a. mixing reinforcing particle powder and aluminum alloy powder according to a ratio of (7-11):1; b. filling the evenly mixed powder into a hot pressing sintering furnace, carrying out hot pressing sintering at a heating rate of 10-20 DEG C / min under a hot pressing pressure of 20-30 Mpa, keeping the temperature and pressure for 20-40 minutes when the temperature ascends to 400-500 DEG C, and carrying out furnace cooling; and c. taking aluminum or aluminum alloy which is three times of the sum of weight of reinforcing particle powder and aluminum alloy powder, smelting, adding the blank obtained in the step b after the mixture is molten, and treatingfor 10-20 minutes by using a 25% Na2SiF6+75% C2Cl6 refining agent matched with a rotary degasifier after the blank is completely molten in the aluminum liquid; adding a refiner Al-5Ti-1B interalloy which accounts for 4 wt% of the aluminum or aluminum alloy at 720 DEG C, keeping the temperature for 5-10 minutes; and standing for 15 minutes, and pouring into an ingot mold.

Description

technical field [0001] The invention relates to the preparation of a metal-based composite material, in particular to a method for preparing a particle-reinforced aluminum-based composite material. Background technique [0002] Due to the advantages of high specific strength, high specific stiffness, good dimensional stability (small linear expansion coefficient), strong designability, fatigue resistance, corrosion resistance, and easy large-area overall forming, aluminum-based composite materials are widely used in aviation, aerospace, automotive, etc. , instrumentation, transportation, machinery, electronic information and 3C industries (Computer, Communication, Consumer Electronic) and other fields are increasingly widely used. Among them, particle-reinforced aluminum matrix composites have become a new material with the most potential application value in aluminum matrix composites because of their low manufacturing cost, sufficient raw material sources, good comprehensi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/10
Inventor 米国发历长云王狂飞王海燕王有超郑喜平陈立林
Owner HENAN POLYTECHNIC UNIV
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