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A kind of preparation method of particle reinforced aluminum matrix composite material

A particle-reinforced aluminum and composite material technology, applied in the field of metal materials, can solve the problems of poor wettability, affect the mechanical properties of materials, easy to agglomerate, etc., and achieve the effects of improving wettability, improving comprehensive performance and uniform distribution

Active Publication Date: 2020-03-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although SiC (Al 2 o 3 Whiskers) particle reinforced aluminum matrix composites have good application value, but there are some problems in the traditional preparation process of this material, such as SiC (Al 2 o 3 whiskers) have poor wettability with aluminum melt, SiC (Al 2 o 3 Whiskers) particles are small, easy to agglomerate in the aluminum melt, which greatly affects the mechanical properties of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of SiC particle reinforced aluminum matrix composite material, specifically comprising the following steps:

[0024] (1) Raw material pretreatment: SiC powder is subjected to surface activation pretreatment, the SiC powder is wrapped with aluminum foil, and placed in a resistance furnace at 300°C for preheating for 4 hours; TiH 2 (Foaming agent) Dry in a resistance furnace at 200°C for 2 hours; K 2 TiF 6 Dry in a drying oven at 150°C for 2 hours; graphite powder is preheated in a crucible resistance furnace at 500°C for 1 hour to remove its moisture;

[0025] (2) Mixing of raw materials: SiC powder pretreated in step (1), TiH 2 Powder, K 2 TiF 6 , graphite powder and Ce 2 o 3 Prepare in proportion and mix evenly to obtain a mixed powder; SiC powder, TiH powder in this embodiment 2 Powder, K 2 TiF 6 , graphite powder, Ce 2 o 3 The mass ratio is 10:1:5:1:1;

[0026] (3) Melting: Put the aluminum alloy ingot into the crucible and heat it to...

Embodiment 2

[0032] A preparation method of SiC particle reinforced aluminum matrix composite material, specifically comprising the following steps:

[0033] (1) Raw material pretreatment: SiC powder is subjected to surface activation pretreatment, the SiC powder is wrapped with aluminum foil, and placed in a resistance furnace at 300°C for preheating for 2 hours; TiH 2 (Foaming agent) Dry in a resistance furnace at 200°C for 3 hours; K 2 TiF 6 Dry in a drying oven at 150°C for 1 hour; graphite powder is preheated in a crucible resistance furnace at 300°C for 2 hours to remove moisture;

[0034] (2) Mixing of raw materials: SiC powder pretreated in step (1), TiH 2 Powder, K 2 TiF 6 , graphite powder and Ce 2 o 3 Prepare in proportion and mix evenly to obtain a mixed powder; SiC powder, TiH powder in this embodiment 2 Powder, K 2 TiF 6 , graphite powder, Ce 2 o 3 The mass ratio is 5:1:10:1:1;

[0035] (3) Melting: Put the aluminum alloy ingot into the crucible and heat it to 780...

Embodiment 3

[0041] a kind of Al 2 o 3 A method for preparing a whisker-reinforced aluminum-based composite material, specifically comprising the steps of:

[0042] (1) Raw material pretreatment: Al 2 o 3 Whiskers are subjected to surface activation pretreatment, and the Al 2 o 3 The whiskers were wrapped with aluminum foil and placed in a resistance furnace at 300°C for 3 hours; TiH 2 (Foaming agent) Dry in a resistance furnace at 200°C for 4 hours; K 2 TiF 6 Dry in a drying oven at 150°C for 1.5 hours; graphite powder is preheated in a crucible resistance furnace at 600°C for 0.5 hours to remove its moisture;

[0043] (2) Mixing of raw materials: the pretreated Al in step (1) 2 o 3 Whiskers, TiH 2 Powder, K 2 TiF 6 , graphite powder and Ce 2 o 3 Prepare in proportion, and mix homogeneously, obtain mixed powder; Present embodiment Al 2 o 3 Whiskers, TiH 2 Powder, K 2 TiF 6 , graphite powder, Ce 2 o 3 The mass ratio is 15:1:8:1:1;

[0044] (3) Melting: Put the aluminum ...

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Abstract

The invention discloses a method for preparing a particle-reinforced aluminum-based composite material. First, SiC powder (or Al 2 o 3 whiskers), foaming agent, graphite powder, K 2 TiF 6 Pretreatment with rare earth oxides, proportioning and mixing uniformly according to the mass percentage, putting the aluminum alloy ingot into the crucible and heating until it is completely melted, removing the scum, blowing the mixed powder into the aluminum melt, and waiting for complete The reaction is subjected to degassing treatment, extrusion casting is used for molding, and finally T6 heat treatment is carried out to obtain a particle-reinforced aluminum matrix composite material. The present invention adopts foaming agent, releases a large amount of gas at high temperature, fully stirs melt; Graphite powder, K 2 TiF 6 Carbothermal reaction with rare earth oxides to increase the reaction temperature of the melt to generate TiAl 3 , TiC and Al 2 Ti 20 Ce refines the grains, making SiC (Al 2 o 3 Whiskers) particle-reinforced aluminum matrix composites are evenly distributed in the reinforcement phase, which greatly improves the comprehensive performance of the material.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a preparation method of particle-reinforced aluminum-based composite materials. Background technique [0002] SiC (Al 2 o 3 Whisker) particle reinforced aluminum matrix composites have the characteristics of high elastic modulus, good wear resistance, high temperature and high pressure resistance and good oxidation resistance, so they are widely used in aerospace, automobile manufacturing and electronic packaging and other fields. Although SiC (Al 2 o 3 Whiskers) particle reinforced aluminum matrix composites have good application value, but there are some problems in the traditional preparation process of this material, such as SiC (Al 2 o 3 whiskers) have poor wettability with aluminum melt, SiC (Al 2 o 3 Whiskers) particles are small and easy to agglomerate in the aluminum melt, which greatly affects the mechanical properties of the material. Contents of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C32/00C22C1/10C22C49/06C22C49/14C22C47/12C22F1/04C22C101/04
CPCC22C1/1005C22C1/1036C22C21/00C22C32/0063C22C47/12C22C49/06C22C49/14C22F1/04C22C1/1073
Inventor 朱定一张思彬王连登朱富斌
Owner FUZHOU UNIV
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