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A kind of tial intermetallic compound reinforced aluminum-silicon composite material and preparation method thereof

A technology of intermetallic compounds and composite materials, applied in the field of preparation of TiAl intermetallic compound reinforced aluminum-silicon composite materials, can solve the problems of poor strength and heat resistance, high thermal expansion coefficient, poor wear resistance, etc., and achieve strength and durability Improved heat resistance, improved grain boundary strength and creep resistance, and improved thermal stability

Active Publication Date: 2022-04-19
贵州贵材创新科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the metal matrix composites in the prior art have poor strength and heat resistance, poor wear resistance, high coefficient of thermal expansion, and high price.

Method used

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  • A kind of tial intermetallic compound reinforced aluminum-silicon composite material and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] A TiAl intermetallic compound reinforced aluminum-silicon composite material, using aluminum-copper alloy as the composite material matrix, with a total mass of 4kg, including the following components and their mass percentages: Si: 6.0%, Cu: 4%, Mn: 0.6%, Mn: 0.5%, Ni: 0.5%, and the balance is Al and unavoidable impurities. The preparation method of the heat-resistant aluminum-copper alloy comprises the following steps:

[0029] (1) Preform preparation: mix titanium powder and aluminum powder at a mass ratio of 1:1 to obtain mixed material a; mix mixed material a and a pore-forming agent at a volume ratio of 5:5, and the pore-forming agent is carbonic acid Ammonium bicarbonate, the shape of ammonium bicarbonate is spherical, the particle size of ammonium bicarbonate is 0.4-1 mm, and the mixed material b is obtained. The mixed material b is pressed into a solid body, and the hole-removing sintering operation is carried out. A TiAl preform with a porosity of 50% was obt...

Embodiment 2

[0034] Example 2: A TiAl-reinforced aluminum-silicon composite material, using aluminum-copper alloy as the composite material matrix, with a total mass of 4kg, including the following components and their mass percentages: Si: 6.0%, Cu: 4%, Mn: 0.6% , Mn: 0.5%, Ni: 0.5%, and the balance is Al and unavoidable impurities. The preparation method of the heat-resistant aluminum-copper alloy comprises the following steps:

[0035] (1) Preform preparation: mix titanium powder and aluminum powder at a mass ratio of 1:1 to obtain mixed material a; mix mixed material a and a pore-forming agent at a volume ratio of 4:6, and the pore-forming agent is carbonic acid Ammonium bicarbonate, the shape of ammonium bicarbonate is spherical, the particle size of ammonium bicarbonate is 0.4-1 mm, and the mixed material b is obtained. The mixed material b is pressed into a solid body, and the hole-removing sintering operation is carried out. A TiAl preform with a porosity of 50% was obtained.

[...

Embodiment 3

[0040] Example 3: A TiAl-reinforced aluminum-silicon composite material, using aluminum-copper alloy as the composite material matrix, with a total mass of 4kg, including the following components and their mass percentages: Si: 6.0%, Cu: 4%, Mn: 0.6% , Mn: 0.5%, Ni: 0.5%, and the balance is Al and unavoidable impurities. The preparation method of the heat-resistant aluminum-copper alloy comprises the following steps:

[0041] (1) Preform preparation: mix titanium powder and aluminum powder at a mass ratio of 1:1 to obtain mixed material a; mix mixed material a and a pore-forming agent at a volume ratio of 3:7, and the pore-forming agent is carbonic acid Ammonium bicarbonate, the shape of ammonium bicarbonate is spherical, the particle size of ammonium bicarbonate is 0.4-1 mm, and the mixed material b is obtained. The mixed material b is pressed into a solid body, and the hole-removing sintering operation is carried out. A TiAl preform with a porosity of 50% was obtained.

[00...

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Abstract

The invention discloses a TiAl intermetallic compound-reinforced aluminum-silicon composite material, which comprises the following raw materials in terms of mass ratio; the mass ratio of titanium powder and aluminum powder is 1:1; the preparation method is as follows: weighing titanium powder and aluminum powder , to obtain the mixed material a, mix the mixed material a with the pore-forming agent, add a binder, and mix uniformly to obtain the mixed material b, put the mixed material b into a mold and compact it into a green body, demoulding, to obtain a green body, and the green body The blank is put into a vacuum drying oven to remove the pores and dry, and the porous green block is sintered under vacuum conditions, and the multi-scale structure TiAl porous material is obtained; the alloy material is weighed according to the proportion of the alloy composition, and put into the furnace In the process, after all the furnace materials are melted, the slag is removed and refined to obtain a refined metal melt; the sintered TiAl porous material is put into a casting mold for pressure infiltration, and the poured material is subjected to solid solution + aging treatment. The invention has good strength and heat resistance, good wear resistance, low thermal expansion coefficient and low price.

Description

[0001] The invention belongs to the technical field of composite materials, and in particular relates to a TiAl intermetallic compound reinforced aluminum-silicon composite material, and also relates to a preparation method. Background technique [0002] Due to its light weight, excellent mechanical properties and tribological properties, aluminum matrix composites have become one of the most demanding engineering materials in metal matrix composites, and have been widely used in automotive and aerospace industries. However, the metal matrix composite material in the prior art has poor strength and heat resistance, poor wear resistance, high coefficient of thermal expansion, and high price. Contents of the invention [0003] The purpose of the present invention is to provide a TiAl intermetallic compound reinforced aluminum-silicon composite material with good strength and heat resistance, good wear resistance, low thermal expansion coefficient and low price and its preparati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02B22F1/105B22F3/02B22F3/11B22D23/04C22F1/043C21D1/18C22C1/08C22C1/03
CPCC22C21/02B22F3/02B22F3/1121B22D23/04C22F1/002C22F1/043C22C1/026C22C1/03
Inventor 李衍蓓李衍雷
Owner 贵州贵材创新科技股份有限公司