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Strengthening and toughening heat treatment method of in-situ titanium boride particle reinforced aluminum matrix composite

An aluminum-based composite material and particle-reinforced aluminum technology are applied in the field of heat treatment of in-situ titanium boride particle-reinforced aluminum-based composite materials for strengthening and toughening, which can solve problems such as difficulty in solid solution, uneven precipitation, and the like, and achieve a simple process method. Easy to operate, promote diffusion, improve the effect of insufficient solid solution

Active Publication Date: 2018-10-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the defects in the prior art, the main problem to be solved by the present invention is to provide a simple and easy-to-operate high-temperature heat treatment for the important problems such as difficulty in solid solution and uneven precipitated phases in the heat treatment of in-situ nanoparticle-reinforced aluminum matrix composites. method to improve the comprehensive mechanical properties of the composite material

Method used

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  • Strengthening and toughening heat treatment method of in-situ titanium boride particle reinforced aluminum matrix composite
  • Strengthening and toughening heat treatment method of in-situ titanium boride particle reinforced aluminum matrix composite

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Embodiment 1

[0028] This embodiment relates to an in-situ TiB 2 A heat treatment method for strengthening and toughening the nanoparticle-reinforced aluminum-based composite material, comprising the following steps:

[0029] First to 3wt.%TiB 2 / 7050 aluminum matrix composite ingot (TiB 2 The particle size is 20-500nm) for homogenization treatment, the homogenization temperature is 470°C, the holding time is 24h, and then air-cooled.

[0030] After homogenization, high-temperature pretreatment is carried out, that is, at a solution temperature of 480 ° C, heat preservation for 2 hours, quickly remove the water quenching, and then add 3wt.% TiB 2 / 7050 aluminum-based composite material is hot-extruded at 420°C, and then rapidly water-quenched, and the transfer time is less than 15s.

[0031] 3wt.%TiB after hot extrusion 2 / 7050 aluminum matrix composite material, annealing treatment, the annealing temperature is 360 ℃, the time is 4h, and then rapid water quenching, the transfer time is...

Embodiment 2

[0036] This embodiment relates to an in-situ TiB 2 A heat treatment method for strengthening and toughening the nanoparticle-reinforced aluminum-based composite material, comprising the following steps:

[0037] First to 8wt.%TiB 2 / 2024 aluminum matrix composite ingot (TiB 2 The particle size is 20-500nm) for homogenization treatment, the homogenization temperature is 490°C, the holding time is 48h, and then air-cooled.

[0038] After homogenization, carry out high-temperature pretreatment at 505°C for 3 hours, quickly remove the water quenching, and then add 8wt.%TiB 2 / 2024 aluminum matrix composite material is hot extruded at 420°C, and then rapidly water quenched, and the transfer time is less than 15s.

[0039] 8wt.%TiB after hot extrusion 2 / 2024 aluminum matrix composite material, annealing treatment, the annealing temperature is 380 ℃, the holding time is 5h, and then rapid water quenching, the transfer time is less than 15s.

[0040] The annealed 8wt.%TiB 2 / 20...

Embodiment 3

[0045] This embodiment relates to an in-situ TiB 2 A heat treatment method for strengthening and toughening the nanoparticle-reinforced aluminum-based composite material, comprising the following steps:

[0046] First to 10wt.%TiB 2 / 6061 aluminum matrix composite ingot (TiB 2 The particle size is 20-500nm) for homogenization treatment, the homogenization temperature is 550°C, the time is 48h, and then air-cooled.

[0047] After homogenization, high temperature pretreatment was carried out at 565°C for 4 hours, water quenching was taken out quickly, and then 10wt.%TiB 2 / 6061 aluminum-based composite material is hot-extruded at 420°C, and then rapidly water-quenched, and the transfer time is less than 15s.

[0048] 10wt.%TiB after hot extrusion 2 / 6061 aluminum matrix composite material, annealing treatment, the annealing temperature is 380 ℃, the holding time is 8h, and then rapid water quenching, the transfer time is less than 15s.

[0049] The annealed 10wt.%TiB 2 / 60...

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Abstract

The invention provides a strengthening and toughening heat treatment method of an in-situ titanium boride particle reinforced aluminum matrix composite. The method comprises following steps that the aluminum matrix composite is subjected to homogenization treatment and then is subjected to high-temperature pretreatment, heat extrusion treatment, annealing treatment, short-time high-temperature solid-solution treatment, pre-deforming treatment and aging treatment in sequence; according to the heat treatment method, the process is simple and reasonable, through high-temperature homogenization and solid solution treatment, segregation can be effectively removed, and solid solution of the second phase can be promoted; through extrusion deforming and low-temperature annealing, a stable substructure and a small grain boundary can be generated in the microstructure, and strengthening and toughening of the composite are facilitated; finally, through short-time high-temperature solid-solution quenching, pre-stretching deforming and short-time manual aging, the precipitated phase can be more evenly dispersed in the matrix alloy; and through the process, the strength and plasticity of the in-situ TiB2 nano particle reinforced aluminum matrix composite can be effectively improved.

Description

technical field [0001] The present invention relates to in situ TiB 2 A method for heat-treating nanoparticle-reinforced aluminum-matrix composites, in particular, involving an in-situ TiB 2 A heat treatment method for the strengthening and toughening of particle-reinforced aluminum matrix composites can improve the in-situ TiB 2 Methods to enhance the strength and ductility of aluminum matrix composites. Background technique [0002] Aluminum alloy is an alloy material widely used in the aerospace field because of its medium strength, good plasticity, good corrosion resistance and excellent damage tolerance. However, with the development of aerospace and automotive fields, it is difficult for aluminum alloy materials to meet the requirements of high modulus, high strength and fatigue performance. Due to its high specific strength, high specific modulus, excellent wear resistance and fatigue properties, particle reinforced aluminum matrix composites have received more att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
CPCC22F1/002C22F1/04
Inventor 耿继伟刘根周聪夏存娟陈东王浩伟马乃恒
Owner SHANGHAI JIAO TONG UNIV
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