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Process of preparing composite material with in situ particle inhancing magnesium base

A composite material and particle reinforcement technology, applied in the field of materials, can solve problems such as not easy to control, and achieve the effect of uniform distribution, fine particles and good interface bonding.

Inactive Publication Date: 2007-02-07
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After literature search, it was found that Chinese Patent Publication No.: 1441076, patent name: process for preparing in-situ reinforced magnesium-based composite materials by mixed salt method, this patent proposes a process for preparing magnesium-based composite materials by mixed salt method, and the process selects a suitable Reinforcement phase reaction system, particle volume fraction, melt temperature, and stirring time prepare a magnesium-based composite material with fine reinforcement phase particles, uniform distribution, good interface bonding, and good mechanical and physical properties. However, due to the relatively large activity of magnesium , easy to react with many substances, so the preparation of magnesium-based composites by the mixed salt method has strict requirements on the reinforcing phase system and the melt reaction temperature, which is not easy to control in actual production, so the preparation of magnesium-based composites by the mixed salt method exists. certain restrictions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Using pure aluminum as the prefabricated matrix material, KBF 4 and K 2 TiF 6 As a mixed salt, it was dried at 150° C. for 1 hour. The temperature of the aluminum melt was selected to be 750°C, stirred with a steel paddle at a speed of 200r / min for 10 minutes, and after the stirring was completed, 5% magnesium was pressed in with a bell jar, and TiB with a mass percentage of 10% was first prepared. 2 In situ reinforced aluminum-magnesium matrix composite matrix. When the magnesium melt temperature was maintained at 720°C, the aluminum-magnesium matrix composite material prefabricated matrix was added, the steel slurry was stirred at 200r / min, and the stirring time was 10min. After the stirring was completed, the melt was left to stand at 700°C for 5min before pouring, and TiB 2 In situ reinforced magnesium aluminum matrix composites. The tensile strength of the material is 343-352MPa, and the elongation is 3.8-4.0%.

Embodiment 2

[0017] Using pure aluminum as the prefabricated matrix material, KBF 4 and K 2 TiF 6 As a mixed salt, it was dried at 200°C for 2 hours. The temperature of the aluminum melt was selected to be 800°C, and the steel paddle was stirred at a speed of 600r / min for 30 minutes. After the stirring was completed, 8% magnesium was pressed in with a bell jar, and TiB with a mass percentage of 15% was first prepared. 2 In situ reinforced aluminum-magnesium matrix composite matrix. When the magnesium melt temperature was maintained at 740°C, the aluminum-magnesium matrix composite material prefabricated matrix was added, the steel slurry was stirred at 600r / min, and the stirring time was 20min. After the stirring was completed, the melt was left to stand at 720°C for 10min before pouring, and TiB was prepared. 2 In situ reinforced magnesium aluminum matrix composites. The tensile strength of the material is 363-378MPa, and the elongation is 4.1-4.8%.

Embodiment 3

[0019] Using pure aluminum as the prefabricated matrix material, KBF 4 and K 2 ZrF 6 As a mixed salt, it was dried at 200°C for 2 hours. The temperature of the aluminum melt was selected to be 800°C, and the steel paddle was used to stir at a speed of 600r / min for 40 minutes. After the stirring was completed, 8% magnesium was pressed in with a bell jar, and ZrB with a mass percentage of 15% was first prepared. 2 In situ reinforced aluminum-magnesium matrix composite matrix. When the magnesium melt temperature was maintained at 740°C, the aluminum-magnesium matrix composite material prefabricated matrix was added, the steel slurry was stirred at 600r / min, and the stirring time was 20min. 2 In situ reinforced magnesium aluminum matrix composites. The tensile strength of the material is 333-342MPa, and the elongation is 3.9-4.3%.

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Abstract

The invention is a process of preparing particle in situ enhanced Mg-based composite, firstly selecting an enchancment phase according to the wetting property between the base and the eanchancement phase, using a mixed salt process to prepare an Al-Mg based composite mother body with particle weight percent of 10%-30%, then smelting the Mg base, then selecting melt temperature, adding the mother body in the Mg melt, stirring, and at last placing the melt still, pouring and cast-molding. It prepares a Mg-based composite having fine and uniformly- distributed particles, good binding interface and good mechanical and physical properties.

Description

technical field [0001] The invention relates to a process for preparing a particle-reinforced magnesium-based composite material, in particular to a process for preparing an in-situ reinforced magnesium-based composite material by using an aluminum-based composite material prefabricated matrix, and belongs to the field of materials. Background technique [0002] In recent years, due to concerns about the environment, energy and other issues, research on magnesium-based composites has become a hot spot in the field of materials. Magnesium-based composites are one of the lightest structural materials, and magnesium-based composites have high specific strength, specific stiffness, good castability and dimensional stability, good resistance to electromagnetic interference and shielding, and good damping properties. It has good vibration damping performance, little impact on the environment, no pollution, and its waste recycling rate is as high as 85%. It has broad application pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C32/00C22C23/00
Inventor 张修庆王浩伟马乃恒滕新营厉松春
Owner SHANGHAI JIAOTONG UNIV