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Prepn process of particle-reinforced Mg-base composite mateiral

A composite material and particle reinforcement technology, applied in the field of materials, can solve the problems affecting the mechanical properties of composite materials, lack of magnesium-based composite materials, etc., and achieve the effect of good interface bonding, fine particles, and good mechanics.

Inactive Publication Date: 2003-09-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cheng Xiulan and others wrote an article "Research on Remelting and Dilution of In-situ Aluminum Matrix Composite Materials" in "Weapon Materials Science and Engineering" 1999, 22(3): 18-22. Material research, in their research, long strips of Al appeared in composite materials 3 Ti, which affects the mechanical properties of the composite
Furthermore, the remelting dilution method has been studied in the preparation of aluminum matrix composites, but there are no reports and literatures on the preparation of magnesium matrix composites.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1 adopts pure magnesium as the matrix material, divides into prefabricated body raw material with aluminum powder, titanium powder, boride carbon, with ball milling speed 150r / min, ball material ratio 5: 1 mixes material for 30 minutes, then takes powder, uses 5MPa The pressure is pressed, and the pressure is maintained for 30s. The pressed preform is sintered in a vacuum furnace, and the temperature is raised to 500°C for 10 minutes, then the temperature is raised to 800°C for 10 minutes, and the sintered preform is taken out of the furnace. The preform is pretreated at 150°C for 60 minutes, and then the preform is put into the magnesium melt at 740°C, kept warm for 10 minutes and then stirred. The steel paddle is stirred at 200r / min, and the stirring time is 10 minutes. After stirring for 10 minutes, stand still for 5 minutes to pour. Preparation mass percentage is 5% (TiB 2 +TiC) hybrid reinforced ZM5 matrix composites. The material has a tensile strength...

Embodiment 2

[0015] Embodiment 2 adopts pure magnesium as the base material, and is divided into prefabricated body raw material with aluminum powder, titanium powder, carbon powder, with ball milling speed 300r / min, ball material ratio 20: 1 mixing 5 hours, then take powder, use 15Mpa The pressure is pressed, and the pressure is maintained for 300s. The pressed preform is placed in a vacuum furnace for sintering, and the temperature is raised to 600°C for 35 minutes, then the temperature is raised to 1100°C for sintering for 40 minutes, and the sintered preform is removed from the furnace. The preform was pretreated at 200°C for 120 minutes, then put the preform into the magnesium melt at 760°C, kept warm for 40 minutes and then stirred, the steel paddle was stirred at 600r / min, the stirring time was 20 minutes, after stirring for 20 minutes, it was left to stand for 10 minutes to pour. The ZM5-based magnesium-based composite material with 5% TiC mixed reinforcement was prepared. The mate...

Embodiment 3

[0016] Embodiment 3 adopts pure magnesium as matrix material, is divided into prefabricated body raw material with aluminum powder, titanium powder, boride carbon, with ball mill rotating speed 500r / min, ball-to-material ratio 50: 1 mixes material 10 hours, then takes powder, uses Press at a pressure of 30Mpa, hold the pressure for 600s, sinter the pressed preform in a vacuum furnace, raise the temperature to 650°C for 60 minutes, then raise the temperature to 1500°C for 60min, and take out the sintered preform after cooling in the furnace. The preform was pretreated at 250°C for 180 minutes, then put the preform into the magnesium melt at 800°C, kept warm for 60 minutes and then stirred, the steel paddle was stirred at 1000r / min, the stirring time was 30 minutes, after stirring for 30 minutes, it was left to stand for 20 minutes for pouring. Preparation mass percentage is 5% (TiB 2 +TiC) hybrid reinforced ZM5 matrix composites. The material has a tensile strength of 324MPa a...

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Abstract

The preparation process of Mg-base composite material includes the following steps: determining the alloy element components and reinforcing phase of the composite material, controlling the reinforcing phase content in 2-15 wt%, mixing and ball milling; pressing the mixed powder into prefabricated block and sintering under inert gas protection to synthesize the reinforcing phase for the Mg-base composite material; smelting magnesium substrate material; stoving and melting the prefabricated block and adding it into magnesium melt at proper temperature while stirring and maintaining the temperature; and casting the melt after being let stand to form. The reinforcing phase is fine, homogeneously distributed and excellent in interface binding, and the Mg-base composite material has excellent material and physical performance and may be used widely.

Description

technical field [0001] The invention relates to a process for preparing particle-reinforced magnesium-based composite materials, in particular to a process for preparing in-situ reinforced magnesium-based composite materials by a remelting dilution method, which 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 prospects in aerospace, automobile, com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/00C22C23/00C22C32/00
Inventor 王浩伟张修庆马乃恒滕新营李险峰
Owner SHANGHAI JIAO TONG UNIV
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