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Magnesium-based composite material billet and preparation method thereof, and magnesium-based composite material and preparation method thereof

A composite material and billet technology, applied in the field of composite material preparation, can solve problems such as improving the mechanical properties of magnesium alloys, environmental pollution, energy waste, etc., and achieve low cost, low cost, and avoid oxidation or burning.

Inactive Publication Date: 2018-08-17
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two problems with the currently prepared magnesium-based composites: first, only considering the improvement of the mechanical properties of magnesium alloys, ceramic particles are selected as the reinforcing phase
These methods have certain problems, that is, a large amount of magnesium burning will be caused during the melting of magnesium ingots, and covering agents or protective gases need to be added, which will cause environmental pollution and energy waste

Method used

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  • Magnesium-based composite material billet and preparation method thereof, and magnesium-based composite material and preparation method thereof
  • Magnesium-based composite material billet and preparation method thereof, and magnesium-based composite material and preparation method thereof

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preparation example Construction

[0034] According to a first aspect of the present invention, a method for preparing a magnesium-based composite material blank is provided, comprising: adding a sheet-structured MoS 2 with Al 2 o 3 Particle mixing to obtain uniform coating of MoS 2 Al 2 o 3 Granules are then ball milled and mixed with AZ31 magnesium chips to obtain a mixture, and the mixture is pressed into billets.

[0035] Preferably, the MoS of the lamellar structure 2 The mass of the Al 2 o 3 The mass ratio of the particles is 1:3-5; as in the embodiment of the present invention, the MoS with lamellar structure 2 The mass of Al 2 o 3 The mass ratio of particles can be set as 1:3, 1:4, 1:5.

[0036] Preferably, Al 2 o 3The particle size of the particles is 0.1-0.5 μm;

[0037] Preferably, AZ31 magnesium chips and coated MoS 2 Al 2 o 3 The ratio of particle mass is 95-99:1-5. For example, in the embodiment of the present invention, AZ31 magnesium chips and coated MoS 2 Al 2 o 3 The ratio ...

Embodiment 1

[0053] 0.25 kg of MoS with a lamellar structure 2 with 0.75kg of Al 2 o 3 After the particles were mixed according to the mass ratio of 1:3, they were put into anhydrous ethanol solvent for ultrasonic stirring. The ultrasonic frequency is 20 kHz, and the ultrasonic treatment is 20 min. Put the obtained mixed slurry into a drying oven at a temperature of 110°C and dry for 60 minutes to obtain a coated MoS 2 Al 2 o 3 particles. 99kg of AZ31 magnesium chips and 1kg of coated MoS 2 Al 2 o 3 The particles are mixed and ball milled, the ball milling time is 1h, the temperature is 10°C, and the rotation speed is set at 200r / min. Then put the obtained mixture into a mold, pressurize to 350MPa at 0°C, and hold the pressure for 20s to obtain a billet. The obtained billet was subjected to solid solution treatment for 2 hours at a solution temperature of 450° C., and then subjected to aging treatment at a temperature of 200° C. for 2 hours. Among them, ball milling and solid so...

Embodiment 2

[0056] 0.25 kg of MoS with a lamellar structure 2 with 1.0kg of Al 2 o 3 After the particles are mixed according to the mass ratio of 1:4, they are put into an anhydrous ethanol solvent for ultrasonic stirring. The ultrasonic frequency is 40kHz, and the ultrasonic treatment is 30min. Put the obtained mixed slurry into a drying oven at a temperature of 120°C and dry for 90 minutes to obtain a MoS-coated 2 Al 2 o 3 particles. 61.25kg of AZ31 magnesium chips and 1.25kg of coated MoS 2 Al 2 o 3 The particles were mixed and ball milled, the ball milling time was 2h, the temperature was 10°C, and the rotational speed was set at 600r / min. Then put the obtained mixture into a mold, pressurize to 450MPa at 10°C, and hold the pressure for 40s to obtain a billet. The obtained blank was subjected to solid solution treatment for 3 hours at a solution temperature of 475°C, and then subjected to aging treatment at a temperature of 215°C for 3.5 hours. Among them, ball milling and ...

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Abstract

The invention provides a magnesium-based composite material billet and a preparation method thereof, and a magnesium-based composite material and a preparation method thereof, and belongs to the technical field of composite material preparation. The preparation method of the magnesium-based composite material billet comprises the steps that a mixing material of MoS2 of a laminated structure and Al2O3 particles is subjected to ultrasonic treatment in a solvent to obtain a first mixture with the Al2O3 particles wrapped with the MoS2, after the first mixture is dried, the first mixture and AZ31 magnesium chips are subjected to ball milling to obtain a second mixture, the second mixture is pressed into the billet, and the billet is subjected to solid solution and aging treatment and finally issubjected to hot-extrusion forming to obtain the composite material. According to the Al2O3 particles wrapped with the MoS2, grains of the material is refined, so that the strength and hardness of the material are improved, meanwhile, the MoS2 has a lubricating effect, thus abrasion resistance of the material is improved, and the preparation method is low in cost, simple in process and good in finished product quality, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a magnesium-based composite material blank and a preparation method thereof, a magnesium-based composite material and a preparation method thereof. Background technique [0002] Magnesium and its alloys have excellent machinability, high specific stiffness and specific strength, low density (about one-third of steel), good electromagnetic shielding performance, etc., and are widely used in aerospace, automobiles, Digital electronic products and other fields. With the development of the automobile industry, more and more attention has been paid to reducing emissions and protecting the environment through lightweight vehicles. Driven by this, magnesium alloys have become one of the most potential structural engineering materials. [0003] Since magnesium alloy has a close-packed hexagonal crystal structure, there are few independent slip systems at room temp...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/05C22C23/00C22C32/00B22F3/02B22F3/20
CPCC22C1/0408B22F3/02B22F3/20B22F2003/208C22C1/05C22C23/00C22C32/0005
Inventor 吉泽升王殿君胡茂良魏帅虎
Owner HARBIN UNIV OF SCI & TECH