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Preparation method of particle-reinforced magnesium-based composite material

A technology of particle reinforcement and composite materials, which is applied in the field of preparation of magnesium-based composite materials, can solve the problems of uneven particle dispersion, long preparation time, and low strength, and achieve the effects of simple process, reduced preparation time, and improved yield strength

Active Publication Date: 2014-05-14
严格集团股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of low strength, poor plasticity, uneven dispersion of particles in the magnesium alloy and long preparation time in the particle-reinforced magnesium-based composite material prepared by the existing method, and to provide a particle-reinforced magnesium-based composite material. Preparation

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  • Preparation method of particle-reinforced magnesium-based composite material
  • Preparation method of particle-reinforced magnesium-based composite material
  • Preparation method of particle-reinforced magnesium-based composite material

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specific Embodiment approach 1

[0028] Embodiment 1: This embodiment is a method for preparing a particle-reinforced magnesium-based composite material. When the particle size is micron, the method for preparing a particle-reinforced magnesium-based composite material is specifically completed in the following steps:

[0029] 1. Preparation of magnesium alloy semi-solid melt: In the atmosphere of protective gas, the temperature of magnesium alloy is raised from room temperature to 720 ° C ~ 750 ° C, and then the temperature is lowered to 580 ° C ~ 630 ° C, and the scum on the surface of magnesium alloy is removed to obtain magnesium alloy. Alloy semi-solid melt;

[0030] The magnesium alloy described in step 1 is composed of magnesium and other metal elements; the other metal elements are one or more of zinc, manganese, aluminum and calcium; the magnesium alloy The mass percentage of magnesium element in the medium is 80% to 99%;

[0031] 2. Preparation of particles-magnesium alloy melt: ①Heat the particles...

specific Embodiment approach 2

[0038] Embodiment 2: This embodiment differs from Embodiment 1 in that the protective gas described in step 1 is a mixed gas of one or two of carbon dioxide and sulfur hexafluoride. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0039] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the particle size in step 2 ① is 1 μm-10 μm. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of a particle-reinforced magnesium-based composite material and aims at solving the problem that the particle-reinforced magnesium-based composite material prepared by an existing method is low in strength and poor in plasticity, particles are unevenly dispersed in magnesium alloy and the preparation time is long. The preparation method comprises the following steps of 1 preparing a magnesium alloy semi-solid melt; 2 preparing a particle-magnesium alloy melt; 3 enabling the particle-magnesium alloy melt to be solidified and formed. The preparation method has the advantages that the tensile strength and yield strength of the obtained particle-reinforced magnesium-based composite material are improved by 50%-150%, the highest elongation rate reaches to 8%; the particles are evenly dispersed in the magnesium alloy, the pore defect in the magnesium-based composite material is overcome; the process is simple, the preparation time is shortened by 15%-30%. The particle-reinforced magnesium-based composite material can be obtained by using the preparation method.

Description

technical field [0001] The invention relates to a preparation method of a magnesium-based composite material. Background technique [0002] Magnesium is one of the lightest metallic structural materials, with a density 35% lighter than aluminum and 65% lighter than titanium. With the increasing demand for energy conservation and emission reduction in the automotive and aerospace industries, and considering the requirements of material properties, magnesium and its alloys have been extensively studied in current scientific research and commercial applications. However, the strength of traditional magnesium alloys is often not high, and the elongation at room temperature is also low due to the close-packed cubic structure of magnesium, which limits its application range. In order to improve the mechanical properties of magnesium alloys, magnesium-based composites have attracted the attention of many researchers due to their advantages such as low density, high strength, stiff...

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Application Information

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IPC IPC(8): C22C23/00C22C1/03
Inventor 王晓军聂凯波胡小石吴昆郑明毅
Owner 严格集团股份有限公司
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