Method for preparing in-situ particulate reinforced magnesium base composite

A technology of particle reinforcement and composite materials, which is applied in the field of metallurgy, can solve problems such as poor performance and complicated preparation technology, and achieve the effect of improving the strengthening effect, simple process, and good interface bonding

Inactive Publication Date: 2012-07-18
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of complex preparation technology and poor performance of existing magnesium-based composite materials, and provide a preparation method for in-situ particle-reinforced magnesium-based composite materials. The preparation method has simple process, low cost, and fine reinforcing particles And it is easy to disperse and distribute in the melt, so that the prepared composite material has good mechanical properties and wear resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Use the composition ratio shown in Table 1 to prepare composite materials

[0033] AI-Ti-CaC in composite materials 2 -C prefabricated block accounts for 10.5wt%. The proportion of the prefabricated block is: Al powder (particle size≤75μm) 50wt%, Ti powder (particle size≤75μm) 36wt%, CaC 2 Powder (particle size≤75μm) 8wt%, carbon powder (particle size≤75μm) 6wt%. Mix the powders evenly and press them into a prefabricated block with a diameter of 50mm and a height of 20mm. The prefabricated block is placed in a heating device protected by high-purity argon and heated to 1000°C at a heating rate of 20°C / min to initiate a self-propagating high-temperature synthesis reaction. The products are TiC reinforced particles, Al-Ca compounds and metallic aluminum. According to the composition ratio of the composite material, the base materials such as magnesium, aluminum and zinc are melted and heated to 750°C and kept for 15 minutes. The reaction prefabricated block preheat...

Embodiment 2

[0037] Use the composition ratio shown in Table 1 to prepare composite materials

[0038] AI-Ti-CaC in composite materials 2 -C prefabricated block accounts for 21.0wt%. The proportion of the prefabricated block is: Al powder (particle size≤75μm) 50wt%, Ti powder (particle size≤75μm) 38wt%, CaC 2 Powder (particle size≤75μm) 4wt%, carbon powder (particle size≤75μm) 8wt%. Mix the powders evenly and press them into a prefabricated block with a diameter of 50mm and a height of 20mm. The prefabricated block is placed in a heating device protected by high-purity argon and heated to 1000°C at a heating rate of 40°C / min to initiate a self-propagating high-temperature synthesis reaction. The products are TiC reinforced particles, Al-Ca compounds and metallic aluminum. According to the composite material design, the magnesium, zinc and other materials are melted and heated to 750°C and kept for 15 minutes. The reaction prefabricated block preheated to 400°C is added to the magnesi...

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PUM

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Abstract

The invention discloses a method for preparing an in-situ particulate reinforced magnesium base composite material, which comprises three steps of preparing a precast block, preparing reinforced particulates and preparing a composite material. In the method, a Al-Ti-CaC2-C reinforced system is adopted; a self-propagation high-temperature synthesis method is used for producing TiC reinforced particulates and a Al-Ca compound in-situ in the precast block in vacuum or under the protection of inert gases; the reacted precast block is put into a magnesium alloy melt to melt and spread; and sufficient stirring is finished and pouring is carried out to prepare into the particulate reinforced magnesium base composite. The method has the advantages of relatively simple technology and low cost; in the particulate reinforced magnesium base composite, reinforcing phase particulates are fine, are distributed evenly, can be preferably combined with a matrix interface; and the prepared particulate reinforced magnesium base composite material has the advantages of good mechanical property, wear-resisting property and the like.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a preparation method of an in-situ particle reinforced magnesium-based composite material. Background technique [0002] Magnesium alloy is currently the lightest metal structure material, with many excellent unique properties, such as high specific strength, high specific stiffness, good electrical and thermal conductivity, good damping and shock absorption and electromagnetic shielding performance, easy to process and shape, good With the advantages of regeneration and reuse, it has good application prospects in the fields of aviation, automobiles, and communication equipment. However, magnesium alloys have disadvantages such as small elastic modulus, low high temperature strength and creep resistance, especially poor wear resistance. These problems cannot be solved by conventional techniques (such as alloying, etc.), and their applications are greatly limited. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C32/00C22C23/00C22C1/02
Inventor 刘英李卫张兆东
Owner JINAN UNIVERSITY
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