Preparation method of metal titanium particle reinforced magnesium-based composite material

A particle-reinforced, composite material technology, applied in the field of magnesium-based composite materials, can solve the problems of combustion, uneven dispersion of titanium particles, easy oxidation, etc., to achieve high strength and plasticity, improve mechanical properties, and improve the effect of plasticity

Active Publication Date: 2022-05-06
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Titanium particles are chemically active, not only easy to oxidize at high temperature, but also may burn
Not only is it easy to cause safety hazards, but also the content of titanium particles is lower than the design requirements
The density of titanium is higher than that of magnesium, which makes it easy for titanium particles to settle in the magnesium melt, causing uneven dispersion of titanium particles

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A method for preparing a titanium particle reinforced magnesium-based composite material, the specific preparation method comprising the following steps:

[0031] (1) Preparation of titanium particle preform: Weigh 1g of titanium particles with an average particle size of 80nm and 4g of magnesium chips with an average particle size of 75μm, put them into a stainless steel ball mill jar, add 25g of stainless steel balls, repeatedly evacuate and then flush with argon for 3 After the second time, under the protection of argon, the ball milled for 90 minutes, the ball milling speed was 80rmp, and the mixed powder of titanium particles and magnesium chips was obtained by sieving after ball milling. body;

[0032] (2) Stirring casting molding: SF at a volume ratio of 1:99 6 and CO 2 Under gas protection, put 995g of AZ31B magnesium alloy ingot into the crucible to melt, then add 5g of titanium particle prefabricated body obtained in step (1) into the magnesium melt and keep...

Embodiment 2

[0035] A method for preparing a titanium particle reinforced magnesium-based composite material, the specific preparation method comprising the following steps:

[0036] (1) Preparation of titanium particle preform: Weigh 2g of titanium particles with an average particle size of 80nm and 8g of magnesium chips with an average particle size of 75μm, put them into a stainless steel ball mill jar, add 50g of stainless steel balls, repeatedly evacuate and then flush with argon for 3 After the second time, under the protection of argon, the ball milled for 90 minutes, the ball milling speed was 80rmp, and the mixed powder of titanium particles and magnesium chips was obtained by sieving after ball milling. body;

[0037] (2) Stirring casting molding: SF at a volume ratio of 1:99 6 and CO 2 Under the protection of gas, put 990g of AZ31B magnesium alloy ingot into the crucible to melt, then add 10g of titanium particle preform obtained in step (1) into the magnesium melt and keep it...

Embodiment 3

[0040] A method for preparing a titanium particle reinforced magnesium-based composite material, the specific preparation method comprising the following steps:

[0041](1) Lamination preparation of titanium particles coated with aluminum foil: Weigh 30g of titanium particles with an average particle size of 8 μm, lay them flat on an aluminum foil with a width of 250 mm, and roll the aluminum foil with a single width of 5 mm along one side of the aluminum foil, and finally roll it into a long Strip and lightly press out the air to obtain a laminate of titanium particles wrapped in aluminum foil;

[0042] (2) Stirring casting molding: SF at a volume ratio of 1:99 6 and CO 2 Under the protection of gas, put 970g of AZ31B magnesium alloy ingot into the crucible to melt, then add the aluminum foil-coated titanium particles containing 30g of titanium particles obtained in step (1) into the magnesium melt at 630°C, and keep it warm for 10min After cooling down to 630°C to form a s...

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Abstract

The invention discloses a preparation method of a metal titanium particle reinforced magnesium-based composite material. The preparation method mainly solves the problems that metal titanium particles are difficult to add and uneven in dispersion, and the comprehensive mechanical property of the magnesium-based composite material is poor. The magnesium alloy is melted in stirring equipment filled with carbon dioxide and sulfur hexafluoride protective gas, and then the titanium particle preforms or the aluminum foil coated titanium particle laminates are added, so that the burning loss of the titanium particles can be avoided. And then mechanical stirring, ultrasonic treatment and rapid cooling are applied, so that the titanium particles can be uniformly dispersed, and sedimentation of the titanium particles is avoided. And finally, the titanium particle reinforced magnesium-based composite material is subjected to hot extrusion deformation, and the titanium particles are further dispersed. The titanium particles can hinder grain size growth in the hot extrusion deformation process, and meanwhile the strength and plasticity of the composite material are improved. The titanium particles can also weaken the basal texture of the composite material, and the plasticity of the composite material is effectively improved. Compared with a matrix alloy, the magnesium-based composite material prepared by the method has higher strength and plasticity.

Description

technical field [0001] The invention relates to the technical field of magnesium-based composite materials, in particular to a preparation method of metal titanium particle-reinforced magnesium-based composite materials. Background technique [0002] Magnesium-based composites have the advantages of high specific strength, high elastic modulus and good wear resistance. It has broad application prospects and value in the fields of automobile, military industry and aerospace. At present, there are two major difficulties in the preparation of magnesium-based composites, which greatly limit the development of magnesium-based composites. One is that the interfacial bonding between the reinforcement phase and the magnesium matrix is ​​poor; the other is that the reinforcement is difficult to disperse in the magnesium matrix. [0003] The commonly used reinforcing phases of magnesium-based composite materials include ceramic particles such as silicon carbide, aluminum oxide, boro...

Claims

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Application Information

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IPC IPC(8): C22C23/00B22F9/04B22F3/02B22D1/00B22D27/00C22C1/02B21C23/00
CPCC22C23/00B22F9/04B22F3/02B22D1/00B22D27/00C22C1/02B21C23/001B22F2009/043
Inventor 陈先华叶俊镠李建波潘复生
Owner CHONGQING UNIV
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