Metallic titanium particle reinforced magnesium-based composite material and vacuum stirring casting method and application thereof

A particle-reinforced, composite material technology, applied in the field of magnesium alloys, can solve the problems of complex process, long preparation process and high preparation cost

Active Publication Date: 2021-05-18
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the powder metallurgy method can obtain magnesium-based composite materials with uniform distribution of titanium metal particles, the preparation process is long and complicated, which leads to high preparation costs
Although the preparation cost of the semi-solid stirred casting method is significantly reduced, because metal magnesium is very easy to oxidize, the titanium particle-reinforced magnesium-based composite material prepared contains a large number of oxidized inclusions, which cannot achieve excellent comprehensive mechanical properties.

Method used

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  • Metallic titanium particle reinforced magnesium-based composite material and vacuum stirring casting method and application thereof
  • Metallic titanium particle reinforced magnesium-based composite material and vacuum stirring casting method and application thereof
  • Metallic titanium particle reinforced magnesium-based composite material and vacuum stirring casting method and application thereof

Examples

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Effect test

Embodiment 1

[0053] What this embodiment provides is metal titanium particles reinforced AZ31 magnesium alloy composite material, the average particle size of titanium particles is 30 μm, and the volume fraction is 5%, and its preparation process by vacuum stirring casting method is as follows:

[0054] Step 1: Put 7kg of AZ31 magnesium alloy ingot into the crucible in the vacuum stirring casting equipment, close the equipment and evacuate to 0.1Pa;

[0055] Step 2: Open the gas distribution system, and pass in the mixed protective gas of carbon dioxide and sulfur hexafluoride with a volume ratio of 100:1 to above 0.1 MPa;

[0056] Step 3: Turn on the crucible heating device to heat up to 710°C to melt the AZ31 magnesium alloy ingot, and keep it warm for 0.5h. At the same time, 1 kg of titanium powder with an average particle size of titanium particles of 30 μm and a volume fraction of 5% is put into a container containing titanium particles, and heated to 100° C. for preheating and heat p...

Embodiment 2

[0060] The difference between this embodiment and Embodiment 1 is that the magnesium alloy substrate is AZ91 magnesium alloy.

[0061] figure 2 For the microstructure of the titanium metal particle reinforced AZ91 magnesium alloy composite material corresponding to this example, it is observed that the metal titanium particles are evenly distributed in the alloy.

Embodiment 3

[0063] The difference between this example and Example 2 lies in that the average particle diameter of metal titanium particles is 5 μm.

[0064] image 3 For the microstructure of the titanium metal particle reinforced AZ91 magnesium alloy composite material corresponding to this example, it is observed that the metal titanium particles are evenly distributed in the alloy.

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Abstract

The invention discloses a metallic titanium particle reinforced magnesium-based composite material and a vacuum stirring casting method and application thereof, and relates to the field of magnesium alloys. The vacuum stirring casting method comprises the steps that carbon dioxide and sulfur hexafluoride mixed protective gas is introduced into vacuum stirring casting equipment, then the magnesium alloys are heated and melted, preheated metal titanium particles are added, uniform stirring is conducted, and then casting forming is conducted. According to the vacuum stirring casting method of the metallic titanium particle reinforced magnesium-based composite material, the scientific problem that a traditional inorganic non-metal ceramic reinforced magnesium-based composite material has high strength and high modulus, but has low plasticity and high brittleness and the technical problems of high cost and high possibility of oxide inclusion existing in a conventional stirring casting and powder metallurgy method for preparing the composite material are solved, so that the metallic titanium particle reinforced magnesium-based composite material with low cost, low oxide inclusion and excellent comprehensive mechanical properties is prepared. The metallic titanium particle reinforced magnesium-based composite material can be widely applied to 3C electronic products and parts for transportation or aerospace.

Description

technical field [0001] The invention relates to the field of magnesium alloys, in particular to a magnesium-based composite material reinforced with titanium metal particles and a vacuum stirring casting method and application thereof. Background technique [0002] Magnesium alloy is currently the lightest metal structural material available, so it has received extensive attention in 3C electronic products, transportation, aerospace and other fields that have a strong demand for lightweight components. However, compared with existing industrial metal structural materials such as steel and aluminum alloys, the strength and stiffness of magnesium alloys are relatively low, so the application of magnesium alloys is limited. [0003] In order to effectively improve the strength and rigidity of magnesium alloys, inorganic non-metallic ceramics with high strength and high rigidity such as oxides, carbides and nitrides are usually used as reinforcing phases to composite magnesium a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C23/00C22B9/04B22D21/04
CPCC22C1/02C22C23/00C22B9/04B22D21/04
Inventor 康跃华郑开宏潘复生李新涛张静韩胜利冯波赵虎周楠冯晓伟尹翠翠黄正华徐静
Owner GUANGDONG INST OF NEW MATERIALS
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