Preparation method for high-strength and high-plasticity titanium-magnesium composite material

A composite material and high plasticity technology, applied in the field of preparation of high-strength and high-plastic titanium-magnesium composite materials, can solve the problems of complicated process, low production efficiency, poor plasticity, etc. Production time-saving effects

Inactive Publication Date: 2020-12-29
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing a high-strength and high-plasticity titanium-magnesium composite material, which solves the problems of complicated technological process, low production efficiency, high energy consumption and poor plasticity of the existing titanium-magnesium composite material. good question

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  • Preparation method for high-strength and high-plasticity titanium-magnesium composite material
  • Preparation method for high-strength and high-plasticity titanium-magnesium composite material
  • Preparation method for high-strength and high-plasticity titanium-magnesium composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Weigh 2.5g Ti element powder with particle size <37 μm and 47.5g AZ91 alloy powder with particle size <74 μm;

[0023] 2) Put the raw materials weighed in step 1) into the ball mill, add 500g stainless steel balls, first vacuumize and then fill with argon, repeat the pumping and filling for 3 times, then ball mill in the argon environment, the speed is 50rpm, the powder is mixed evenly after ball milling for 2 hours, and the mixed powder is obtained;

[0024] 3) Place the mixed powder obtained in step 2) in a graphite mold, and then activate spark plasma sintering by current during pressurization, raise the temperature to 500°C at a heating rate of 50°C / min, and hold it at 80MPa for 10 minutes, then Cool down to room temperature at 50°C / min to finally obtain a magnesium-based composite material, and then make the composite material into a sample to obtain a prefabricated sample.

[0025] The Ti particle reinforced AZ91 composite material obtained in this embodiment ...

Embodiment 2

[0028] 1) Weigh 5 g of Ti element powder with particle size <37 μm and 45 g of AZ91 alloy powder with particle size <74 μm;

[0029] 2) Put the raw materials weighed in step 1) into the ball mill, add 500g stainless steel balls, first vacuumize and then fill with argon, repeat the pumping and filling for 3 times, then ball mill in the argon environment, the speed is 50rpm, the powder is mixed evenly after ball milling for 2 hours, and the mixed powder is obtained;

[0030] 3) Place the mixed powder obtained in step 2) in a graphite mold, and then activate spark plasma sintering by current during pressurization, raise the temperature to 500°C at a heating rate of 50°C / min, and hold it at 80MPa for 10 minutes, then Cool down to room temperature at 50°C / min to finally obtain a magnesium-based composite material, and then make the composite material into a sample to obtain a prefabricated sample.

Embodiment 3

[0032] 1) Weigh 7.5g Ti element powder with particle size <37 μm and 42.5g AZ91 alloy powder with particle size <74 μm;

[0033]2) Put the raw materials weighed in step 1) into a ball mill, add 500g of stainless steel balls, first vacuumize and then fill with argon, repeat the pumping and filling for 3 times, then perform ball milling in an argon environment at a speed of 50rpm, the powder is mixed evenly after ball milling for 2 hours, and the mixed powder is obtained;

[0034] 3) Put the mixed powder obtained in step 2) into a graphite mold, and then activate spark plasma sintering by current during pressurization, raise the temperature to 500°C at a heating rate of 50°C / min, and hold it at 80MPa for 10 minutes, then Cool down to room temperature at 50°C / min to finally obtain a magnesium-based composite material, and then make the composite material into a sample to obtain a prefabricated sample.

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Abstract

The invention discloses a preparation method for a high-strength and high-plasticity titanium-magnesium composite material. A spark plasma sintering (SPS) method is adopted to prepare a titanium particle reinforced magnesium-based composite material; micron-sized titanium particles are distributed in a matrix through control of process conditions; the combination with an interface of the matrix ismore tight; the structure is more compact; a metallographic structure is displayed; and no second phase Mg17Al12 is distributed along the grain boundary in a magnesium matrix, so that the stress in crystal grains is remarkably reduced, the crystal grains can bear large deformation before being broken, and the plasticity of the magnesium matrix composite material is improved. The titanium grain boundary is zigzag, so that the crack propagation resistance is increased, the dislocation is inhibited, the dislocation interaction is weakened, the macroscopic plastic deformation capacity of the material is improved, and the strengthening and toughening effects of titanium particles in the magnesium matrix are fully exerted. Therefore, the magnesium-based composite material prepared by the methodhas high strength and high plasticity. The preparation method is simple in technological process, short in production time, low in cost and beneficial to large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy composite materials, in particular to a preparation method of high-strength and high-plasticity titanium-magnesium composite materials. Background technique [0002] At present, with the transformation of my country's economy, the development of high-tech industries requires a large number of high-performance materials, and magnesium alloys have high specific strength and specific stiffness and have become the most promising lightweight structural materials. For magnesium-based composites, microstructure regulation is one of the most effective ways to strengthen and toughen materials. Ceramic particles are often used as reinforcements, which not only increase the hardness of materials, but also significantly reduce the plasticity of materials. application of magnesium matrix composites. Contrary to ceramic reinforcements, the crystallographic and physical characteristics of titanium are c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C23/00B22F3/105
CPCB22F3/105B22F2003/1051C22C1/0408C22C23/00
Inventor 陈先华唐彪李建波吴波罗欢谭军潘复生
Owner CHONGQING UNIV
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