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Preparation method for porous titanium and porous titanium alloy

A technology of titanium alloy and porous titanium, which is applied in the field of preparation of porous titanium and porous titanium alloy, can solve the problems of lack of system, no characterization of coating performance, single spraying process and heat treatment process, etc., to achieve simple process and short production cycle , good controllability

Inactive Publication Date: 2008-10-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these preliminary studies only involve the preparation of thinner coatings, and there is no characterization of the properties of the prepared coatings. The spraying process and heat treatment process are single and lack systematic

Method used

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  • Preparation method for porous titanium and porous titanium alloy
  • Preparation method for porous titanium and porous titanium alloy
  • Preparation method for porous titanium and porous titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Choose 11-45μm titanium powder. The substrate is a 45mm×30mm×4mm low-carbon steel plate, and the surface is roughened with -100 mesh alumina fine sand before spraying. The working gas of cold spraying is compressed air, the gas pressure at the inlet of the spray gun is 2.7MPa, and the gas temperature is 500-520°C; the powder feeding gas is argon, the pressure is 3.0MPa; the powder feeding rate is about 30g / min; the spraying distance is 30mm, and the moving speed of the spray gun is 150mm / s. The thickness of the coating layer is about 5mm. After spraying, the substrate is peeled off, and then vacuum heat treatment is carried out, the heat treatment temperature is 850°C, the heat preservation time is 4 hours, and then cooled to room temperature with the furnace. Observe the coating section structure, such as figure 2 It can be seen that the distribution of pores in the coating is relatively uniform. The average porosity of the sprayed state is about 11%, and the ave...

Embodiment 2

[0026] Choose 45-160μm titanium powder. The substrate is a 45mm×30mm×4mm low-carbon steel plate, and the surface is roughened with -100 mesh alumina fine sand before spraying. The working gas of cold spraying is compressed air, the gas pressure at the inlet of the spray gun is 2.8MPa, and the gas temperature is about 550°C; the powder feeding gas is argon, the pressure is 3.1Mpa; the powder feeding rate is about 30g / min; the spraying distance is 30mm, and the moving speed of the spray gun is 150mm / s. The thickness of the coating layer is about 5mm. After spraying, the substrate is peeled off, and then vacuum heat treatment is carried out, the heat treatment temperature is 850°C, the heat preservation time is 4 hours, and then cooled to room temperature with the furnace. Observe the coating section structure, such as image 3 It can be seen that the distribution of pores in the coating is relatively uniform. The average porosity of the sprayed state is about 15%, and the a...

Embodiment 3

[0028] Choose 11-63μm Ti-6Al-4V powder. The substrate is a 45mm×30mm×4mm low-carbon steel plate, and the surface is roughened with -100 mesh alumina fine sand before spraying. The working gas for cold spraying is compressed air, the gas pressure at the inlet of the spray gun is 2.8MPa, and the gas temperature is about 550°C; the powder feeding gas is argon, the pressure is 3.1MPa; the powder feeding rate is about 30g / min; the spraying distance is 30mm, and the moving speed of the spray gun is 150mm / s. The thickness of the coating layer is about 5mm. After spraying, the substrate is peeled off, and then vacuum heat treatment is carried out, the heat treatment temperature is 850°C, the heat preservation time is 4 hours, and then cooled to room temperature with the furnace. Observe the coating section structure, such as Figure 4 It can be seen that the distribution of pores in the coating is relatively uniform. Because the titanium alloy has high strength and poor deformati...

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Abstract

The invention relates to a method for preparing porous titanium and tporous titanium alloy, which is characterized in that the preparing steps are as follows: Ti powder or Ti alloy powder is baked in an oven; grit-blasting coursing pretreatment is performed on the surface of a flat shape matrix or the surface of a club-shaped matrix; the cold spraying method is used to spray the prepared Ti powder or the Ti alloy powder on the matrix; and then a coating layer gained in step three is put in a vacuum heat treatment furnace for heat treatment. The invention has the characteristics of simple technology, short production cycle and low cost. The porosity of the porous titanium and the porous titanium alloy prepared by the method is distributed evenly with good controllability. The porosity of the porous titanium and the porous titanium alloy prepared by the method can be changed in the range of between 5 and 50 percent, and the intensity can be changed in the range between 30 and 75 MPa according to the porosity. The controllability of the method is good and the production efficiency is high, which is favorable for industrialization.

Description

technical field [0001] The invention relates to a preparation method of porous titanium and porous titanium alloy, which adopts cold spray forming technology and cooperates with vacuum heat treatment to obtain the required porous material. Mainly suitable for biological materials, but also for structural materials in special cases. Background technique [0002] Metal foam or metal porous material is a new type of engineering material that integrates physical function and structure, which developed rapidly internationally in the late 1980s. It is a functional material with special properties such as good permeability, controllable pores and pore sizes, stable shape, high temperature resistance, thermal shock resistance, regeneration, and machinability. Metal porous materials are widely used in filtration, separation, noise reduction, gas distribution, catalysis, heat exchange and other processes in aviation, aerospace, atomic energy, petrochemical, metallurgy, machinery, med...

Claims

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Application Information

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IPC IPC(8): C22C1/08
Inventor 李文亚
Owner NORTHWESTERN POLYTECHNICAL UNIV
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