Preparation method of particle-reinforced wearable porous titanium

A particle-reinforced, porous titanium technology, applied in the field of powder metallurgy molding, can solve the problems of porous titanium porosity, pore size and shape are difficult to control, pore size and shape cannot be controlled, and gas entrainment technology is complex, etc., to achieve good resistance Oxidation ability, good wear resistance, high hardness effect

Inactive Publication Date: 2013-09-11
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have some inherent disadvantages. For example, the direct sintering of powder is highly dependent on the raw material powder, and the size and shape of the pores cannot be controlled; the thermal spraying method needs to be sprayed in a vacuum chamber due to its high temperature characteristics. Avoid oxidation, but vacuum plasma spraying equipment is expensive, and there are still problems such as pore uniformity; gas entrainment technology is complex, costly, and has low porosity
[0004] The existing technology mainly has the difficulty of controlling the porosity, pore size and pore shape of porous titanium, especially when porous titanium is used as a filter material, when a medium passes through the pores, the wear resistance of porous titanium is insufficient, which affects the service life of the material

Method used

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Effect test

preparation example Construction

[0020] A method for preparing particle-reinforced wear-resistant porous titanium, comprising the following steps:

[0021] S1. Thoroughly mix titanium powder and wear-resistant material particles in an amount of 0.2-1% by weight of titanium powder;

[0022] S2. Add a pore-forming agent in an amount of 0.1 to 1% of the weight of the mixed powder to the mixed powder obtained in step S1, and mix well; the mixing of materials can be carried out in a mixer;

[0023] S3. Compressing the mixture obtained in step S2 under a pressure of 30-80 MPa to obtain a powder compact;

[0024] S4. Heat the obtained powder compact in a heating furnace to 200-400°C, keep it warm for 0.5-2h, remove the pore-forming agent, and then place the powder compact in a vacuum sintering furnace at a temperature of 1150-1300°C for sintering for 2 ~4h, the particle-reinforced wear-resistant porous titanium material can be obtained.

[0025] The particle size of the pore-forming agent is 10-100 μm, and the por...

Embodiment 1

[0030] A method for preparing particle-reinforced wear-resistant porous titanium, comprising the following steps:

[0031] S1. Fully mix the pure titanium powder with a particle size of 75 μm and the wear-resistant material particles added in an amount of 0.2% by weight of the pure titanium powder. The wear-resistant material particles are Ti(C,N) powder with a particle size of 2-10 μm;

[0032] S2. Add a pore-forming agent in an amount of 0.1 to 1% by weight of the mixed powder to the mixed powder obtained in step S1. The pore-forming agent is ammonium bicarbonate particles with a particle size of 50 μm, and fully mixed uniformly; in the feeder;

[0033] S3. Compressing the mixture obtained in step S2 under a pressure of 80 MPa to obtain a powder compact;

[0034] S4. Heat the obtained powder compact to 200°C in a heating furnace, keep it warm for 1h, remove the pore-forming agent particles, and then place the powder compact in a vacuum sintering furnace at a temperature of ...

Embodiment 2

[0036] A method for preparing particle-reinforced wear-resistant porous titanium, comprising the following steps:

[0037] S1. Fully mix the pure titanium powder with a particle size of 45 μm and the wear-resistant material particles added in an amount of 0.2% by weight of the pure titanium powder. The wear-resistant material particles are Ti(C,N) powder with a particle size of 2-10 μm;

[0038] S2. Add a pore-forming agent in an amount of 0.1 to 1% by weight of the mixed powder to the mixed powder obtained in step S1. The pore-forming agent is polystyrene foam particles with a particle size of 10 μm, and fully mixed uniformly; the material mixing can be in the mixer;

[0039] S3. Compressing the mixture obtained in step S2 under a pressure of 30 MPa to obtain a powder compact;

[0040] S4. Heat the obtained powder compact to 400°C in a heating furnace, keep it warm for 0.5h, remove the pore-forming agent particles, and then place the powder compact in a vacuum sintering furn...

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Abstract

The invention discloses a preparation method of particle-reinforced wearable porous titanium. The preparation method comprises the following steps of: S1, sufficiently and uniformly mixing the titanium powder and the wearable material particle; S2, adding a pore-forming agent to the powder mixture, and sufficiently and uniformly mixing; and S3, pressing and forming; S4, heating up the pressed powder blank in a heating furnace, removing the pore-forming agent, and placing in a vacuum sintering furnace for sintering to obtain the particle-reinforced wearable porous titanium. The preparation method of the particle-reinforced wearable porous titanium has the beneficial effects as follows: the process is simple, the device requirement is low, the processing cost is lowered and the operation is convenient; the porosity and the pore size can be controllable; the added pore-forming agent is low in cost, and the pore of the porous titanium can be controlled well; the added wearable hard particle has the characteristics of high melting point, high hardness, good antioxidant capacity, good lubricity and wear resistance and the like, so that the comprehensive performance of the porous titanium is improved well; the prepared porous titanium is uniform in pore distribution, good in wear and corrosion resistance, good in process controllability, simple and low in cost.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy forming, in particular to a method for preparing particle-reinforced wear-resistant porous titanium. Background technique [0002] Titanium and titanium alloys have excellent corrosion resistance and biocompatibility, and are widely used in filtration, catalysis, heat exchange and other processes in petrochemical, metallurgical, pharmaceutical and environmental protection industries. Porous materials are a new type of structural and functional materials in the current material world, and have been applied in many fields. Porous titanium and its alloys combine the characteristics of titanium alloy and metal foam, which can reduce the weight of the material without weakening its strength, and also have high toughness and corrosion resistance. Therefore, porous titanium and its alloys have broad application prospects. For example, porous titanium can be used as sandwich structures, heat ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C14/00
Inventor 李玉和魏晓伟方明宪沈向前邓刚
Owner XIHUA UNIV
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