A method for preparing titanium-based spherical powder with fine particle size by gas atomization

A spherical powder, gas atomization technology, applied in the field of powder metallurgy, can solve the problem of high technical requirements, achieve the effect of improving the yield of fine powder, high yield of fine powder, and improving the problem of hollow ratio

Active Publication Date: 2019-01-22
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the structural optimization design and transformation of these components not only require long-term technical accumulation and support, but also require extremely high technical requirements

Method used

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  • A method for preparing titanium-based spherical powder with fine particle size by gas atomization
  • A method for preparing titanium-based spherical powder with fine particle size by gas atomization
  • A method for preparing titanium-based spherical powder with fine particle size by gas atomization

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Experimental program
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Effect test

Embodiment 1

[0026] The method of this embodiment is:

[0027] Step 1. Put the Ti6Al4V alloy ingot and tin block into a water-cooled copper crucible, and then place it in the melting chamber of the vacuum induction melting gas atomization equipment, and evacuate the melting chamber until the vacuum degree in the furnace is not greater than 5Pa. Vacuum induction melting is carried out at a temperature of 1700°C; the amount of the tin material is 2% of the total mass of the titanium alloy raw material and the tin material;

[0028] Step 2. After the Ti6Al4V alloy raw material and tin material described in step 1 are melted by vacuum induction melting, fill the melting chamber with argon gas for protection, and the pressure of the filled argon gas is 0.5 bar; The graphite guide tube is heated, and the Ti6Al4V alloy raw material and tin material are completely melted to produce a molten liquid with low viscosity. The molten liquid falls freely to the atomization chamber through the heated grap...

Embodiment 2

[0037] The method of this embodiment is:

[0038] Step 1. Put the Ti6Al4V alloy ingot and tin block into a water-cooled copper crucible, and then place it in the melting chamber of the vacuum induction melting gas atomization equipment, and evacuate the melting chamber until the vacuum degree in the furnace is not greater than 5Pa. Vacuum induction melting is carried out at a temperature of 1800°C; the amount of the tin material is 1% of the total mass of the titanium alloy raw material and the tin material;

[0039] Step 2. After the titanium alloy raw material and tin material described in step 1 are melted by vacuum induction melting, fill with argon gas for protection, and the pressure of filling argon gas is 0.1 bar; After heating, when the Ti6Al4V alloy raw material and tin material are completely melted, a low-viscosity molten liquid is produced. The molten liquid falls freely to the atomization chamber through the heated graphite guide tube for gas atomization treatmen...

Embodiment 3

[0042] The method of this embodiment is:

[0043] Step 1. Put the Ti6Al4V alloy ingot and tin block into a water-cooled copper crucible, and then place it in the melting chamber of the vacuum induction melting gas atomization equipment, and evacuate the melting chamber until the vacuum degree in the furnace is not greater than 5Pa. Vacuum induction melting is carried out at a temperature of 1600°C; the amount of the tin material is 3% of the total mass of the titanium alloy raw material and the tin material;

[0044] Step 2. After the Ti6Al4V alloy raw material and tin material described in step 1 are melted by vacuum induction melting, fill with argon gas for protection, and the pressure of filling argon gas is 0.5 bar; After heating, when the Ti6Al4V alloy raw material and tin material are completely melted, a low-viscosity molten liquid is produced. The molten liquid falls freely to the atomization chamber through the heated graphite guide tube for gas atomization treatment...

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Abstract

The invention discloses a method for preparing titanium-based spherical powder with fine particle size by gas atomization. The method is as follows: 1. Put titanium-based raw materials and tin materials into a melting crucible, and then place them in vacuum induction melting gas atomization equipment Vacuum induction smelting is carried out in the smelting chamber; 2. After the titanium-based raw material and tin material are melted by vacuum induction smelting, they are filled with argon for protection, and then the graphite guide tube at the bottom of the melting crucible is heated, and the titanium-based raw material is The molten liquid produced after melting with the tin material falls freely into the atomization chamber through the heated graphite guide tube, and the atomized powder is obtained after the vacuum induction melting gas atomization treatment, and the titanium-based spherical powder is obtained in the collection tank. In the present invention, the tin element is introduced into the titanium raw material or titanium alloy raw material to reduce the viscosity of the molten liquid obtained after smelting, so that it is easy to be broken during gas atomization, and the particle size of the obtained powder becomes finer. Among them, the titanium-based spherical powder The yield of powder with a medium particle size less than 45 μm is not less than 28%, the internal pores of the powder are reduced, and the number of hollow powders is reduced.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a method for preparing titanium-based spherical powder with fine particle size by gas atomization. Background technique [0002] Spherical titanium and titanium alloy powders are important basic raw materials for high-performance powder metallurgy titanium and titanium alloy near-net shape manufacturing and processing because of their good fluidity, less pore inclusions, and low impurity content. In recent years, the demand for high-performance powder metallurgy titanium and titanium alloy parts in aviation, aerospace, shipbuilding, energy, automobile and biomedical industries has doubled. At the same time, the new rapid prototyping equipment and process technology represented by 3D printing technology (Laser rapid manufacturing, electron beam selective melting technology) has achieved rapid development, and powder metallurgy titanium and titanium alloys hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08B22F1/00
CPCB22F9/082B22F2009/0848B22F1/065
Inventor 赵少阳陈刚汤慧萍李增峰谈萍殷京瓯葛渊沈垒文佳艺
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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