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Method for preparing titanium based spherical powder with reduced particle size through gas atomization

A technology of spherical powder and gas atomization, which is applied in the field of powder metallurgy, can solve the problems of high technical requirements, and achieve the effects of increasing the yield of fine powder, improving physical properties and reducing viscosity

Active Publication Date: 2017-12-22
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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  • Method for preparing titanium based spherical powder with reduced particle size through gas atomization
  • Method for preparing titanium based spherical powder with reduced particle size through gas atomization
  • Method for preparing titanium based spherical powder with reduced particle size through gas atomization

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The method of this embodiment is:

[0027] Step 1. Put Ti6Al4V alloy ingots and tin blocks into a water-cooled copper crucible, and then place them 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 more than 5 Pa. Vacuum induction smelting at a temperature of 1700°C; the amount of the tin material is 2% of the total mass of the titanium alloy raw materials and the tin material;

[0028] Step 2. After the Ti6Al4V alloy raw materials and tin materials described in step one are melted by vacuum induction melting, fill the melting chamber with argon protection, and the pressure of the filled argon is 0.5bar; then the bottom of the water-cooled copper crucible The graphite draft tube is heated, and the Ti6Al4V alloy raw materials and tin material are completely melted to produce a low-viscosity molten liquid. The molten liquid falls freely into the atomization chamber th...

Embodiment 2

[0037] The method of this embodiment is:

[0038] Step 1. Put Ti6Al4V alloy ingots and tin blocks into a water-cooled copper crucible, and then place them 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 more than 5 Pa. Vacuum induction smelting is performed at a temperature of 1800°C; the amount of the tin material is 1% of the total mass of the titanium alloy raw materials 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, they are filled with argon gas for protection, and the pressure of the argon gas is 0.1bar; and then the graphite draft tube located at the bottom of the water-cooled copper crucible When the Ti6Al4V alloy raw materials and tin are completely melted, a low-viscosity molten liquid is produced. The molten liquid falls freely into the atomization chambe...

Embodiment 3

[0042] The method of this embodiment is:

[0043] Step 1. Put Ti6Al4V alloy ingots and tin blocks into a water-cooled copper crucible, and then place them 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 more than 5 Pa. Vacuum induction melting is performed at a temperature of 1600°C; the amount of the tin material is 3% of the total mass of the titanium alloy raw materials and the tin material;

[0044] Step 2. After the Ti6Al4V alloy raw materials and tin materials described in step 1 are melted by vacuum induction melting, they are filled with argon gas for protection, and the pressure of the argon gas is 0.5bar; and then the graphite draft tube at the bottom of the water-cooled copper crucible When the Ti6Al4V alloy raw materials and tin are completely melted, a low-viscosity molten liquid is produced. The molten liquid falls freely into the atomization chamber throug...

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Abstract

The invention discloses a method for preparing titanium based spherical powder with reduced particle size through gas atomization. The method comprises steps as follows: step one, a titanium based raw material and a tin material are placed in a smelting crucible, and the smelting crucible is put in a smelting chamber of a vacuum induction melting gas atomization equipment for vacuum induction melting; step two, after the titanium based raw material and the tin material are melted through vacuum induction melting, argon is introduced for protection, a graphite diversion pipe located at the bottom of the smelting crucible is heated, a melted liquid produced after melting of the titanium based raw material and the tin material freely falls into an atomization chamber through the graphite diversion pipe and subjected to vacuum induction melting gas atomization treatment, atomized powder is obtained, and titanium based spherical powder is obtained from a collecting tank. According to the method, tin is introduced into the titanium raw material or a titanium alloy raw material for reducing viscosity of the melted liquid obtained after smelting, so that the raw materials are easy to break during gas atomization, the particle size of the prepared powder becomes small, wherein the yield of the powder with the particle size smaller than 45 mu m in the titanium based spherical powder is not lower than 28%, pores in the powder are reduced, and the amount of hollow powder is reduced.

Description

Technical field [0001] The invention belongs to the technical field of powder metallurgy, and specifically relates to a method for preparing a titanium-based spherical powder with a refined particle size by gas atomization. Background technique [0002] Spherical titanium and titanium alloy powder is an important basic raw material for high-performance powder metallurgy titanium and titanium alloy near net shape manufacturing due to its advantages of good fluidity, less pore inclusions and low impurity content. In recent years, the aviation, aerospace, shipbuilding, energy, automotive and biomedical industries have doubled the demand for high-performance powder metallurgy titanium and titanium alloy parts. At the same time, new rapid prototyping equipment and process technology represented by 3D printing technology (Laser rapid manufacturing, electron beam selective melting technology) has achieved rapid development, powder metallurgy titanium and titanium alloys usher in histori...

Claims

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Application Information

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Patent Type & Authority Applications(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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