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Spherical titanium-aluminum alloy powder and preparation method and application thereof

A titanium-aluminum alloy and spherical technology is applied in the field of spherical titanium-aluminum alloy powder and its preparation. High density, solve the effect of bad sphericity

Inactive Publication Date: 2020-09-25
四川容克斯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production process consumes a large amount of inert gas, which increases the cost. There are more satellite powders on the powder particles, which affects the fluidity of the powder. At the same time, there are some hollow powders, which are easy to cause metallurgical defects in the printed parts, and the particle size distribution range of the powder particles Wider, suitable for the proportion of powder in the size range required by additive manufacturing

Method used

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  • Spherical titanium-aluminum alloy powder and preparation method and application thereof
  • Spherical titanium-aluminum alloy powder and preparation method and application thereof

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preparation example Construction

[0028] In an exemplary embodiment of the present invention, the preparation method of the spherical titanium-aluminum alloy powder may include: titanium-aluminum alloy bar stock → soaking treatment → turning processing → installing raw material rods → vacuuming → filling inert gas → Arc ignition→centrifugal atomization→cooling→sieving and packaging.

[0029] In this embodiment, the titanium-aluminum alloy bar (also referred to as a raw material bar) can be selected: a bar of a vacuum consumable electrode melting ingot or a forged alloy bar, or a titanium alloy produced by powder metallurgy. Aluminum alloy bars. Titanium-aluminum alloy rods may include chemical compositions in terms of atomic percent (at.%):

[0030] 40-69% Ti, for example, 41%, 45%, 50%, 55%, 60%, 65, 68%, etc.

[0031] 30-49% Al, such as 31%, 35%, 40%, 45%, 48%, etc.

[0032] The rest: one or more of niobium, vanadium, chromium, tungsten, yttrium and other elements, as well as unavoidable impurity elements...

example 1

[0050] Ti-48Al-2Cr-2Nb series titanium-aluminum alloy rods are used as raw materials, and the atomic percentage (at.%) of the chemical composition of the titanium-aluminum alloy rods is Al: 47-49%, Cr: 1.5-2.5%, Nb: 1.5-2.5 %, the balance is Ti and impurity elements, the relative density is greater than 99%, and the mass percent wt% of its chemical composition is shown in Table 1.

[0051] Process the titanium-aluminum alloy rod into a titanium-aluminum alloy raw material rod with a diameter of ф50×450mm, and remove impurities on the surface of the raw material rod.

[0052] Put the raw material rod after removing impurities into the arc centrifugal atomization device (ie arc melting rotary atomization device), the vacuum degree is ≤3×10 -3 Pa, and then the inert gas argon is introduced into the device. Under the condition of ensuring that the oxygen content in the atomization chamber is ≤4ppm, the arc melting centrifugal atomization device is turned on under the protection o...

example 2

[0063] Ti-45Al-8Nb-W-Y series titanium aluminum alloy rod is used as raw material, the main chemical composition of Ti-45Al-8Nb-W-Y series (atomic percentage at.%) Al: 45-46%, Nb: 5-10%, W: 0.2-1%, Y: 0.01-0.1%, the balance is Ti and impurity elements, and its relative density is greater than 99%. Process the titanium-aluminum alloy rod into a titanium-aluminum alloy raw material rod with a diameter of Ф80×350 mm, and remove impurities on the surface of the raw material rod.

[0064] Put the titanium-aluminum alloy raw material rod into the arc centrifugal atomization device, and the vacuum degree is ≤3×10 -3 Pa, and then a mixed inert gas is introduced into the device.

[0065] The volume ratio of argon gas with a purity of 99.999% in the mixed inert gas fed in is 70%, the volume ratio of helium gas with a purity of 99.999% is 30%, the total flow rate of the mixed inert gas is 670L / min, and its pressure is 0.6±0.05 MPa.

[0066] To ensure that the oxygen content in the ato...

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Abstract

The invention provides spherical titanium-aluminum alloy powder and a preparation method and application thereof. The preparation method comprises the steps of placing a titanium-aluminum alloy rod ina vacuum environment; introducing inert gas into the vacuum environment to replace air, wherein the oxygen content in the vacuum environment after replacement is below 5 ppm; melting the end surfaceof the titanium-aluminum alloy rod into a liquid film by using electric arcs; rotating the titanium-aluminum alloy rod, and crushing the liquid film into fine liquid drops under the action of centrifugal force; and performing cooling to obtain the spherical titanium-aluminum alloy powder. The spherical titanium-aluminum alloy powder can comprise the titanium-aluminum alloy powder prepared by the preparation method. The application comprises application in the field of laser or electron beam additive manufacturing and application in the field of laser or electron beam cladding. The invention has the beneficial effects of high production efficiency and low cost, and the produced titanium-aluminum alloy powder has the characteristics of small powder particle size, narrow particle diameter distribution interval, high powder particle sphericity, good fluidity, high apparent density, high tap density, few inclusions and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of titanium-aluminum alloy powder, in particular to a spherical titanium-aluminum alloy powder and its preparation method and application. Background technique [0002] Due to its low density, titanium-aluminum alloy has high specific strength and specific elastic modulus, and it can still maintain high enough strength and rigidity at high temperatures. At the same time, it also has good creep and oxidation resistance, and has the potential to promote The potential for structural material change, titanium-aluminum alloy is considered to be a high-temperature structural material with great application potential. However, due to the low room temperature plasticity, poor toughness and difficulty in machining of titanium-aluminum alloy, it is still the main obstacle for mass production of titanium-aluminum alloy parts. [0003] At present, the preparation of titanium-aluminum alloy is mainly base...

Claims

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Application Information

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IPC IPC(8): B22F9/10B22F1/00C22C14/00B33Y70/00
CPCB22F9/10C22C14/00B33Y70/00B22F1/065
Inventor 何安西
Owner 四川容克斯科技有限公司
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