Method for reducing oxygen content of titanium powder prepared by using hydrogenation dehydrogenation method

A technology of hydrogenation dehydrogenation and oxygen content, applied in the field of powder metallurgy, can solve the problems of irregular shape, large specific surface area of ​​titanium powder, excessive impurity content, etc., and achieve the effect of sufficient reduction reaction and fast reaction speed

Active Publication Date: 2019-11-15
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process of this method is long, and the titanium powder produced has a large specific surface area and irregular shape, and it is very easy to react with oxygen to cause the impurity content to exceed the standard.
Oxygen content is a key parameter of titanium powder, and the defects in the purity of titanium powder prepared by hydrogenation dehydrogenation seriously restrict its application range

Method used

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  • Method for reducing oxygen content of titanium powder prepared by using hydrogenation dehydrogenation method
  • Method for reducing oxygen content of titanium powder prepared by using hydrogenation dehydrogenation method
  • Method for reducing oxygen content of titanium powder prepared by using hydrogenation dehydrogenation method

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Embodiment 1

[0046] (1) Send gaseous metal sodium into the inductively coupled plasma torch with mixed gas A as the working gas and side gas at a rate of 2 g / min, and the metal sodium is excited and ionized to obtain a strong reducing inductively coupled plasma torch, mixing Gas A is a mixture of helium and argon at a volume ratio of 1:9. The operating power of the plasma torch is 135kW, the temperature of the plasma torch is 12000K, the flow rate of the working gas is 60slpm, the flow rate of the edge gas is 350slpm, and the system pressure is 30kPa;

[0047] (2) With the mixed gas A as the powder feeding gas, the titanium powder (see figure 1 ) into the strong reducing inductively coupled plasma torch established in step (1) in a fluidized state, the powder feeding rate is 40g / min, after the titanium powder is melted, the oxygen element reacts with the active metal in the ionized state, and the reaction product floats in the molten Titanium powder surface, then the titanium powder leaves...

Embodiment 2

[0050] (1) Send the liquid sodium potassium alloy into the inductively coupled plasma torch with mixed gas A as the working gas and side gas at a rate of 3 g / min, and the metal sodium is excited and ionized to obtain a strong reducing inductively coupled plasma torch, Mixed gas A is composed of helium and argon at a volume ratio of 3:22. The operating power of the plasma torch is 140kW, the temperature of the plasma torch is 13000K, the flow rate of the working gas is 70slpm, the flow rate of the side gas is 400slpm, and the system pressure is 37kPa;

[0051] (2) With the mixed gas A as the powder feeding gas, the titanium powder obtained by the hydrodehydrogenation method, the particle size range is 70-120 microns, and the oxygen content is 2700ppm is sent into the strong reducing property established in step (1) in a fluidized state The plasma torch should be coupled, and the powder feeding rate is 60g / min. After the titanium powder is melted, the oxygen element reacts with t...

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Abstract

The embodiment of the invention provides a method for reducing the oxygen content of titanium powder prepared by using a hydrogenation dehydrogenation method, and belongs to the technical field of powder metallurgy. The method comprises the following steps that active metal is fed into an inductive coupled plasma torch to excite ionization to obtain a strong reducing induction coupling plasma torch, wherein working gas and side gas of the inductive coupled plasma torch are mixed gas A of helium and argon; the mixed gas A is taken as powder feeding gas to feed the titanium powder prepared by the hydrogenation dehydrogenation method into the strong reducing induction coupling plasma torch established through the step (1), and the titanium powder is separated from the strong reducing induction coupling plasma torch after being molten and is deposited and cooled to obtain reduced titanium powder; and the obtained reduced titanium powder is washed to remove residual active metal and oxidesattached to the surface of the reduced titanium powder, and the titanium powder is filtered out and then is washed, filtered and dried to obtain the low-oxygen titanium powder. According to the method, the oxygen content of the hydrogenation dehydrogenation titanium powder can be reduced to hundreds of ppm from thousands of ppm.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, and in particular provides a method for reducing the oxygen content of titanium powder prepared by hydrodehydrogenation. Background technique [0002] Titanium has excellent properties such as low density, high strength and corrosion resistance, and has been widely used in military and civilian fields such as aerospace, weapons and ships, mechanical vehicles, energy and environmental protection. The production and processing costs of titanium materials are high. The use of near net shape technology can improve the utilization rate of titanium materials and reduce production costs. It has obvious advantages in preparing high-performance parts with complex shapes and uniform structures. It is the most promising titanium processing at present. One of the crafts. [0003] Titanium powder is the raw material of the near-net shape process. At present, the main preparation methods of titanium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/14B22F9/02
CPCB22F9/14B22F9/023
Inventor 刘金涛欧东斌董永晖朱兴营周法
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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