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Device and method for preparing spherical titanium powder and titanium alloy powder through gas atomization

A spherical titanium powder and gas atomization technology, applied in the powder metallurgy industry, can solve the problems of coarse particle size, low efficiency and poor continuity, and achieve the effects of controllable particle size, low impurity content and high sphericity

Active Publication Date: 2015-04-01
有研增材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can continuously prepare titanium and titanium alloy powders with fine particle size and high sphericity, but there are also obvious shortcomings, such as low efficiency, and the production of pure titanium powder is about 1Kg per hour.
And other atomization methods, such as the method for preparing titanium powder by unrestricted gas atomization invented by American Crucible Company (US4999051), have the shortcomings of coarse particle size and poor continuity.

Method used

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  • Device and method for preparing spherical titanium powder and titanium alloy powder through gas atomization

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preparation example Construction

[0040] The preparation method for preparing spherical titanium powder and titanium alloy powder by gas atomization of the present invention includes preparation processes such as wire feeding, high-frequency melting induction, atomization, droplet spheroidization, and cooling and solidification. The method includes the following specific steps:

[0041] (1) The titanium or titanium alloy wire / rod 5 is sent to the vacuum chamber 10 by the continuous feeder 1 through the dynamic sealing device 11, and after being straightened by the metal straightening mechanism 2 in the vacuum chamber 10, it is passed through the gas atomization nozzle 3 The guide device 9 in the central hole reaches the inside of the high-frequency melting coil 4, and the wire / rod material used can be pure titanium, Ti6Al4V and other traditional titanium materials for powder metallurgy, or new functional materials such as TiNiCuZr;

[0042] (2) Vacuumize the whole set of powder making device, including atomizat...

Embodiment 1

[0048] Firstly, pure titanium wire with a diameter of Ф2mm of the national standard TA1 grade is selected, and the titanium wire is straightened by a continuous feeding mechanism and then sent to the inside of the melting coil. Then vacuumize the whole set of equipment, and the vacuum degree reaches 1×10 -5 After Pa, use high-purity argon as the protective gas to recoil into the equipment, and the internal gas pressure of the equipment is 0.10MPa. Use a high-frequency power supply to heat and melt the titanium wire. The melting power is 20KW and the frequency is 500KHz. After the titanium wire is melted, the melt temperature exceeds the melting point of 200°C. After the titanium wire melts to form a stable liquid melt flow, it passes through the gas mist The atomizing nozzle atomizes the metal liquid flow to make powder. The atomization medium is high-purity argon, the atomization pressure is 4.0MPa, and the atomization gas flow rate is 90L / S. The melt droplets are broken, s...

Embodiment 2

[0050] Firstly, select Ti-6Al-4V titanium alloy wire with a diameter of Ф8mm, straighten the wire through a continuous feeding mechanism, and then send it to the inside of the melting coil. Then vacuumize the whole set of equipment, and the vacuum degree reaches 1×10 -4 After Pa, use high-purity argon as the protective gas to recoil into the equipment, and the internal gas pressure of the equipment is 0.1MPa. Use a high-frequency power supply to heat and melt the titanium wire. The melting power is 20KW and the frequency is 700KHz. After the titanium wire is melted, the melt temperature exceeds the melting point of 150°C. After the titanium wire melts to form a stable liquid melt flow, it passes through the gas mist The atomizing nozzle atomizes the metal liquid flow to make powder. The atomization medium is high-purity argon, the atomization pressure is 6.0MPa, and the atomization gas flow rate is 120L / S. The melt droplets are broken, spheroidized, cooled and solidified by ...

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Abstract

The invention relates to a device and method for preparing spherical titanium powder and titanium alloy powder through gas atomization, which belongs to the field of powder metallurgy industry. The device comprises a vacuum chamber, a continuous feeder for titanium or titanium alloy wires / rods is arranged outside the vacuum chamber, a dynamic sealing device is arranged at the top of the vacuum chamber, a metal straightening device is arranged inside the vacuum chamber, an atomizing chamber is arranged below the vacuum chamber, a gas atomization nozzle is installed between the atomizing chamber and the vacuum chamber, the center hole of the nozzle is internally provided with a wire / rod guiding device, a high-frequency smelting coil is installed below the nozzle, wherein the dynamic sealing device, the straightening device, the guiding device and the high-frequency smelting coil are installed on the same axis; a heat dissipation cover is installed inside the atomizing chamber, a protective cover is arranged at the top of the heat dissipation cover, and the centers of the heat dissipation cover and protective cover and the center of the high-frequency smelting coil are on the same axis; a powder collecting pot is arranged below the atomizing chamber. By means of controlling the diameters of the wires, the atomizing gas pressure and the power of a high-frequency power supply, titanium and titanium alloy powder with different particle sizes and particle size distributions can be obtained.

Description

technical field [0001] The invention relates to a device and method for preparing spherical titanium powder and titanium alloy powder by gas atomization, and belongs to the technical field of powder metallurgy industry. Background technique [0002] Titanium and titanium alloys have the advantages of low density, high specific strength and excellent corrosion resistance, and are widely used in military sectors such as aviation and aerospace, as well as civilian sectors such as chemical industry, metallurgy, light industry, and biomedicine. However, the processing and production process of titanium materials is complicated, the yield of finished products is low, and a large amount of residual titanium is produced in the production process. Using titanium to manufacture equipment or parts not only produces a large amount of residual titanium again, but also increases the manufacturing cost of titanium equipment and parts due to the difficulty of processing and welding, which c...

Claims

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Application Information

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IPC IPC(8): B22F9/08B01J2/04
Inventor 赵新明徐骏胡强盛艳伟赵文东贺会军朱学新张金辉金帅陆亮亮
Owner 有研增材技术有限公司
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