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Ultrasonic atomization device and method for preparing spherical metal powder

An ultrasonic atomization and metal technology is applied in the field of ultrasonic atomization device and the preparation of spherical metal powder. Active metal and air contact reaction, good fluidity effect

Active Publication Date: 2021-11-19
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above three ultrasonic atomization devices, the ultrasonic tool head will be in direct or indirect contact with the molten metal, and cavitation corrosion will occur. The powder device is often not suitable for atomizing metal materials with strong atomization activity or high melting point, and it is difficult to obtain spherical metal powder with fine particle size, narrow particle size distribution, high sphericity and good fluidity

Method used

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  • Ultrasonic atomization device and method for preparing spherical metal powder
  • Ultrasonic atomization device and method for preparing spherical metal powder
  • Ultrasonic atomization device and method for preparing spherical metal powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] 17-4 stainless steel is selected as the metal base material, laser melting is adopted (the heat source generator is a YAG laser), the laser energy is 20kW, the laser frequency is 20kHz, the laser spot diameter is 100μm, and the metal base material bar (diameter is 40mm) is set by The conveying system with rollers conveys, and the feeding speed of the metal base material is 30mm / min; through the vacuum channel, ultrasonic atomization is used to prepare spherical metal powder. Gas nitrogen to a pressure of 0.1MPa, the flow rate of nitrogen in the spray chamber is kept at 20m 3 / min, the heat source starts to work to melt the metal base metal bar, the material of the horn is No. Atomize under the action of vibration, and collect the prepared spherical metal powder in the powder collector.

[0079] The spherical metal powder of embodiment 1 gained is carried out scanning electron microscope observation, gained SEM figure is shown in Figure 4 . Depend on Figure 4 It can...

Embodiment 2

[0083] 304 stainless steel is selected as the metal base material, laser melting is adopted (the heat source generator is a YAG laser), the laser energy is 20kW, the laser frequency is 20kHz, the laser spot diameter is 100μm, and the metal base material bar (diameter is 40mm) is provided by a roller The conveying system conveys, the feeding speed of the metal base material is 30mm / min; the chamber of the spherical metal powder device is vacuumed to a pressure of 0.1Pa by ultrasonic atomization through the vacuum channel, and then the inert gas nitrogen is filled into the chamber through the inert gas channel Up to a pressure of 0.1MPa, the flow rate of nitrogen in the atomization chamber is kept at 20m 3 / min, the heat source starts to work to melt the metal base bar, the material of the horn is No. Atomize under the action of vibration, and collect the prepared spherical metal powder in the powder collector.

[0084] The spherical metal powder of embodiment 2 gained is carri...

Embodiment 3

[0088] GH4169 nickel-based superalloy is selected as the metal base material, laser melting is adopted (the heat source generator is a YAG laser), the laser energy is 20kW, the laser frequency is 20kHz, the laser spot diameter is 100μm, and the metal base material bar (diameter is 25mm) is made of The transmission system is equipped with rollers, and the feeding speed of the metal base material is 50mm / min; through the vacuum channel, the ultrasonic atomization is used to prepare the spherical metal powder. Inert gas nitrogen to a pressure of 0.1MPa, the flow rate of nitrogen in the spray chamber is kept at 20m 3 / min, the heat source starts to work to melt the metal base bar, the material of the horn is No. Atomize under the action of vibration, and collect the prepared spherical metal powder in the powder collector.

[0089] The spherical metal powder of embodiment 3 gained is carried out scanning electron microscope observation, gained SEM figure is shown in Figure 8 . ...

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Abstract

The invention belongs to the technical field of spherical metal powder preparation, and particularly relates to an ultrasonic atomization device and a method for preparing spherical metal powder. The ultrasonic atomization device comprises an ultrasonic vibration system (1), a gear rack system (2) and an atomization system (3), wherein the ultrasonic vibration system (1) comprises a transducer (1-1) and an amplitude-change pole (1-2) which are fixedly connected; the atomization system (3) comprises a fuse wire system (3-1) and an atomization chamber (3-2) positioned below the fuse wire system (3-1); a mesh sieve (3-2-1) is arranged in the atomization chamber (3-2); the amplitude-change pole (1-2) is meshed with the gear rack system (2); and the gear rack system (2) is meshed with the atomization chamber (3-2). According to the device, the amplitude-change pole does not make contact with molten metal, and cavitation corrosion does not exist.

Description

technical field [0001] The invention belongs to the technical field of spherical metal powder preparation, and in particular relates to an ultrasonic atomization device and a method for preparing spherical metal powder. Background technique [0002] Metal powder is small in size and has many types, suitable for various processing methods. As a raw material, it is widely used in powder metallurgy, spray coating, electronics and chemical industries. At present, metal powders include various materials such as cobalt-chromium alloy, stainless steel, aluminum alloy, bronze alloy, titanium alloy and nickel-based alloy. In addition to good plasticity, the powder used in metal 3D printing must also meet the requirements of fine particle size, narrow particle size distribution, high sphericity and good fluidity. [0003] At present, the main methods for preparing metal powder are: mechanical pulverization, rotary atomization, gas atomization, spheroidization, etc., but the particle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/0832
Inventor 任忠鸣陈超越王江帅三三殷宇豪
Owner SHANGHAI UNIV
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