Pulverizing and cooling device and method

A cooling device and powder cavity technology, applied in the field of metal alloys, can solve the problems of increasing the floor space, increasing the processing cost, strengthening powder cooling, etc., and achieving the effects of slowing down the flight speed, enhancing heat exchange, and reducing bonding

Active Publication Date: 2022-02-15
西安赛隆增材技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In related technologies, one is to increase the diameter of the powder-making chamber to ensure that the powder has sufficient cooling time during flight. However, for powders that are easy to stick to the wall, such as titanium alloy powder, the diameter of the powder-making chamber needs to be designed to 3~5m , the diameter of the pulverizing chamber greatly increases the processing cost, increases the floor area, and increases the maintenance cost of cleaning the furnace during use
The other is to quickly replace the high-temperature gas in the powder-making chamber to reduce the gas temperature in the powder-making chamber and

Method used

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  • Pulverizing and cooling device and method
  • Pulverizing and cooling device and method
  • Pulverizing and cooling device and method

Examples

Experimental program
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Effect test

Example Embodiment

[0086] Implementation example one

[0087] Preparation of TC4 powder

[0088] According to TC4 bar stock length 300mm, diameter 50mm, working speed 40000rpm, so TC4 bar stock line speed is approx. , when the droplet leaves the TC4 bar, it is consistent with the linear velocity of the TC4 bar, and the linear velocity of the droplet is , TC4 powder density 4.51g / cm 3 , the diameter of the milling chamber is 100 , the interior is filled with argon, and the gas density 1.63kg / m 3 , viscosity for , the circular nozzle 400 has a radius of 0.01 m, is facing the center, and has a deflection angle of 0. The closed annular surface 1000 just formed at the boundary of the initial section has 87 nozzles 400, and the bottom of the pulverizing chamber 100 is a metal powder collection device, so no nozzles 400 are provided there.

[0089] According to the formula (4), the speed at which the TC4 powder reaches the edge of the milling chamber 100 is obtained .

[0090] Accord...

Example Embodiment

[0094] Implementation example two

[0095] Preparation of Zr2.5Nb powder

[0096] According to Zr2.5Nb bar length 300mm, diameter 50mm, working speed 35000rpm, so Zr2.5Nb bar line speed is about , the velocity when the droplet leaves the Zr2.5Nb rod , Zr2.5Nb powder density 5.89g / cm 3 , the diameter of the milling chamber is 100 , the interior is filled with argon, and the gas density 1.63kg / m 3 , viscosity for , the circular nozzle 400 has a radius of 0.01 m, is facing the center, and has a deflection angle of 0. In the closed annular surface 1000 just formed at the boundary of the initial section, the number of nozzles 400 is 87, and the bottom of the pulverizing chamber 100 is a Zr2.5Nb powder collection device, so no nozzles 400 are provided here.

[0097] The speed at which the Zr2.5Nb powder reaches the edge of the powder-making chamber 100 is obtained according to formula (4) .

[0098] According to the formula (5), the time for the Zr2.5Nb powder to ...

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Abstract

The embodiment of the invention relates to a pulverizing and cooling device. The pulverization cooling device comprises a pulverizing chamber; an inert atmosphere unit communicating with the pulverizing chamber; and multiple nozzles, wherein each nozzle is arranged on the inner wall of the powder preparing cavity, communicates with the inert atmosphere unit and is used for spraying inert protective gas into the powder preparing cavity. According to the embodiment of the invention, the inert protective gas sprayed out of the nozzles can form the hedging cooling airflow for the liquid drops leaving the metal bar to form the metal powder, and the metal powder is further cooled, so that the flying speed of the metal powder is greatly reduced, the time for the metal powder to reach the inner wall of the pulverizing chamber is prolonged. Heat exchange of the metal powder in all flying directions is enhanced, and the metal powder which is not completely solidified is prevented from being bonded on the inner wall of the powder preparing cavity.

Description

technical field [0001] Embodiments of the present disclosure relate to the technical field of metal alloys, and in particular, to a powder-making cooling device and method. Background technique [0002] Plasma rotating electrode technology is an important technical means to prepare high-quality metal powder. The basic principle is that the plasma gun melts the front end of the high-speed rotating bar into a liquid film. Under the action of centrifugal force, the liquid film throws out the liquid line and forms a small droplet. The droplets are spherical under the action of surface tension, and solidify into powder during flight, but the powder is not cooled enough in the small-diameter powder-making chamber to bond with each other to form satellite powder or stick to the powder-making chamber Indoor walls form lumpy powder. [0003] In related technologies, one is to increase the diameter of the powder-making chamber to ensure that the powder has sufficient cooling time du...

Claims

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Application Information

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IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/0844B22F2009/0876B22F2009/088B22F2009/0892
Inventor 孙念光康鑫王强陈斌科向长淑朱纪磊王浩王超
Owner 西安赛隆增材技术股份有限公司
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