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Metal powder degassing method and device

A metal powder and degassing device technology, which is applied in the field of powder metallurgy, can solve the problem of limited conduction of gas molecules, achieve low cost, simple equipment, and improve performance

Active Publication Date: 2017-10-10
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is often ineffective for degassing large quantities of powders due to the limited conduction of gas molecules through the interstices between the powders

Method used

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  • Metal powder degassing method and device
  • Metal powder degassing method and device
  • Metal powder degassing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Put the powder storage tank 1 on the degassing equipment box and connect it with the vacuum valve 2; 2) Close the powder inlet vacuum valve 2, open the powder outlet vacuum valve 8, turn on the vacuum pump 9 and the heating element 4, and close the airtight box 3) When the vacuum degree of the box is less than 0.01Pa, adjust the angle between the powder spreading plate and the horizontal plane to 15° through the control lever, and turn on the vibrator 3 , the vibration frequency is 100Hz; 4) Open the powder feeding vacuum valve 2, start powder feeding, the powder feeding rate is <80kg / h; 5) During the powder feeding process, if the vacuum degree is greater than 0.01Pa, reduce the powder feeding speed; 6) If The powder has a phenomenon of segregation, which can reduce the inclination angle of the powder spreading board and increase the vibration frequency to make the powder spread flat.

Embodiment 2

[0030] 1) Put the titanium alloy powder storage tank 1 on the degassing equipment box and connect it with the vacuum valve 2; 2) Close the powder inlet vacuum valve 2, open the powder outlet vacuum valve 8, turn on the vacuum pump 9 and the heating element 4, and The bag connected to the airtight box and the powder outlet vacuum valve 8 is degassed at a temperature of 550°C; 3) When the vacuum degree of the box is less than 0.01Pa, adjust the angle between the powder spreading plate and the horizontal plane to 12° through the control lever, and start the vibration 4) Open the powder feeding vacuum valve 2, start powder feeding, the powder feeding rate is 30kg / h; 5) During the powder feeding process, if the vacuum degree is greater than 0.01Pa, reduce the powder feeding rate; 6) If The powder has a phenomenon of segregation, which can reduce the inclination angle of the powder spreading board and increase the vibration frequency to make the powder spread flat.

Embodiment 3

[0032] 1) Place the superalloy powder storage tank 1 on the degassing equipment box and connect it with the vacuum valve 2; 2) Close the powder inlet vacuum valve 2, open the powder outlet vacuum valve 8, and turn on the vacuum pump 9 and the heating element 4, and The bag connected to the airtight box and the powder outlet vacuum valve 8 is degassed at a temperature of 400°C; 3) When the vacuum degree of the box is less than 0.01Pa, adjust the angle between the powder spreading plate and the horizontal plane to 8° through the control lever, and start the vibration 4) Open the powder feeding vacuum valve 2, start powder feeding, the powder feeding rate is 60kg / h; 5) During the powder feeding process, if the vacuum degree is greater than 0.01Pa, reduce the powder feeding rate; 6) If The powder has a phenomenon of segregation, which can reduce the inclination angle of the powder spreading board and increase the vibration frequency to make the powder spread flat.

[0033] The deg...

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Abstract

A metal powder degassing method comprises the following steps: (1) closing a powder feeding vacuum valve, opening a powder discharging vacuum valve, opening a vacuum pump and a heating body, and degassing a sheath connected between an enclosed tank body and the powder discharging vacuum valve at the temperature lower than 600 DEG C; (2) when the vacuum degree of the enclosed tank body is lower than 0.01 Pa, adjusting the inclination angle of each powder spreading plate to 8-15 degrees through a control rod, wherein the vibration frequency is 50-100 Hz; (3) opening the powder feeding vacuum valve, wherein the powder dropping rate is lower than 80 kg / h; (4) in the powder dropping process, reducing the powder dropping rate if the vacuum degree is higher than 0.01 Pa; and (5) if the segregation of powder occurs, reducing the inclination angle of each powder spreading plate, improving the vibration frequency, and spreading the powder. A metal powder degassing device comprises a series of powder spreading plates, wherein the powder spreading plates are connected with the side wall of the enclosed tank body through hinges and connected with the control rod through sliding supports, thereby forming a folded-line path for the powder flow; through the control rod, the inclination angle of each powder spreading plate can be controlled and the vibrations can be transferred; and the gas adsorbed in the gaps among powder particles and on the surfaces of the powder particles can be effectively removed, thereby remarkably improving the part manufacturing performance after powder consolidation.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a metal powder degassing method and a device thereof, which can effectively remove the gas adsorbed in the gaps between powder particles and the surface before the powder is consolidated, and significantly improve the performance of the product after the powder is consolidated. Background technique [0002] Under different powder preparation and processing processes, a certain amount of gas remains between the metal powder particles and on the powder surface. These gases are generally N 2 , O 2 、H 2 O, H 2 , Ar, He, etc. If these gases are not removed before powder consolidation, the more reactive gas N 2 , O 2 、H 2 O, H 2 etc. will chemically interact with the surface of the powder particles during the thermal consolidation process, forming a serious primary particle boundary (Prior Particle Boundry, PPB) in the alloy after consolidation, and inert ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00
CPCB22F2999/00B22F1/14B22F2201/20
Inventor 瞿宗宏韩志宇王庆相梁书锦张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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