A method and device for degassing metal powder

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

Active Publication Date: 2019-11-19
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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  • A method and device for degassing metal powder
  • A method and device for degassing metal powder
  • A method and device for degassing metal powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Place the powder storage tank 1 on the box of the degassing equipment and connect it to 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, The casing connected to the powder discharge vacuum valve 8 is degassed at a temperature of 580℃; 3) When the vacuum degree of the cabinet is less than 0.01Pa, adjust the angle between the powder spreading plate and the horizontal plane to 15° through the control rod, and turn on the vibrator 3. , The vibration frequency is 100Hz; 4) Open the powder inlet vacuum valve 2 to start powder feeding, and the powder feeding rate <80kg / h; 5) During the powdering process, if the vacuum degree is greater than 0.01Pa, reduce the powdering rate; 6) If the powder has segregation, reduce the inclination angle of the powder spreader and increase the vibration frequency to make the powder flat shop.

Embodiment 2

[0030] 1) Place the titanium alloy powder storage tank 1 on the box of the degassing equipment and connect it to 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, right The envelope connected to the closed box and the powder discharge vacuum valve 8 is degassed at a temperature of 550°C; 3) When the vacuum of the box is less than 0.01Pa, adjust the angle between the powder spreading board and the horizontal plane to 12° through the control lever, and start the vibration The vibration frequency is 80Hz; 4) Open the powder inlet vacuum valve 2, and start powder feeding, the powder feeding rate is 30kg / h; 5) During the powder feeding process, if the vacuum degree is greater than 0.01 Pa, reduce the powder feeding rate; 6) If The powder has segregation phenomenon, which can reduce the inclination of the powder spreading board and increase the vibration frequency to make the powder...

Embodiment 3

[0032] 1) Place the superalloy powder storage tank 1 on the box of the degassing equipment and connect it to the vacuum valve 2; 2) Close the powder inlet vacuum valve 2, open the powder outlet vacuum valve 8, open the vacuum pump 9 and the heating element 4, right The envelope connected to the closed box and the powder discharge vacuum valve 8 is degassed, and the temperature is 400℃; 3) When the vacuum of the box is less than 0.01Pa, adjust the angle between the powder spreading board and the horizontal plane to 8° through the control lever, and start the vibration The vibration frequency is 50Hz; 4) Open the powder inlet vacuum valve 2, and start powder feeding at a powder feeding rate of 60kg / h; 5) During the powder feeding process, if the vacuum is greater than 0.01 Pa, reduce the powder feeding rate; 6) If The powder has segregation phenomenon, which can reduce the inclination of the powder spreading board and increase the vibration frequency to make the powder spread even...

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Abstract

A method for degassing metal powder, comprising the following steps: 1) closing a powder inlet vacuum valve, opening a powder outlet vacuum valve, opening a vacuum pump and a heating element, and degassing a sheath connected to a closed box body and a powder outlet vacuum valve, and the temperature <600°C; 2) When the vacuum degree of the closed box is less than 0.01Pa, adjust the inclination angle of the powder spreading plate to 8~15° by the control lever, and the vibration frequency is 50~100Hz; 3) Open the powder inlet vacuum valve, and the powder feeding rate is < 80kg / h; 4) During the powder feeding process, if the vacuum degree is greater than 0.01Pa, reduce the powder feeding rate; 5) If the powder is segregated, reduce the inclination angle of the powder spreading plate, increase the vibration frequency, and make the powder flat; The metal powder degassing device includes: a series of inclined powder spreading boards are connected to the side wall of the box through hinges, and connected to the control rod through sliding struts to form a broken line path for powder flow; the control rod can control the inclination angle of the powder spreading board and transfer Vibration: It can effectively remove the gas adsorbed on the powder particle gap and surface, and significantly improve the performance of the product after powder consolidation.

Description

Technical field [0001] The invention belongs to the technical field of powder metallurgy, and specifically relates to a metal powder degassing method and a device thereof, which effectively remove the gas adsorbed on the powder particle gap 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 treatment processes, a certain amount of gas remains between metal powder particles and on the surface of the powder. These gases are generally N 2 , O 2 , H 2 O, H 2 , Ar, He, etc. If these gases are not removed before the powder is consolidated, the more active gas N 2 , O 2 , H 2 O, H 2 It will chemically interact with the surface of the powder particles during the thermal consolidation process, forming a more serious original particle boundary (Prior Particle Boundry, PPB) in the alloy after the consolidation, and inert gases such a...

Claims

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Application Information

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Patent Type & Authority Patents(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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