Hydrogen power metal solid deposition device and method

Abstract

The invention discloses a hydrogen power metal solid deposition device and method, and belongs to the technical field of metal solid deposition. The device comprises a material conveying system, a Laval nozzle and a hydrogen recovery system, the material conveying system comprises a powder feeder and a gas heater, and the powder feeder and the gas heater are both connected with an inlet of a Laval nozzle arranged in the closed spraying chamber. The hydrogen recovery system is connected with the closed spraying chamber and an inlet of the gas heater so that hydrogen can circulate under the closed condition. Sprayed hydrogen in the closed spraying chamber is recycled through the hydrogen recycling system and enters the gas heater to be heated, and then the hydrogen serves as accelerating gas to continue to accelerate micron-sized powder particles to be sprayed, so that the micron-sized powder particle accelerating effect and the collision deposition performance can be remarkably improved efficiently at low cost; and the oxygen content of the additive metal deposition body is reduced, and the mechanical, electrical and magnetic properties of the metal deposition body are greatly improved.

Description

technical field

[0001] The present invention relates to the technical field of metal solid state deposition, and in particular, to a hydrogen powered metal solid state deposition device and method. Background technique

[0002] As an emerging new surface treatment engineering technology, metal solid-state additive manufacturing is one of the important supplements to traditional thermal spraying technology. It is a spraying technology based on aerodynamic principles. The principle is to use high-pressure gas (nitrogen, helium) , air or mixed gas, etc.) carry metal powder particles into the high-speed airflow, and generate supersonic gas-solid two-phase flow through the scaling tube (Laval tube). The plastic deformation achieves the deposition of micron-sized powder particles.

[0003] At present, the industrially available processes that can significantly increase the particle collision speed usually use expensive helium (about 20-80 times that of air and nitrogen) as the ac...

Examples

Embodiment 1

[0072] This embodiment provides a hydrogen powered metal solid state deposition device, including a powder feeding hydrogen source 11, an accelerating hydrogen source 12, a powder feeding device 13, a gas heater 14, a first powder feeding tube 15, a second powder feeding tube 16, The first main gas pipe 17, the second main gas pipe 18, the powder preheating reaction chamber 2, the thermocouple, the pressure detector, the Rafal nozzle 3, the base body 4, the rotary table 5, the air pump 61, the filter 62, the compressor 63 , hydrogen storage tank 64, hydrogen detector 7, master control system and multiple pipes.

[0073] The outlet of the powder feeding hydrogen source 11 is connected to the inlet of the powder feeder 13 through the second powder feeding pipe 16 , and the outlet of the powder feeder 13 is connected to the inlet of the powder preheating reaction chamber 2 through the first powder feeding pipe 15 . The outlet of the accelerated hydrogen source 12 is connected to ...

Embodiment 2

[0080] This embodiment provides a hydrogen-powered metal solid-state deposition method, which is performed using the hydrogen-powered metal solid-state deposition device in Embodiment 1.

[0081] Specifically: when spraying, the powder-feeding hydrogen from the powder-feeding hydrogen source 11 enters the high-pressure powder feeder 13 through the second powder-feeding pipe 16, and carries the micron-sized powder particles to be sprayed in the powder feeder 13 through the first powder-feeding device. The tube 15 enters the powder preheating reaction chamber 2; the high-pressure hydrogen drawn from the accelerated hydrogen source 12 enters the gas heater 14 (tubular gas heater 14) through the second main gas pipe 18, and after heating, passes through the first main gas pipe 17 to the gas heater 14. In the powder preheating reaction chamber 2; at this time, the powdered hydrogen, accelerated hydrogen and powder particles in the powder preheated reaction chamber 2 are fully mixed,...

technical field

[0001] The present invention relates to the technical field of metal solid state deposition, and in particular, to a hydrogen powered metal solid state deposition device and method. Background technique

[0002] As an emerging new surface treatment engineering technology, metal solid-state additive manufacturing is one of the important supplements to traditional thermal spraying technology. It is a spraying technology based on aerodynamic principles. The principle is to use high-pressure gas (nitrogen, helium) , air or mixed gas, etc.) carry metal powder particles into the high-speed airflow, and generate supersonic gas-solid two-phase flow through the scaling tube (Laval tube). The plastic deformation achieves the deposition of micron-sized powder particles.

[0003] At present, the industrially available processes that can significantly increase the particle collision speed usually use expensive helium (about 20-80 times that of air and nitrogen) as the ac...

Examples

Embodiment 1

[0072] This embodiment provides a hydrogen powered metal solid state deposition device, including a powder feeding hydrogen source 11, an accelerating hydrogen source 12, a powder feeding device 13, a gas heater 14, a first powder feeding tube 15, a second powder feeding tube 16, The first main gas pipe 17, the second main gas pipe 18, the powder preheating reaction chamber 2, the thermocouple, the pressure detector, the Rafal nozzle 3, the base body 4, the rotary table 5, the air pump 61, the filter 62, the compressor 63 , hydrogen storage tank 64, hydrogen detector 7, master control system and multiple pipes.

[0073] The outlet of the powder feeding hydrogen source 11 is connected to the inlet of the powder feeder 13 through the second powder feeding pipe 16 , and the outlet of the powder feeder 13 is connected to the inlet of the powder preheating reaction chamber 2 through the first powder feeding pipe 15 . The outlet of the accelerated hydrogen source 12 is connected to ...

Embodiment 2

[0080] This embodiment provides a hydrogen-powered metal solid-state deposition method, which is performed using the hydrogen-powered metal solid-state deposition device in Embodiment 1.

[0081] Specifically: when spraying, the powder-feeding hydrogen from the powder-feeding hydrogen source 11 enters the high-pressure powder feeder 13 through the second powder-feeding pipe 16, and carries the micron-sized powder particles to be sprayed in the powder feeder 13 through the first powder-feeding device. The tube 15 enters the powder preheating reaction chamber 2; the high-pressure hydrogen drawn from the accelerated hydrogen source 12 enters the gas heater 14 (tubular gas heater 14) through the second main gas pipe 18, and after heating, passes through the first main gas pipe 17 to the gas heater 14. In the powder preheating reaction chamber 2; at this time, the powdered hydrogen, accelerated hydrogen and powder particles in the powder preheated reaction chamber 2 are fully mixed,...

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