Air-fuel type supersonic flame spray gun, spraying device and method for preparing cermet coating

A technology of supersonic flame and spraying device, which is applied in metal material coating process, coating, molten spraying, etc., which can solve the problems affecting spraying stability, broken ceramic pieces, ablation and plugging holes, etc., and can improve the service life and stability, particle speed increase, and the effect of avoiding peeling

Active Publication Date: 2022-07-08
MIN OF WATER RESOURCES HANGZHOU MACHINERY DESIGN INST
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, conventional atmospheric air supersonic flame spray guns use porous ceramic sheets to mix and activate gas and air, and do not effectively cool them. During use, it is easy to cause the ceramic sheets to break and ablate and block holes. Affect the stability of spraying and become a safety hazard

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Air-fuel type supersonic flame spray gun, spraying device and method for preparing cermet coating
  • Air-fuel type supersonic flame spray gun, spraying device and method for preparing cermet coating
  • Air-fuel type supersonic flame spray gun, spraying device and method for preparing cermet coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0030] figure 1 Shown is a preferred implementation case of the novel air-fuel type supersonic flame spray gun of the present invention, but it is not limited to this. like figure 1 As shown, it includes a combustion chamber 8, a barrel 10 and a coaxial tailstock 3 coaxially arranged at the front and rear ends of the combustion chamber 8; the combustion chamber 8 and the coaxial tailstock 3 are provided with a combustion chamber casing 5 , the rear end of the combustion chamber housing 5 is fixedly connected with the rear end of the coaxial tailstock 3; the barrel 10 is provided with a barrel housing 11, and the barrel housing 11 is connected to the combustion chamber housing 5 is connected to form a cavity for high-pressure air movement; the combustion chamber shell 5 is provided with a high-pressure air inlet 9 and an ignition needle 7, an...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
microhardnessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses an air-fuel type supersonic flame spray gun, a spraying device and a method for preparing a metal ceramic coating. The air-fuel type supersonic flame spray gun comprises a combustion chamber, a barrel and a coaxial tailstock coaxially arranged at the front and rear of the combustion chamber; a combustion chamber casing is arranged outside the combustion chamber and the coaxial tailstock; There is a barrel casing, which is communicated with the combustion chamber casing; the combustion chamber casing is provided with a high-pressure air inlet and an ignition needle; high-pressure air distribution holes are distributed on the coaxial tailstock; A cooling air outlet; a catalytic copper plate is arranged between the coaxial tailstock and the combustion chamber. The air-fuel type supersonic flame spray gun of the invention achieves a great reduction in flame temperature and a great increase in particle velocity, the flame temperature at the outlet of the spray gun is lower than 1600 DEG C, the particle velocity reaches 1200 m / s, and the preparation of high-performance amorphous coatings is realized. . The WC-10Co4Cr cermet coating obtained by the invention can effectively avoid the peeling of the coating and has good corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of supersonic flame spraying, and in particular relates to a novel air-fuel type supersonic flame spray gun, a spraying device and a method for preparing a cermet coating. Background technique [0002] The traditional gas-oxygen supersonic thermal spraying technology provides the energy for powder heating and acceleration through the combustion of gas and oxygen. The flame temperature at the spray gun outlet is above 2800°C, and the powder particle velocity is 700-900m / s. The disadvantages of long residence time in the flow, etc., will lead to serious oxidation of powder particles and reduce the coating performance, and the lower particle velocity will also cause problems such as coating density and low bonding strength. For powders such as amorphous, this technology cannot retain the amorphous state of the coating because the flame temperature is too high, which cannot meet the needs of use. [0003] The c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): C23C4/129C23C4/06
CPCC23C4/129C23C4/06Y02E20/34
Inventor陈小明赵坚刘伟毛鹏展刘德有方勇伏利张凯张磊
OwnerMIN OF WATER RESOURCES HANGZHOU MACHINERY DESIGN INST