Supersonic Arc Spraying Process

Supersonic Arc Spraying Process: In supersonic arc spraying, two continuously and uniformly fed wire electrodes are connected to the positive and negative terminals of a power supply. At the instant when the ends of the wires briefly touch and an arc is struck, the arc sustains stable combustion under the influence of the electric current. Behind the arc’s point of origin, the airflow—accelerated through a Laval nozzle to reach supersonic speeds—carries away the wire material melted by the arc, atomizing it into fine particles. Under the action of this supersonic airflow, the particles are sprayed onto a pre-treated substrate surface, forming a coating. Supersonic arc spraying is a continuously repeated process of melting, atomization, and deposition. Because the atomized particles are small, uniform, and travel at high velocities, this process enables the production of high-quality coatings. Supersonic arc spraying employs a Laval nozzle to increase the airflow velocity from subsonic to supersonic levels, thereby enhancing the acceleration effect on the particles and boosting their flight speed. The velocity of the particles significantly influences the performance of the coating: higher particle velocities result in stronger impact forces upon deposition onto the substrate, leading to more thorough particle deformation. This promotes robust bonding between particles and the substrate as well as among particles themselves, greatly improving both the adhesion strength and cohesive strength of the coating and reducing its porosity. Coatings produced via supersonic arc spraying include large-area zinc coatings, aluminum coatings, copper coatings, stainless steel coatings, various wear-resistant boiler coatings, and flue gas duct wear-resistant coatings. The bond strength between the supersonic arc-sprayed coating and the substrate is ≥80 MPa. The high-temperature resistance of supersonic arc-sprayed coatings can be precisely controlled within the range of 600–1200°C. Key features of supersonic arc spraying include: a spraying temperature below 120°C, which prevents thermal distortion. We have accumulated extensive experience in coating applications across materials, equipment, processes, and solutions—and we’re now replicating these successful cases. We’ll guide you through the entire coating manufacturing transformation process, ensuring: rapid production start-up; a reliable, turnkey supply solution covering materials, equipment, and processes; coating trials conducted either on-site at your facility or at our technical center; and consistently high coating quality and efficiency. Start collaborating with us today and reap success tomorrow!

Category:

Industry Application Classification

Military and defense industry

Key words :

涂层

电弧

喷涂

超音速

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Product Description

Supersonic Arc Spraying Process:

Supersonic Arc Spraying: Two wire feeders, continuously and uniformly fed into the system, are connected to the positive and negative terminals of the power supply, respectively. At the instant when the ends of the wires briefly touch, an arc is initiated and maintained steadily under the influence of the electric current. Behind the arc’s point of origin, the airflow—accelerated through a Laval nozzle to reach supersonic speeds—carries away the wire material melted by the arc, atomizing it into fine particles. Under the action of this supersonic airflow, the particles are sprayed onto the pre-treated substrate surface, forming a coating.
Supersonic arc spraying is a process that repeatedly involves melting, atomization, and deposition. Because the atomized particles are fine, uniform, and high in velocity, it enables the production of high-quality coatings.
Supersonic arc spraying utilizes a Laval nozzle to increase the airflow velocity from subsonic to supersonic, thereby enhancing the acceleration effect of the airflow on the particles and boosting their flight speed. The velocity of the particles significantly influences the performance of the coating: the higher the particle velocity, the stronger the impact force upon deposition onto the substrate, leading to more thorough particle deformation. This, in turn, promotes robust bonding between particles and the substrate as well as among particles themselves, greatly improving both the adhesion strength and cohesive strength of the coating and reducing its porosity.
Coatings produced by supersonic arc spraying: large-area zinc coatings, aluminum coatings, copper coatings, stainless steel coatings, various wear-resistant coatings for boilers, and wear-resistant coatings for flue ducts.
Bonding strength between the supersonic arc-sprayed coating and the substrate: ≥80 MPa.
High-temperature resistance of supersonic arc-sprayed coatings: controllable between 600 and 1200℃.
Characteristics of supersonic arc spraying: The spraying temperature is below 120℃, which prevents thermal deformation.

Materials - Equipment - Processes - Solutions

We have accumulated extensive experience in coating applications, and we are now replicating these successful case studies. We’ll guide you through the entire coating manufacturing transformation process, ensuring: rapid production start-up; a reliable supply solution that covers everything—from materials and equipment to processes; coating trials conducted either at your site or at our technology center; and consistently high coating quality and efficiency. Start collaborating with us today and reap success tomorrow!

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