Can be operated at low cost! A film that suppresses the oxidation and alteration of particles can be produced.
HVAF (High Velocity Air Fuel) is a thermal spraying method that burns hydrocarbon-based gas or liquid along with compressed air in a chamber, introducing powder into the resulting high-temperature, high-pressure gas flow to accelerate and heat the particles, which then collide and deposit onto the target material to form a coating. Compared to flame spraying and plasma spraying, its main features are high adhesion strength and minimal material alteration. 【Features】 ○ Lower maximum gas temperature ○ Wide range of gas selection ○ Can be operated at low cost ○ Ultra-high-speed jet frame at low temperatures For more details, please contact us or download the catalog.
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basic information
【Equipment】 ○ HVAF ○ Low-temperature HVAF ○ Central axis powder supply HVAF ○ Plasma spraying ● For more details, please contact us or download the catalog.
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Company information
SSS Co., Ltd. is a company specializing in contract processing of thermal spraying, primarily focusing on HVAF thermal spraying. HVAF uses combustion gases from kerosene and compressed air as the working gas. Because the combustion temperature is low, when spraying cermet (WC-based) materials primarily aimed at wear resistance, by using HVAF, by-products such as W2C, which typically occur with HVOF, do not form. If the temperature of HVAF can be lowered to the temperature range of cold spray or warm spray, it can reduce operating costs since it does not use industrial gases. However, liquid fuels have a narrower range for maintaining stable combustion compared to gaseous fuels, making it difficult with existing thermal spraying equipment. To address the above issues, we developed "Low-Temperature HVAF for Thermal Spraying" through joint research with Oshima National College of Maritime Technology. The working gas temperature can be adjusted between 450 and 800°C. Since we do not use industrial gases, we have a cost advantage. Additionally, there is a challenge in the stable supply of fine powders below several micrometers in dry spraying. To solve this problem, we are conducting joint research with Oita National College of Technology. Although practical application is still pending, a prototype has been completed, and it has reached a stage where it can be tested without issues in our in-house contract processing.
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