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HVOF Supersonic Flame Process
Release time:
2020-08-30 22:15
Source:
HVOF Supersonic Flame Process
Supersonic Flame Spraying: Oxygen and aviation kerosene are combusted in a high-pressure combustion chamber via a premixing system. The flame jet generated during combustion, combined with high-pressure air passing through a Laval nozzle, produces a high-temperature, high-velocity flame stream. This flame stream heats metal-ceramic powders to a semi-molten state and propels the partially molten powder onto the substrate surface at a velocity of 2000 m/s, thereby forming a high-quality, wear-resistant coating with excellent bonding strength and density.
The primary coating material used in supersonic flame spraying is WC-Co metal ceramic. The bonding strength and density of supersonic flame-sprayed coatings are higher than those of arc-sprayed coatings. Consequently, the resulting coatings exhibit superior wear resistance. Moreover, since the workpiece temperature during spraying remains below 20°C, no thermal distortion occurs in the workpiece.
The primary coatings used in supersonic flame spraying include tungsten carbide coatings, nickel-chromium-chromium carbide coatings, cobalt-based alloy coatings, nickel-chromium-tungsten carbide coatings, and various cemented carbide coatings.
The hardness of supersonic flame spraying is controllable within the range of HRC 50–70.
Bond strength between the supersonic flame-sprayed coating and the substrate: ≥80 MPa.
High-temperature resistance of supersonic flame-sprayed coatings: controllable between 600℃ and 1200℃.
Wear resistance of supersonic flame-sprayed coatings: It is 10 to 40 times that of 20# steel.
Characteristics of supersonic flame: The spraying temperature is below 120℃, and no thermal deformation occurs.
Relevant Information
The complete set of plasma-sprayed equipment has been shipped to the customer’s site in Thailand.
Core spraying equipment: SX-80 plasma spray main unit, with a 15,000℃ flame suitable for multiple materials including zirconia and silicon carbide; powder feeding accuracy of ±1%, and coating thickness tolerance ≤ ±5 μm. Environmental protection support system: Customized soundproof booth + pulse dust collector—effectively addressing spray noise pollution while achieving highly efficient dust recovery, compliant with Thai environmental standards. Automated equipment: 6-axis industrial robot + intelligent spray cart, enabling precise spraying of complex workpieces and automated loading/unloading, boosting production efficiency by 40%.
On-site engineers provide hands-on training, focusing on the core operations of plasma spraying equipment such as the SX-80. Sanxin has customized a complete solution for its customers, including an automated spraying robotic arm, a soundproof booth, and a dust removal system—ensuring both high spraying efficiency and compliance with environmental standards.
Guangzhou Sanxin Thermal Spraying Turntable Shipment
Guangzhou Sanxin Company manufactures single-station and multi-station thermal spray turntables, which can be paired with plasma equipment, supersonic equipment, and arc equipment. We offer rapid, customized production tailored to customer requirements and product dimensions. A thermal spray turntable is a high-precision rotary worktable specifically designed for thermal spraying processes—including flame spraying, plasma spraying, and arc spraying. By providing controllable rotational speed and exceptional stability, it ensures uniform coating thickness on the workpiece surface, thereby enhancing spraying efficiency and quality.
SX-80 plasma equipment is being used at a customer site in Russia.
SX-80 plasma equipment is being used at a customer site in Russia.
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