HVOF supersonic flame spraying equipment is a high-end thermal spraying solution developed by Lijia , which is specially designed to provide dense and high bonding strength functional coatings for industrial key components. Through supersonic particle acceleration and precise combustion control, this technology forms wear-resistant, anti-corrosion or thermal protective coating with porosity less than 1% and bonding strength ≥ 70 MPa on the substrate surface, which is widely used in aerospace, energy equipment, oil and gas, heavy machinery and other fields. As the leading enterprise of thermal spraying technology in China, Zhengzhou Lijia integrates fuel optimization, nozzle design, automatic control and other core technologies into HVOF equipment by virtue of decades of technical accumulation and independent innovation, so as to ensure that the coating performance meets international standards, while taking into account energy efficiency and cost efficiency.
The core of HVOF technology is its supersonic gas flow generation and powder acceleration mechanisms. The facility generates supersonic flame flow at speeds in excess of 2000 m/s in the combustion chamber by accurately mixing oxygen with liquid/gaseous fuel. The powder material is injected into the flame center through the axial powder feeding system, and after being heated and accelerated, it impacts the base with extremely high kinetic energy to form a coating close to the theoretical density. In addition, its wide range of material compatibility covers cemented carbide, cermet, and superalloy, which can be customized for abrasion, corrosion, or thermal insulation coatings.
The HVOF equipment of Zhengzhou Lijia adopts the modular design, and the fuel system adopts the aviation kerosene - oxygen combination scheme, combined with the high-precision flow control valve, to realize the combustion stability and energy efficiency balance, reducing the operation cost by 15-20% compared with the traditional gas HVOF system. The equipment integrates a six-axis mechanical arm and a CNC turntable, which can automatically complete the uniform coating of complex geometric workpieces. The repeated positioning accuracy reaches ± 0.05 mm, meeting the requirements of high-precision industrial scenes.
To ensure equipment reliability and coating quality, Zhengzhou Lijia implements strict whole-process quality control system. Each HVOF equipment has passed metallographic microanalysis, adhesion test and wear simulation test before delivery. The equipment conforms to CE certification standards, and provides 24-month warranty and lifetime technical support to assist customers in optimizing spraying parameters and troubleshooting. Zhengzhou Lijia provides customized HVOF solutions to further consolidate its technical leadership in the field of high-performance coating equipment.
