Recently, China has accelerated the pace of equipment development and production, and has formed a complete development and production system. More than 20 units have been engaged in the development and production of thermal spraying equipment, which can produce various types of oxyacetylene flame spraying equipment and spray melting equipment; New arc spraying equipment; Complete plasma spraying equipment and spray welding equipment; Various special machine tools; Thermal spraying air purification equipment, pre-treatment and post-processing equipment. There are more than 100 single machine varieties. The development and production of these products have ensured the development of thermal spraying technology. The outstanding ones are:
1. High speed flame spraying device
At present, the high-speed flame spraying equipment (hvof), (hvaf) and supersonic plasma spraying equipment introduced from abroad are characterized by high particle flight speed, high bonding strength between coating and substrate, and low porosity. These equipment have played an important role in aerospace, aviation, metallurgy, chemical industry, power and other industries. However, the above imported equipment is expensive, and the fuel (propane, propylene) is not easy to be popularized. In view of the above situation and in combination with China's national conditions, Sichuan Changcheng Spray Technology Research Institute has successfully developed a high-speed spray gun with oxyacetylene flame as the heat source. Due to the limitation of acetylene pressure, although the particle flight speed cannot reach supersonic speed at present, it is 4-5 times higher than that of conventional oxyacetylene flame powder spraying, and 1-2 times higher than that of atmospheric pressure plasma spraying. The metal and alloy powder materials that can be sprayed include Al2O3-TiO2-CO-WC, polyethylene, nylon and other thermoplastic powder materials. In addition, Xi'an Jiaotong University and other units have successfully developed a high-speed flame (hvof) spraying device and started to apply it.
2. High speed arc spraying device
As arc spraying has the advantages of high bonding strength, low energy consumption, low cost, etc., in recent years, this kind of equipment has been paid more and more attention in China and actively adopted, especially in the large-area long-term protection project of steel structures and the thermal corrosion of power plant boiler pipes. On the basis of ordinary arc spraying, the Armored Corps Engineering College of the National Industry University Research Equipment Engineering Center and the Xi'an Second Artillery Corps Engineering College recently developed a high-speed arc spraying gun with an air velocity of more than 600m/s. Its coating bonding strength, porosity and other indicators are better than ordinary arc spraying, and are currently being further promoted and applied.
3. Oxygen acetylene flame metal powder spraying device
The oxyacetylene flame metal powder spraying technology has been widely promoted and applied in China at present, and almost all large enterprises regard it as a means of repairing the old and recycling the waste. Shanghai, Jiangsu, Wuhan, Sichuan and other places have developed and produced various types of spraying and spray welding guns, which have been widely used by spraying units. Shanghai Welding, Cutting and Spraying Machinery Factory has recently improved the original qht-7/h flame spray gun by using two sets of nozzles and two heat sources: oxygen acetylene flame and oxygen liquefied petroleum gas (household bottle). The use of bottled liquefied petroleum gas as combustible gas can greatly reduce the cost and bring greater convenience to the spraying operation.
4. Gas deflagration spraying device
The 621 Research Institute of China National Aerospace Corporation has been developing since the 1960s, and has now installed a complete set of gas explosion spraying device, which has sprayed many high-density high-quality coatings for aerospace, aviation and other military industries. The equipment has reached or approached the level of similar products abroad. In recent years, Beijing Great Wall Titanium Co., Ltd. has cooperated with Ukraine to establish a Sino foreign joint venture Beijing TIDE New Material Co., Ltd., and has introduced the manufacturing technology of explosive spraying equipment from Ukraine. Now it can produce explosive spraying equipment for computer controlled three-dimensional walking mechanism. In addition to domestic use, it has been sold to the United States, Taiwan and other regions.
5. Oxygen acetylene flame plastic powder spraying device
In recent years, a flat and smooth plastic coating can be obtained by using oxygen acetylene flame, boiling powder feeding method and special spray gun to spray plastic powder. This provides a new method for painting plastic coatings on large workpieces, various storage tanks and pipelines. For this reason, Shenyang Thermal Spraying Factory, Wuhan Material Protection Research Institute, Armored Corps Engineering College, etc. have successively developed different types of flame plastic powder spraying devices, and carried out large-scale construction, and received good results. Among them, the performance of fsp - ⅱ plastic powder flame spray gun successfully developed by Wuhan Research Institute of Material Protection has reached the level of utp's i-spray jet spray gun.
6. New Plasma Spray Gun
Tsinghua University and other units have successfully developed the qzni high-energy internal hole plasma spray gun, which has a power of 75 kw, and its thermal efficiency, average enthalpy of plasma jet, jet temperature, gun power and powder deposition rate all reach the level of metco large internal hole spray gun. Recently, Beijing EntroKeer Applied Technology Research Institute has successfully developed bt-g1, bt-g2, bt-g3 new plasma spray guns, and bt-ni large inner hole spray guns. At the same time, it has also successfully developed bt-f1 double barrel ultra-fine powder feeder and physical method cooling system, which has raised the level of domestic plasma spraying equipment to a new level and shortened the gap with foreign equipment.
7. New sandblasting equipment
Recently, Beijing, Shanghai and other places have successfully developed small recyclable sandblasting equipment and large environment-friendly sandblasting equipment, greatly improving working conditions, reducing environmental pollution, and playing a positive role in promoting the development of thermal spraying technology in China.
Guangzhou Tuoshen Surface Treatment Co., Ltd., the spraying manufacturer, is preferred for purchasing spraying, Spray processing Factory, trustworthy
