Thermal spraying has a history of 100 years in the world, and nearly 50 years in China. Especially in the past 20 years, thermal spraying in China has made great progress and development. The following is a brief introduction to the overall level and status, equipment and materials, application, scientific research and development.
1. Overall level and status According to incomplete statistics, during the "Eighth Five Year Plan" period (1991-1995 including 1996), the total output value of China's thermal spraying industry was about 300 million yuan (including thermal spraying equipment, materials, construction and technical services, auxiliary equipment and materials, etc.). In 1996, the gross national economic output value of China was about 7.5 trillion yuan (about 910 billion dollars), and the output value of thermal spraying accounted for about 0.39/10000. According to the statistics of the Association, there are about 3000 thermal spraying employees (excluding temporary workers of construction teams) nationwide, and 300~350 units engaged in thermal spraying work, including thermal spraying equipment, materials, auxiliary machinery, auxiliary material manufacturers, thermal spraying construction, technical service units, as well as scientific research, teaching, development units and trading companies engaged in thermal spraying.
Thermal spraying enterprises are still dominated by small units (<30 persons), accounting for more than 90% of the total. The per capita output value of the thermal spraying industry is about 100000 yuan/person year, which is the best in the mechanical industry (top level).
According to relevant foreign materials, in recent years, the total output value of thermal spraying in the United States is about US $2 billion and that in Japan is 80 billion yen, accounting for 3.6/10000 and 2.3/10000 respectively of its gross national product (GNP). The ratio of thermal spraying output value to GNP weight is an important indicator of the development of thermal spraying in this country. This ratio of China is only 11% of that of the United States and 17% of that of Japan. This shows that thermal spraying in China is still in the development stage, far from reaching the maturity and saturation stage. Because of this, thermal spraying has a large market in China with many opportunities and promising development prospects.
2. After decades of independent development and introduction of thermal spraying equipment and materials, and learning from foreign advanced technology, China has been able to develop and produce vacuum plasma, atmospheric plasma, explosive spraying, plasma surfacing, arc spraying, flame powder spraying, flame wire spraying equipment, and metal powder (Ni Co, Fe base, about 300t/year in total), ceramics, cermet powder (Al2O3, Al2O3+TiO2, Cr2O3, WC Co, etc., about 200t/year in total), wire materials (Al, Zn, Cu, stainless steel, etc., about 1000t/year in total). Although the overall level of equipment is still low, and there are still some quality problems with materials, China has become one of the few countries in the world that can be self-sufficient in thermal spraying equipment and materials, basically meeting the needs of the thermal spraying industry. At the same time, about 10% of the equipment and materials still need to be imported.
3. Application of thermal spraying technology At present, thermal spraying technology has been widely used in China, mainly in aviation, aerospace, steel, petrochemical, steel structure anti-corrosion, machinery, light industry, textile, paper making, energy, shipbuilding, etc., with a total output value of about 200 million yuan/year. The application of thermal spraying in China has the following characteristics:
(1) It has a wide range of applications and has a fairly high level in some fields, such as aviation engine (cooperation with Boeing), annealing furnace bottom roll, galvanized guide roll (steel industry), valve (petrochemical industry), wire drawing guide roll, tower wheel, wire drawing ring, etc. (textile industry), high-grade glass mold (light industry), valve (automobile industry), etc.
⑵ A wide range of processes and materials are used. Almost all thermal spraying processes and materials currently used internationally are used in China, such as vacuum plasma spraying, atmospheric plasma spraying, explosive spraying, supersonic flame spraying, arc spraying, flame powder spraying, plasma surfacing, laser remelting, vacuum (protective atmosphere) remelting, etc.
⑶ The enterprises engaged in thermal spraying application (JobShop) are mainly small and medium-sized enterprises (<30 people), accounting for 2/3 of the total number of people, and the output value accounts for more than 75% of the total output value.
Guangzhou Tuoshen Surface Treatment Co., Ltd., the spraying manufacturer, is preferred for purchasing spraying, Spray processing Factory, trustworthy
