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Introduction to Plasma Spraying Machine

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Author : Pei Ze Technology
Update time : 2020-07-20 09:42:51
  In 1958, the world's first plasma spraying equipment came out in the United States, making it possible to prepare coatings of high melting point materials (such as ceramics) by spraying. This technology immediately made an important contribution in the field of science and technology. With the rapid development of modern industrial technology, people have higher and higher requirements for the performance of various parts and components, and their surface treatment has received more and more attention, so the requirements for coating quality have become higher and higher. Because of the excellent performance of ceramic materials, more and more people are favored, which promotes the continuous improvement of the spraying process. The world's advanced industry, our company has sprayed different ceramic coatings on a variety of products to improve the product's performance and service life. Nowadays, ceramic coating technology is forming a new industrial field with a very broad market. It is precisely this market demand that the research and development of various ceramic coatings spraying equipment is being widely carried out. The development of plasma spraying equipment in the world is moving towards automation, integration, embedded production lines, flexibility, networking, even unmanned, and remote control through Interneti. At the same time, plasma ceramic coating technology is driving the development and rise of a series of high-tech technologies, such as ceramic-coated superconducting components, ceramic-coated biomedical functional materials, never-wear diamond film technology, new ultra-large-scale integrated circuits, high-tech Emissivity energy-saving coatings, wavelength absorption and anti-interference coatings, etc., have extremely broad development prospects.

1. Introduction to plasma spraying technology
  Plasma spraying is an extremely important process technology in the field of thermal spraying technology. At present, almost all powder materials for thermal spraying can be prepared into coatings with good performance by this method. Atmospheric plasma spraying, controlled atmosphere plasma spraying and liquid stable plasma spraying methods are being applied in plasma spraying. Several plasma spraying methods such as pulse, radio frequency and induction coupling are under research.
  Atmospheric plasma spraying uses hydrogen, nitrogen, and hydrogen as ion gas, and generates a plasma high-temperature jet after ionization, which melts or melts the input material and sprays it on the surface of the workpiece to form a coating. Mainly used to prepare metal ceramics and ceramic coatings. On this spraying device, the spray gun was improved to develop supersonic plasma spraying. The plasma flame flow has higher energy density, faster flame flow speed and denser coating. Controllable atmosphere plasma spraying is to place a plasma spray gun in a closed chamber and operate by a manipulator. Vacuum plasma spraying is used to draw the chamber to a vacuum state, and low-pressure vacuum plasma spraying is used for low-pressure chambers. Due to the low pressure and controllable atmosphere, the plasma flame flow is lengthened, the particle heating is more fully, the oxidation is reduced, the quality of the coating is significantly improved, and the thermal spraying is expanded in the deposition of diamond film and superconducting oxide coating. Applications.
2. System composition and characteristics of new plasma spraying equipment
  In many aspects, its performance is better than 7M and 9M systems. Its main features are efficiency, high stability and high cost performance. DH-1080 plasma spraying equipment is composed of six main parts: power supply, control cabinet, spray gun, transfer box, powder feeder and chiller.
  The system adopts the concept of low-voltage and high-current power supply. Compared with the magnetic amplified plasma spraying power supply, its response speed is faster and the power factor is higher. Compared with the inverter power supply, it provides higher power, and only a single power supply can make the system work normally. And its power supply structure is much simpler than the inverter power supply, which also reduces the complexity of the control system, while also reducing production and manufacturing costs to a certain extent.