Surface treatment of engineering characteristics and development of thermal spraying technology(二)
Due to surface engineering technology energy saving, materials saving, thereby protecting valuable resources for human survival, but also for environmental protection has played a very crucial role. Surface engineering technology of the 21st century will permeate all walks of life, and promote social civilization and improve the quality of life.
Surface thermal spray technology is an important branch of engineering, it is through the flame, electric arc or plasma and other heat source, some linear and carbide powder
material is heated to a molten or semi-molten state, and will accelerate the formation of drops of melting speed discharged into the substrate to form a coating. Coating with excellent performance of resistant to wear, corrosion resistance, high temperature resistance , insulation and so on, and is able to wear, corrosion or processed due to part size tolerance reduce repair, and is able to wear, corrosion or processed due to part size tolerance reduce repair. Application of thermal spray technology include: long-term corrosion, mechanical repair and advanced manufacturing technology, mold making and repair, and manufacture of special features four coatings. Currently, thermal spray technology has been widely used in almost all industrial sectors and household goods (such as non-stick, infrared health electric heaters, etc.).
The end of the 20th century, the development of thermal spray technology was very quickly, and was quickly widely used. To the end of 20th century, plasma spraying is still dominant. It is noteworthy, high-speed flame spraying (HVOF) rapid development will occupy 25% of the market share, ranking second. Arc spraying technology, because the economy is good, the coating layer performance superior than flame spraying, flame spraying technology will partially replace rose to third place.