Technical Topics-第2页-Changsha Langfeng Metallic Material Co., Ltd.

Research Status of Metal Coatings
Thermal coating of metal coating is the research and application of early wear-resistant coating, commonly used metal (Mo, Ni), carbon steel and low alloy steel, stainless steel and Ni-Cr alloy series coating. In general, flame spraying, arc spraying, plasma spraying, HVOF and explosive spraying process are used. The coating has the advantages of high bonding strength with the matrix, good wear resistance and corrosion resistance, and is used for repairing wear parts and machining parts. The use of aluminum alloy plasma spraying technology on the piston ring, synchronous ring and cylinder and other parts of the spray, the coating has good wear resistance, high bonding strength and excellent adhesion resistance, in the case of lubricating oil has a good condition Anti-bite and anti-scratch performance. High-carbon steel wire, stainless steel (Crl3 type, 18-8 type, etc.) alloy wire is commonly used wear-resistant corrosion resistant coating material [13-15]. With high strength, good wear resistance, a wide range of sources, low prices and so on. NiCr coating has good heat resistance, corrosion resistance and erosion resistance wear performance, can be used as power plant boiler superheater tube and reheater tube protective coating, the use of flame and plasma spraying method can be prepared...
Cutting tool coating
Cutting tool coating refers to the surface of the mechanical cutting tool coated with a layer of high hardness and wear resistance of the material. To meet the modern machining requirements for high efficiency, high precision, high reliability, the world’s manufacturing industry, the development of coating technology and tool manufacturing in the growing importance of industrial plants in developed countries, the implementation of the coating Layer of the tool in the overall proportion of nearly 60%.
Powder coating prospects
In the promotion of environmental protection laws and regulations,limit the emissions of VOC powder coating will be more widely used,if the coating line and solvent-based,water-based paint to compare the comprehensive evaluation,the powder coating will replace the other Painting.
Surface pretreatment techniques for thermal spray technology
Its purpose: First, the workpiece surface suitable for coating deposition, increase the bonding area; the second is to overcome the shrinkage of the coating stress. Some parts of the workpiece corresponding pre-processing to disperse the local stress coating to increase the shear resistance of the coating. Common methods are cutting corners and pre-coated troughs. The rough surface of the workpiece thread is also one of the commonly used methods, especially in the spraying of large parts commonly used thread turning to increase the combined area. Turning thread should pay attention to two problems, first of all, the thread cross-section should be suitable for spraying, rectangular cross-section or semicircular cross-section is not conducive to the combination of coating. In addition, the thread should not be too deep, otherwise the coating is too thick, the cost increases. It is also possible to “knurl” the coated surface or to combine the thread turning and knurling.
Nano-zirconium carbide fiber application
Nano-zirconium carbide（vedio） used in fiber: different zirconium carbide silicon carbide powder content and the way of addition to the fiber near-infrared absorption performance, when the fiber zirconium carbide or silicon carbide content of 4% by weight, the fiber near infrared absorption Preferably, the near-infrared absorption effect of adding zirconium carbide and silicon carbide in the shell of the fiber is superior to that added to the core layer.
promise microwave applications

‹123 4 ›