Technical Topics-第7页-Changsha Langfeng Metallic Material Co., Ltd.

Performance characteristics of molybdenum carbide
As a new kind of functional material with high melting point and hardness, good thermal stability and mechanical stability, excellent corrosion resistance, molybdenum carbide has been widely used in various fields such as high temperature resistance, abrasion resistance and chemical resistance. Has a similar precious metal electronic structure and catalytic properties. Widely used in hydrogen-related reactions such as alkane isomerization, unsaturated hydrocarbon hydrogenation, hydrodesulfurization and denitrification reactions for the super-hard tool materials, wear-resistant materials, heating materials and high-temperature structural materials.
Application of Thermal Spraying Technology in Remanufacturing Engineering
Remanufacturing projects require specific key technologies as support. Advanced surface engineering, as well as nano-surface engineering technology is one of the most important key technologies in remanufacturing. Thermal spraying technology is an important component of (nano) surface engineering. It is the essence of the material to be sprayed to the molten or semi-molten state, and then under the action of high-speed pressure gas jet quickly into the matrix, and finally by the collision deformation and accumulation forming. There are many kinds of thermal spraying methods, including high-speed arc spraying and supersonic plasma spraying applications. Nano-structured coatings can be prepared by supersonic plasma spraying. Study on High Temperature Corrosion and Erosion of Intermetallic Coatings by High Speed ??Arc Spraying Large-scale power plant boiler water wall pipe work environment is very bad, hot corrosion is very serious. The boiler fuel is coal, coal contains S, K, Na, V and other impurities, in the formation of SO2, SO3, H2S, V2O5, etc., and the air O2, NaCl and other reactions in the pipeline surface deposition of molten salt, thus Accelerated corrosion of materials. The high Ni-Cr alloy coating can effectively prevent hot corrosion by spraying the pipe wall, but the method is costly and...
The role of tantalum niobium in alloy
In the cemented carbide, our most commonly used three functions of tantalum and niobium is to inhibit grain growth, improve alloy red hardness and fatigue resistance. We must understand that the characteristics of the tantalum and niobium comparison, is basically a comparison of the two elements. Since the amount of alloy in the addition is not a lot, so to get the same quality of the alloy, you can change from the amount of tantalum and niobium obtained. However, due to the atomic weight of tantalum and niobium and the crystallization temperature of the two different, therefore, in the alloy production must be comprehensive and balanced production process in order to obtain the desired product quality. For more information please link: www.langfengmaterials.com,please contact us: sales@langfengmaterials.com
Steel bonded carbide
Although the carbide has a high hardness, wear resistance and cutting performance, but the impact toughness is very low, and can not be used forging forming, can not be used to cut the processing method, the use of a certain degree of limitations. The cemented carbide is also a high hardness material prepared by powder metallurgy. The difference between the hard alloy and the cemented carbide is that the hard phase content is reduced to below 50% and the steel is used as a binder to obtain a uniform distribution on the steel substrate A large number of fine alloy carbide particles are organized. The steel bonded carbide can be forged and shaped to facilitate the manufacture of different shapes of tools, and forging can overcome the shortcomings of powder metallurgy products density is not high enough to improve the mechanical properties of steel bonded carbide.
Powder Metallurgy Molding Technology
Powder metallurgy is a process for making metal powders, as well as the use of forming and sintering processes to produce metal powders into articles. With the continuous development of modern technology, a variety of new processes have emerged, but also has been very widely used. In our powder production process, including the preparation of powder, powder mixture and so on. Many times we are in order to improve the moldability and formability of our powder. Usually we add plasticizers such as gasoline, rubber or paraffin during the production process.
Anti – corrosion technology of thermal spraying metal ladder coating
With the implementation of the national South-to-North Water Diversion Project, the use of hydraulic steel structure will increase rapidly. It is very important to study and develop a new type of anti-corrosion technology of hydraulic steel structure, which will reduce the project cost and prolong the project life. To this end, the two kinds of metal coating the advantages of each complement each other, in the same workpiece substrate superimposed spray, first with zinc coating as the bottom layer, and then stainless steel coating as a surface layer, and ultimately the formation of ladder coating, applied to the water Industrial steel structure, after a lot of research and testing to obtain both economic and satisfactory anti-corrosion effect.

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