Technical Topics-第25页-Changsha Langfeng Metallic Material Co., Ltd.

Pretreatment of raw materials before forming（二）
Forming sub-mold-forming and special forming two categories.The former is the metal carbide powder or mixed material installed in the steel die through the mold on the powder pressure,pressure relief,the compact from the negative mold out.In this process,the powder and powder, powder and die and die wall due to the existence of friction,so that the process of force transmission and distribution changes,due to uneven pressure distribution,resulting in the density of the various parts of the compact and The intensity distribution is uneven: thus,a series of complex phenomena occur during the pressing process.In order to correctly formulate the forming process specification,rationally design the stamper structure,calculate the stamping parameters,etc.,need to carry on the detailed research to these phenomena. For more information please link: www.langfengmaterials.com,please contact us: sales@langfengmaterials.com
Advantages of powder metallurgy process
Advantages of powder metallurgy process: 1, the vast majority of refractory metals and their compounds, pseudo-alloy, porous materials can only be used to manufacture powder metallurgy method. 2, because the powder metallurgy method can be pressed into the final size of the compact, without the need or little need for subsequent mechanical processing, it can greatly save the metal, reduce product costs. When the product is manufactured by powder metallurgy, the loss of metal is only 1-5%, and the loss of metal may be 80% when produced by the general casting method. 3, because the powder metallurgy process in the material production process does not melt the material, it is not afraid of mixed with crucible and deoxidizer and other impurities, and sintering generally in the vacuum and reducing atmosphere, not afraid of oxidation, nor to the material Any pollution, it is possible to produce high-purity materials. 4, powder metallurgy method to ensure that the material composition ratio of the correctness and uniformity. 5, powder metallurgy suitable for the production of the same shape and the number of products, especially gears and other high cost of processing products, powder metallurgy manufacturing can greatly reduce production costs. For more information please...
Long-term corrosion of steel structure quality inspection
V. CONCLUSION Through the above analysis, we can draw the following conclusions: 1. Nowadays, the society has begun to seriously treat the systematic long-term preservation of steel structures, which is closely related to the safe operation of steel structures and the guarantee of life expectancy. 2. To strengthen the construction and maintenance of steel structures in the process of construction management and supervision of anti-corrosion, the project uses the party, the construction side and the professional supervision side is crucial. 3 in the steel structure design and production process, there must be professional anti-corrosion engineering and technical personnel and experts in the participation or guidance. 4. In China, arc spraying long-term anti-corrosion technology is an emerging technology developed in recent years, has attracted more and more attention, and the organic combination of coating technology, will have more market advantages.
Hunan WISE New Material Technology Co.,Ltd.
Hunan WISE New Material Technology Co.,Ltd. uphold the mission of the world benefit, is committed to doing the field of science and technology advances in new materials, builders, build the world's material industry aircraft carrier! Our company specializes in R & D, production and sales of new materials for aviation and aerospace, new materials for military rocket systems, spraying materials, functional materials, special ceramic materials, cemented carbide, metal ceramic materials and cutting tools.
High-speed gas spraying technology
High-speed gas spray guns like a small rocket engine,Figure 2 shows the structure of the JetKote spray gun. It consists of a closed combustion chamber and a nozzle.The gas and oxygen are injected into the combustion chamber at a pressure of 0.5 to 3.5 MPa and a flow rate of up to 0.016 m3 / s. The mixture is continuously combusted and the combustion products are swollen and ejected from a long nozzle to form a supersonic flame. As a sign of high temperature supersonic airflow, you can see the flame in the bright and dark rhombic shock. The sprayed material of the powder is injected into the nozzle from the combustion chamber and the nozzle, into the center of the flame,and is heated and accelerated to obtain a high kinetic energy and is ejected from the nozzle. Spray particles will not be oxidized in the combustion products. As the particles are in the center of the flame, the oxidation is also slightly slight in the process of leaving the nozzle to reach the surface of the workpiece, and the temperature of the flame in the combustion chamber usually does not exceed 3000 ° C.The flame flow from the nozzle...
Study on High – speed Arc Spraying of Aluminum – based Alumina
The anti-skid handling of the ship's main deck has always been one of the problems that plagued us. Many steel structures and components on the ship,such as the top deck, equipment and equipment handling area, personnel activities corridor, helicopter deck piles and other parts of the anti-skid surface has a high demand, the friction coefficient of 0.6 or more. Shipboard helicopters and personnel safety depends mainly on helicopter tires and aprons and personnel between the soles and the deck of sufficient friction. The anti-slip surface coating is a traditional composite coating system, that is, polymer and large particle size of the organic composite coating composed of emery. The corundum has a grain size of 0.45 to 0.9 mm and a coating thickness of 1.5 mm. However, this organic coating is easy to aging, short life, the combination of corundum and polymer coating strength is low, the use of easy to fall off, poor wear resistance, and thus the friction coefficient of poor ability to maintain. In addition,the polymer coating can cause environmental pollution.

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