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Tungsten Alloy is an alloy with tungsten as the main element and added with Ni、Cu、Co、Mo、Cr and other elements. It has a series of excellent characteristics: the density is as high as 16.5-19.0 g/cm3; The specific gravity is 16.5-18.75 g/cm3. The tensile strength is 700-1000 MPa. Strong ability to absorb rays, 30-40% higher than lead; The thermal conductivity is 5 times that of die steel. The coefficient of thermal expansion is small, only 1/3-1/2 of iron or steel; Good weld ability…

The climax of research on the brief history of tungsten alloy development is mainly divided into the following four stages: The climax of the first research was from the Second World War to the middle and late 1980s. Politically, NATO and Warsaw Pact, led by the United States and the Soviet Union, had a cold war, and the East and the West were confronted with each other, which made the world political situation grim. In science and technology, the third…

As an important intermediate product of transition metal tungsten, tungsten powder (W) is often used to produce tungsten products such as tungsten oxide, tungstate, tungsten carbide, tungsten rod, and tungsten bar due to its strong reducibility. However, due to the different particle shapes of W powder, the physical and chemical properties and specific uses of tungsten products are also different. According to different particle shapes, W powder can be divided into spherical tungsten powder and irregular tungsten powder. The following…

As an important raw material for tungsten production, the physical and chemical properties of spherical tungsten powder (W) directly affect the quality and use of tungsten products. Under normal circumstances, the higher the purity of the powder, the lower the oxygen and carbon content, the better the thermodynamic properties of tungsten processing materials. However, the physical and chemical properties of the powder are not the only factor that determines the quality of tungsten products. The performance of tungsten parts is…

Compared with the powder metallurgy method, the tungsten parts produced by 3D printing technology not only have richer shapes, but also have higher comprehensive properties such as shielding performance and high temperature resistance, which also makes them more useful. The main uses of 3D printing tungsten are as follows: 1) Manufacturing medical collimators. Compared with metallic lead, tungsten alloy is more suitable for the production of collimators, not only because the alloy is environmentally friendly and non-toxic, but also has…

3D printing technology (additive manufacturing) can not only print organic materials such as nylon, plastic, resin, but also stainless steel, aluminum alloy powder, titanium alloy powder, and tungsten alloy powder. As far as tungsten powder is concerned, although additive manufacturing can effectively make up for the shortcomings of powder metallurgy technology, such as the inability to manufacture complex-shaped parts and general product performance, it does not mean that the products manufactured by this method are flawless. Applications in some areas…

Nano transition metal oxide anode has good lithium storage performance, such as CuO, Fe2O3, Co3O4, WO3, etc., can store lithium through conversion reaction, and its capacity is much higher than that of commercial graphite anode. Among them, WO3 is the most stable oxide of tungsten at room temperature, with low environmental pollution, reasonable price, and high theoretical specific capacity (693mAh/g). It is a anode material with development potential. However, bulk WO3 has low conductivity and large volume changes during charging…

The reason why semiconductor sensor uses low-dimensional nano tungsten oxide particles as sensitive materials is that the particles have high purity, large specific surface area, small particle size, uniform distribution, clean surface, low bulk density, easy dispersion, and excellent gas sensitivity, etc. More generally speaking, compared to traditional gas-sensitive materials, gas-sensitive materials made of nano-WO3 particles have faster response speed, better selection performance, and are more ecologically friendly, so they are suitable for detecting alcohol and gases such as nitrogen…

Common production methods of ammonium paratungstate (APT) include evaporation, neutralization, crystallization, freeze-drying and solvent extraction. Among them, the solvent extraction method is a new method that has just been designed in recent years. 1.Evaporation Method According to the different uses of APT, the evaporation process is also different. For example, the APT used in the production of tungsten wire usually adopts a jacketed steam-heated evaporator, and the steam pressure is generally controlled at (0.5～2.0)×105Pa. There is also a jacket-heated agitation…