Tungsten News

Tungsten News
Performance of the Coated Cemented Carbide Tools 2,227

The ratio?of coated cemented carbide tools in metal processing industry is increasing steadily. In recent 10 years, its quality and?performance?have been significantly improved. On the one hand, due to the quality?improvement of the coating , it?will be better to control porosity and thickness; on the other hand, the metallurgical technology between the coating and the substrate interface has also been improved, therefore can?increase?the adhesion of the coating and prevent?the interfacial reaction that reduces the strength. Increasing cutting speed can significantly…

Tungsten News
Molybdenum Sputtering Target Is Essential for Semiconductor Chip 328

Nowadays, sputtering targets have a wide range of applications, from semiconductor chip to the film deposition of various materials in integrated circuit processing, to energy-saving glass, familiar golden tungsten carbide coting made of titanium nitride and wire-resistance coatings for tools and daily necessities. Many materials can be obtained in the form of sputtering targets during fabrication of CDs and DVDs. Sputtering is a mature technology, which can deposit films of various materials on many shapes and sizes of substrates. This…

Tungsten News
Molybdenum Sputtering Target for Flat Panel Displays, Marking China’s Breakthrough on This Technology 374

China has developed the first G6 super-large high-end molybdenum target with completely independent intellectual property rights, and put into mass production in 2018. This means that China is the first country that can produce super-size target for semiconductors in the Asia-Pacific region, and breaks the European monopoly on this core technology. As we all known, limited by equipment and technology, China have to import a large number of this kind of product every year, but now, the breakthrough means that…

Tungsten News
How do Impurities of Glass Material Affect Service Life of Molybdenum Electrode? 331

Among the types of cups and pots on the market, glass is the healthiest, safest, and most widely used cups, according to relevant research data. There are various kinds of glasses in the market, but only those with pure glass material, crystal clear body, and moist feel are deeply loved by consumers. How to produce high-quality glass? The production process of glass is batching, melting, forming, sintering and annealing. Among them, melting is extremely important for the quantity of finished…

Tungsten News
Forging and Annealing Process of Pure Tungsten Bar 282

Pure tungsten bar is made of 99.95% tungsten?power and its forging and annealing process?is shown by test. The bar?has physical properties e.g. density 19.3g/cm3, melting point (liquid) 3422℃,?electricity conductivity 30% IACS min and hardness 69hra min. It owns?special characters including low thermal expansion, good thermal conductivity, sufficient resistance and high elastic modulus. The bar?is widely applied in various fields, e.g. support line, lead-in line, printer needle, various electrodes, quartz furnace, filament, high-speed tools, automatic products, sputtering target and heating devices…

Tungsten News
Tungsten Copper Resistance Welding Influential Factors 221

There are many factors, which can influence the welding effort of resistance welding, which is applied tungsten copper as electrodes, such as welding current, time, pressure, electrode shape and properties and workpiece surface condition. 1.0 Influence of welding current The influence of current on heat generation is greater than both resistance and time. Therefore, in the spot welding process, it is a parameter that must be strictly controlled. The main causes of current changes are grid voltage fluctuations and changes…

Tungsten News
Tungsten Copper Resistance Welding Types 241

There are four types of resistance welding, which can use tungsten copper bonded copper electrode as welding tip, spot welding, seam welding, butt welding and projection welding. Spot welding assembles the weldment into a lap joint and presses it between two cylindrical electrodes to melt the base metal using resistance heat to form a solder joint, which is mainly used for thin plate welding. The processes are preloading to ensure good contact of the workpiece, energizing to form nugget and…

Tungsten News
Tungsten Copper for Resistance Welding 226

Tungsten copper is a material with high electricity conductivity, when using for resistance welding, the material is bonded with copper hand. This kind of welding method refers to a method in which electric current passes through the welding objective and the resistance heat generated at the contact point as a heat source to locally heat the objective while pressing for welding. There are many advantages for this kind of welding method, high productivity, low deformation and easy automation realization. The…

Tungsten News
Cobalt Doped Nano Tungsten Oxide for Anode Material 186

Compared with commercial graphite anode materials for lithium-ion batteries, nano-transition metal oxide anodes have better lithium storage properties and higher theoretical specific capacity, which are more in line with future social development requirements. As far as the transition metal tungsten trioxide is concerned, it is not only eco-friendly, but also low in price and high in theoretical specific capacity. It is undoubtedly a negative electrode material with great development potential. However, bulk tungsten trioxide has low conductivity and large volume…

Tungsten News
Submicron Yellow Tungsten Oxide 196

Network data shows that tungsten trioxide with a particle size in the range of 100nm-1000nm is called submicron yellow tungsten oxide. According to the quantum size effect, although the specific surface area of submicron yellow tungsten oxide is smaller than that of nano tungsten oxide, it still has the advantages of excellent gas sensitivity and not easy to agglomerate. Gas sensitivity can be simply understood as the appearance characteristics of chemical materials, such as color, which easily changes significantly with…

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