Recently, China's newly developed TMH20/15MN large radial precision forging machine was successfully tested at one heat load, and the first qualified high-end bar was forged. The successful test of the radial precision forging machine marks that the core manufacturing equipment of high-end pipe in China will no longer be easily "card neck"! However, this also means that China has successfully broken one of the technical barriers that have long been completely monopolized by foreign countries - large radial precision forging machine preparation technology!

potassium containing tungsten bars are raw materials for making light source materials, high-temperature heaters and high-temperature resistant components. The traditional production method is to add silicon, aluminium, potassium and other elements into tungsten oxide powder first, then reduce the tungsten oxide powder doped with these elements and wash it with hydrochloric acid and hydrofluoric acid to obtain doped tungsten powder, then doped tungsten powder. After being pressed, the strips are sintered and sintered to obtain potassium containing tungsten bars.

Tungsten trioxide (WO₃) is a typical n-type semiconductor material, which has broad application prospects in electrochromic devices, gas sensors and photocatalysts. Particularly in the field of photocatalysis, WO₃ has a narrow band gap (2.4-2.8eV) compared with other semiconductors (such as titanium dioxide and Bi₂O₃), which can utilize solar energy more effectively.

Scanning Tunneling Microscope (STM) is an instrument for detecting various surface information with atomic spatial resolution. The structure of the probe tip is one of the main factors determining the performance of the instrument. For example, the size, shape and chemical purity of the tip will affect the electron density of states of the atoms on the surface of the material under test, and the image of the STM. It has important influence on the resolution and quality.

Heteropoly acids, also known as polymetallic oxygen clusters, are metal-oxygen clusters formed by bridging metal atoms with oxygen atoms. The so-called Keggin-type heteropoly acid has the reversible redox property of multi-electrons. Therefore, the active capacity of the composite material used as the cathode of lithium-ion batteries reaches 260 Ah/kg, which is much higher than that of ordinary lithium-ion batteries.

Tungsten carbide ceramics are widely used in metal processing, mining and other fields because of their high hardness, wear resistance, heat resistance, corrosion resistance and other excellent properties. However, tungsten carbide ceramics have high manufacturing cost and brittleness, and are not suitable for wearable parts with high impact force.

Vanadium dioxide (V0₂) is a typical temperature-controlled phase change material, which undergoes a reversible metal semiconductor phase transition from low temperature monoclinic phase (M phase) to high temperature rutile phase (R phase) at 68 ℃. However, in practical application, 68 is obviously not the appropriate temperature for human beings. Therefore, in order to make vanadium dioxide play a role, it is necessary to reduce the phase transition temperature of vanadium dioxide from 68 to the room temperature (25 ℃), in order to maximize the energy-saving efficiency of vanadium dioxide.

In the traditional recovery and treatment of waste tungsten powder, the powder waste tungsten powder is first oxidized into tungsten oxide, and then tungsten oxide is dissolved by alkali to form tungstate. In this way, not only the process is complex, but also the efficiency is very low. The oxidation rate of waste tungsten powder is usually less than 50%. Unoxidized tungsten powder needs to be recycled by other methods again. At the same time, because the powder waste tungsten powder is directly treated, the dust in the environment is very large, it is difficult to collect more thoroughly, and also causes a lot of tungsten loss.

In the sintering process of tungsten-titanium target, the importance of production of tungsten and titanium powder is obvious. The properties of tungsten titanium powder greatly affect the properties of tungsten-titanium products. With the increasing demand of the market, the production of tungsten titanium powder has not only the requirements of chemical purity, but also the requirements of physical and technological properties. In particular, the preparation technology of ultra-fine tungsten titanium powder for some special purposes needs to be solved.

Compared with traditional thorium tungsten alloy wire, cerium tungsten alloy wire has lower electron escape work (only 2.8eV, 10% lower than thorium-tungsten alloy wires), higher emissivity (27 times higher than thorium-tungsten alloy wires at 1500K), higher luminescence efficiency (10-15% higher than thorium-tungsten alloy wires), lower arcing voltage (about 40% higher than thorium-tungsten alloy wires), and no human body. The radioactive pollution produced by the body is a good product of green environmental protection. It can be used to replace thorium tungsten alloy wires in electron emission tubes, argon arc welding, etc. It has very broad application prospects in high-demand electric light sources.