Do you know what the English letters and numbers in the model of tungsten carbide thread insert mean? Let's take 17NR8-3RD as an example to understand the type of a tungsten carbide thread insert.

Ammonium metatungstate (AMT) is one of the most important raw materials and precursors for preparing tungsten carbide catalyst. The physical and chemical properties of AMT affect the structure and performance of the prepared tungsten carbide (WC). The particle size and structure of the precursor will have a greater impact on the later reduction carbonization process, which in turn will affect the catalytic activity of the tungsten carbide catalyst, according to the researchers.

High purity ammonium metatungstate is a water soluble crystalline powder with white or yellowish appearance. It is an important intermediate compound in the tungsten wet smelting process. Also, it is one of tungsten catalysts. The active component of ammonium metatungstate (AMT) catalyst is tungsten trioxide (WO3), which is used as a catalyst carrier. With the vigorous development of the petroleum processing industry, the research, development and application of high purity ammonium metatungstate have also been directly promoted.

Ammonium metatungstate (AMT) can be used as an active component to prepare a high specific surface area porous honeycomb ceramic catalyst, so that the catalyst can better adapt to application conditions such as frequent temperature changes, high nitrogen oxide concentration, high thermal stability, and high surface area.