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The development history of tungsten

  • Mosten
  • 26 Jun

Tungsten is a non-ferrous metal and is also an important strategic metal. The tungsten ore is known as the "heavy stone" in ancient times. In 1781, the white-tungsten ore was discovered by the Swedish chemist, Carl William Schiller, and a new element acid-tungstic acid was extracted. In the same year, tungsten powder was first obtained with carbon-reduced tungsten trioxide, and the element was named. The content of tungsten in the earthundefineds crust is 0.001%. There are 20 tungsten-containing minerals that have been found. The tungsten deposit is usually formed by the activity of the granitic magma. The smelted tungsten is a silver-white metal with high melting point and high hardness. W is the metal with the highest melting point. In the 1950s, chemists had discovered the influence of tungsten on the properties of the steel. However, that start of production and widespread use of tungsten steel was at the end of the 19th century and the early 20th century. high-speed steel was first exhibited at the Paris world fair in 1900. Therefore, the extraction industry of tungsten has developed rapidly from this point. The appearance of such steel marks a significant technological advance in the field of metal cutting processing. W is the most important alloy element. In 1900, the Russian inventor. No, no, no. In the first place, it is recommended that tungsten be applied in the lighting bulb. In 1909, the method of powder metallurgy based on powder metallurgy is developed, and after the process of pressure processing, tungsten can be widely used in electric vacuum technology. In 1927 _ 1928, a hard alloy was developed by using tungsten carbide as the main component. This is an important stage in the development of tungsten industry. The properties of each of these alloys exceed the best tool steel and are widely used in modern technology.

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tungsten