The historical development of tungsten
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1750s have found that tungsten on steel properties. However, tungsten steel began to produce and widely used in the late 19th and early 20th centuries. 1900 World Exhibition in Paris, for the first time exhibited high-speed steel. Therefore, tungsten extraction industry has been developing rapidly since. The emergence of this steel metal cutting field marks a significant technological advancement. Tungsten become the most important alloying elements. In 1900, the Russian inventor А.Н.Ладыгин first suggested in the application of tungsten light bulbs. In 1909 Кулидж formulated based on powder metallurgy method, using pressure processing technology methods, tungsten is possible in the power vacuum technology has been widely applied. 1927 to 1928 using the main component developed tungsten carbide tungsten carbide, tungsten development which is an important stage in the history. The nature of these alloys have all aspects of the tool steel than the best in modern technology has been widely used
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