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Tungsten (Wolfram) is a kind of dense, hard and high-melting-point metal, which has excellent wear resistance, corrosion resistance and high-temperature resistance. It belongs to the group of refractory metals. The high-temperature physical properties of tungsten include high melting point, low thermal expansion coefficient, high resistance to oxidation and high-temperature fatigue, etc. The applications of tungsten mainly include:

1. Engineering and machinery: tungsten wire is used in grinding tools, electromechanical equipment and other parts, especially for high-speed grinding tools and electromechanical equipment.

2. Chemical industry: tungsten wire is also used in the production of chemical equipment, such as tungsten crucible and tungsten tube.

3. High-temperature materials: tungsten is a kind of excellent high-temperature material, which can be used in the production of high-temperature equipment and tools.

4. Welding materials: tungsten is also used in welding materials, such as tungsten electrode and tungsten inert gas welding (TIG) torch.

5. Other applications: tungsten is also used in other fields such as aerospace, medical treatment, nuclear energy and electromagnetism.
   
   Tungsten applications include:
   1. Alloying agent: Tungsten is often used as an alloy agent to improve the mechanical properties of steel, such as strength, toughness and wear resistance.
   2. Aerospace: Tungsten is a high-strength material with good wear resistance and toughness, and is widely used in aerospace, automotive and other fields.
   3. High-temperature materials: Tungsten has good heat resistance and corrosion resistance, and can be used in the production of high-temperature equipment and chemical equipment.
   4. Welding materials: Tungsten rods are commonly used welding materials, which can improve the welding quality and efficiency of welding work. 5. Tool materials: Tungsten is a good heat-resistant and wear-resistant material, and can be used in the production of various tools, .such as cutting tools, grinding tools and so on.
   6. Dense fuel particles: Tungsten particles are widely used in high-power reactors, microwave power sources and other high-tech fields due to their excellent properties.