The physical properties of tungsten sheets!
Tungsten sheet rolling can be divided into hot rolling, warm rolling and cold rolling. Due to the high deformation resistance of tungsten, ordinary rollers cannot fully meet the requirements for rolling tungsten plates, and rollers of special materials should be used. During rolling, the rolls must be preheated, and the preheating temperature is 100 to 350°C according to different rolling conditions. The blank can be processed only when its relative density (the ratio of actual density to theoretical density) is greater than 90%. The processing performance is good when the blank density is between 92 and 94%. The billet opening temperature of hot rolling is between 1350 and 1500°C. If the deformation process parameters of billet opening are not selected properly, the billet will be delamination. The starting temperature of warm rolling is 1200°C, and the thickness of a hot-rolled plate with a thickness of 8 mm can reach 0.5 mm after warm rolling.
Tungsten sheet steel is gray or silvery white, has high hardness, high melting point, and is not corroded by air at room temperature. It is mainly used for manufacturing filaments and high-speed cutting alloy steel, super-hard molds, and is also used in optical instruments and chemical instruments. China is the largest tungsten reserve country in the world.
Tungsten sheet is a metal element with silver-white crystals, hard and brittle, and has a high melting point. It can be made into very fine wire and special alloy steel: tungsten wire. Ferrotungsten. Tungsten steel. Tungsten sand (selected tungsten ore).
Tungsten is a non-ferrous metal and an important strategic metal. Tungsten ore was called "heavy stone" in ancient times. In 1781, the Swedish chemist Carl Wilhelm Scheele discovered scheelite and extracted a new elemental acid, tungstic acid. In 1783, the Spaniard De Puya discovered wolframite and extracted tungsten acid from it. In the same year, tungsten acid was also extracted from wolframite. Carbon reduced tungsten trioxide to obtain tungsten powder for the first time and named the element. The content of tungsten in the earth's crust is 0.001%. There are 20 kinds of tungsten-containing minerals that have been discovered. Tungsten deposits are generally formed along with the activity of granitic magma. After smelting, tungsten is a silver-white shiny metal with a high melting point and high hardness. Tungsten is an element with a higher melting point.
