Classify All
×
Tungsten, an important non-ferrous and strategic metal, has been the focus of attention since ancient times due to its unique properties. Tungsten ore was known in ancient times as "heavy stone," a name that vividly reflects tungsten's high density. In 1781, the Swedish chemist Carl Wilhelm Scheele first extracted a new elemental acid—tungstic acid—from scheelite. Subsequently, in 1783, Spaniard Depuy also extracted tungstic acid from wolframite, and for the first time obtained tungsten powder by carbon reduction of tungsten trioxide, thus officially naming this element.
Tungsten is located in Group VIB of the sixth period (second long period) in the periodic table. Although the content of tungsten in the earth's crust is not high, only 0.001%, its distribution is quite widespread. At present, more than 20 tungsten-containing minerals have been discovered, and these minerals are usually formed along with the activities of granitic magmas. After smelting, tungsten exhibits a silvery-white, lustrous metallic appearance. Its melting point is extremely high, and its hardness is also very high. These characteristics make tungsten widely used in many fields.
With continuous advancements in technology and accelerating industrialization, the demand for materials usable in extreme high-temperature environments is increasing. High-tech fields such as aerospace, energy, and automotive engineering place extremely high demands on the high-temperature properties of materials. For example, engine turbine blades and combustion chambers in the aerospace field need to operate stably for extended periods at temperatures of thousands of degrees. Traditional metallic materials cannot meet these needs, therefore, the research and development of high-temperature resistant metallic materials has become particularly important.
Refractory metals are a general term for metals such as tungsten (W), tantalum (Ta), molybdenum (Mo), niobium (Nb), and rhenium (Re), with melting points above 2400℃. Alloys based on refractory metals with other elements added are called refractory alloys, and their operating temperature is above 1200℃.
Address: China (Henan) Pilot Free Trade Zone Luoyang Area (High tech) Dongmagou Industrial Park No.1 Courtyard 1-9 Zone
E-mail:monfils.chen@mtwkj.com
Enterprise Station:http://www.mtwkj.com
Product Station:http://www.mtwxcl.com