Tungsten Machining
Tungsten
Tungsten is a hard, rare metal when uncombined under standard conditions. It is found naturally only in chemical compounds and its important ores include wolframite and scheelite. A chemical element with the chemical symbol W and atomic number 74, Tungsten is also known as wolfram. It has the highest melting point of all the elements and is most commonly used in obtaining heavy metal alloys such as high speed steel, which can contain as much as 18% tungsten. Tungsten has a remarkably high density of 19.3 that of water and can be compared to that of uranium and gold and approximately 1.7 times higher than that of lead.
Tungsten Usage
Tungsten machining alloys support a broad range of applications such as aerospace, automotive industries, radiation shielding, incandescent light bulb filaments, electrodes in TIG welding, electronics, electrical and heating. Hastelloy and Stellite, superalloys containing Tungsten, are used in turbine blades and wear-resistant parts and coatings. Due to the hardness and high density of Tungsten machining, it is used in military applications in penetrating projectiles and rocket nozzles, as used in the UGM-27 Polaris submarine-launched ballistic missile. Accounting for approximately 60% of current Tungsten consumption is Tungsten carbide in cemented carbides, also called hardmetals. These wear-resistant materials are used by the metalworking, mining, petroleum and construction industries.
Machining Tungsten
Stellite alloys are difficult to machine and tend to have extremely high melting points due to the cobalt and chromium content. Typically, Stellite machining is completed by grinding, as opposed to cutting and parts are precisely cast to require minimal machining.
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