Tungsten and tungsten alloys Very versatile, tungsten is a modern industrial, defense and high-tech applications in one very important functional materials, and is widely used in aerospace, nuclear, marine, automotive industry, tungsten sheet electrical industry, electronic industry, chemical industry and other areas. Most of tungsten carbide andtungsten bolts in the production of iron. Tungsten and chromium, molybdenum, cobalt alloy molybdenum disk composition for the production of heat-resistant tools, such as gas turbine blades and combustion tube. Tungsten with tantalum, niobium, molybdenum and other components difficult fluxing. Tungsten and tungsten copper silver alloy material used as electrical contacts. High density tungsten nickel-copper alloy as radiation tungsten weights protection shield. Tungsten wire, rods, sheets, etc. for the production of light bulbs, tube components and arc welding electrodes.
Molybdenum carbide has a high melting point and hardness, good thermal stability and mechanical stability, and excellent corrosion resistance and other characteristics. Molybdenum is a silvery white refractory metal, a melting point of 2615 ℃, density of 10.2 g / cm 3, the expansion coefficient is small, a special tube is almost the same coefficient of expansion of the glass. Molybdenum stable at room temperature is higher than 600 ℃, rapidly oxidized.
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