customized stranded tungsten wire for vacuum coating

The production method of tungsten wire for vacuum coating usually includes the following steps:

Raw material selection: Select high-quality tungsten powder as the raw material for producing tungsten wire. Powder mixing: Tungsten powder is mixed with binders and other additives to form a homogeneous mixture, which is then pressed into a solid form using pressing technology. Sintering: A compacted tungsten mixture is subjected to high temperatures in a controlled atmosphere to sinter the particles together to form a solid tungsten wire. Drawing: The sintered tungsten wire is then drawn through a series of dies to obtain the desired diameter and smooth surface finish. Annealing: Drawn tungsten wire can be annealed (a heat treatment process) to increase its ductility and eliminate any residual stress. Surface Treatment: Tungsten wire can have additional surface treatments, such as cleaning, polishing or coating, to enhance its suitability for vacuum coating applications.

These steps may vary depending on the specific requirements of the vacuum coating process and the desired properties of the tungsten filament.

Tungsten wire is commonly used in vacuum coating processes due to its high melting point, excellent thermal conductivity, and low vapor pressure at high temperatures. When used as a heating element or filament in a vacuum coating system, tungsten filament can effectively generate heat to evaporate coating materials such as metals or ceramics. This evaporation process causes the coating material to be evenly deposited onto the substrate surface, forming a thin, uniform coating. Tungsten wire’s ability to maintain structural integrity and resist deformation at high temperatures makes it ideal for vacuum coating applications, where temperature control and stability are critical to achieving consistent coating results. In addition, tungsten’s low vapor pressure ensures minimal contamination of the vacuum environment during heating and vaporization.

Overall, tungsten wire’s strong properties and high temperature resistance make it a reliable choice for vacuum coating systems, helping to produce high-quality, uniform coatings on a variety of substrate types.

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