The thermal conductivity of tungsten carbide needles is relatively poor, usually only about 1/3 to 1/2 of that of copper. This is because the main component of tungsten carbide needles is tungsten, and the thermal conductivity of tungsten is relatively low. Although tungsten carbide needles have poor thermal conductivity, in some high-temperature environments, tungsten carbide needles can exert their superior high-temperature performance and are not easy to melt, so they still play an important role in some applications in high-temperature environments.
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