The uneven resistance of tungsten wire may cause the following faults:
Local overheating and melting:
When the resistance of various parts of tungsten wire is uneven, the parts with larger resistance will generate more heat when current passes through.
The accumulated heat may cause the temperature of the part to rise sharply, and when the temperature reaches the melting point of tungsten, the tungsten wire will melt.
Especially in applications such as incandescent lamps, the sublimation rate of tungsten wire is uneven during use, causing some parts to become thinner and the resistance to increase, which makes it more prone to overheating and melting.
Uneven current distribution:
Uneven resistance will cause uneven distribution of current on tungsten wire.
The current tends to pass through parts with smaller resistance, which may cause these parts to bear excessive current density, thereby accelerating aging and damage.
Degradation of performance and shortened life:
Uneven resistance will affect the overall performance of tungsten wire, such as luminous efficiency and stability.
During long-term use, uneven resistance distribution may cause the overall performance of tungsten wire to gradually decline.
In addition, due to local overheating and uneven current distribution, the life of tungsten wire may be significantly shortened.
Safety hazards:
Uneven resistance may cause the tungsten wire to suddenly melt at high temperatures, which will not only cause equipment failure, but may also generate arcs or sparks.
In some applications (such as lighting equipment, heating elements, etc.), this sudden melting may cause fire or other safety hazards.
To avoid these failures, the following measures can be taken:
Optimize the manufacturing process: Ensure that the resistance distribution of the tungsten wire is uniform by improving the manufacturing and processing process of the tungsten wire.
Choose the right material: Choose tungsten wire materials with high purity and uniform microstructure to reduce the possibility of uneven resistance.
Strengthen quality inspection: Strengthen the inspection and control of the uniformity of tungsten wire resistance during the production process to ensure that the product quality meets the standards.
Reasonable circuit design: Consider the resistance characteristics of tungsten wire in circuit design, and reduce the problem of uneven current distribution through appropriate circuit layout and component selection.
More details of tungsten wires, please visit website: http://tungsten.com.cn/tungsten-wires.html
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Email: sales@chinatungsten.com
Tel.: +86 592 5129595
