Surface defects of tungsten wire have a significant influence on its life. The following is a detailed analysis of this influence:
- Types of surface defects
Tungsten wire may produce a variety of surface defects during processing and use, which mainly include:
Mechanical damage: such as tiny delamination, cracks, splitting, protrusions and pits. These defects may be caused by mechanical stress or improper operation during processing.
Surface contamination: The surface of tungsten wire may be contaminated with certain harmful metals or compounds, such as nickel, phosphorus, etc. These contaminants may be introduced during processing or storage.
- The influence of surface defects on the life of tungsten wire
Reduced mechanical strength:
Mechanical damage such as cracks and pits may become stress concentration points, causing tungsten wire to break more easily when subjected to external forces.
Over time, these defects may gradually expand, further weakening the mechanical strength of tungsten wire.
Affect heat conduction and heat dissipation:
Surface defects may cause the thermal conductivity of tungsten wire to decrease, causing heat to accumulate locally, thereby accelerating the aging and damage of tungsten wire.
Defects may become hot spots, resulting in excessive local temperatures, which in turn cause the tungsten wire to melt or evaporate.
Promote oxidation and corrosion:
Harmful metals contaminated on the surface may react chemically with tungsten to form oxides or compounds, thereby accelerating the corrosion and aging of tungsten wire.
These chemical reactions may generate additional heat, further exacerbating the damage of tungsten wire.
Shorten service life:
In summary, surface defects will cause the mechanical strength of tungsten wire to decrease, thermal conductivity to be impaired, and oxidation and corrosion to be accelerated. These factors work together to significantly shorten the service life of tungsten wire.
- Methods to reduce surface defects
In order to reduce the surface defects of tungsten wire and extend its service life, the following measures can be taken:
Optimize processing technology:
Use more sophisticated processing methods and equipment to reduce the occurrence of mechanical damage.
Strictly control the processing process to ensure standardized operation and stable quality.
Strengthen surface cleaning and treatment:
Thoroughly clean the tungsten wire before processing and use to remove surface dirt and contamination.
Use appropriate surface treatment methods, such as electrolytic cleaning, to further improve the surface condition of the tungsten wire.
Improve storage conditions:
Ensure that the tungsten wire is not affected by adverse factors such as moisture and oxidation during storage.
Strictly control the storage environment, such as temperature and humidity, to extend the shelf life and service life of the tungsten wire.
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