The impurity content in tungsten electrode materials has a significant impact on their performance, which is reflected in the following aspects:
Arc Stability
Impurities can alter the electrical and thermal conductivity of the tungsten electrode, leading to arc instability, manifested by difficulty arcing, arc runout, or extinguishing.
Mechanical Strength And Wear Resistance
Impurities may form inclusions or defects inside the material, reducing the mechanical strength of the electrode and increasing brittleness, resulting in easy breakage or faster wear during welding.
Melting Point and Thermal Stability
Certain impurities can reduce the local melting point of the tungsten electrode, affect its high-temperature resistance, lead to intensified ablation of the electrode tip, and shorten the service life.
Welding Quality
Impurities entering the electrode surface may cause uneven arcing, aggravate the pollution of the electrode part, and affect the weld formation and welding strength.
Processability
The high impurity content increases the hardness and brittleness of tungsten materials, affecting the difficulty and effect of sharpening and forming processing.
Therefore, maintaining high purity and low impurity content of tungsten electrode materials is a key requirement to ensure excellent electrode performance and welding quality. Strict control of impurity content during the manufacturing process is an important link to improve the stability and life of tungsten electrodes.
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