Improving the lifetime of tungsten electrode is an important link to ensure the stability and welding quality of argon arc welding. The following aspects are particularly critical to extending the service life of tungsten electrodes:
Reasonable Selection of Electrode Type and Specification
Choose the appropriate tungsten electrode type (such as thorium tungsten, lanthanum tungsten, cerium tungsten, etc.) and diameter according to the welding process (DC, AC), welding material and current to avoid electrode overload ablation.
Correct Sharpening
The electrode head should be ground into a suitable sharp corner or spherical shape according to the welding requirements, keeping it smooth and burr-free, ensuring that the arc is concentrated and stable, and reducing local overheating and ablation.
Maintains Protection Gas Flow And Purity
The argon gas flow rate should be moderate, generally between 8~15 L/min, to ensure sufficient protection of the electrode and welding area, and prevent oxidation and contamination. Use high-purity gas to avoid damage to the electrode surface caused by impurities.
Avoid Contamination Of The Electrode Head
It is strictly forbidden to touch oil, welding slag or other impurities during the welding process. Contamination can cause arc instability and tungsten inclusions, damaging the electrode surface.
Reasonable Control Of Welding Current And Parameters
Avoid excessive current or long-term continuous high-load welding to prevent rapid ablation and deformation of the electrode.
Use The Appropriate Arcing Method
When using high-frequency arcing or contact arcing, pay attention to avoid excessive contact between the electrode head and the workpiece to reduce the damage to the end.
Regular Maintenance And Inspections
Regularly check the condition of the electrode tip, resharpen or replace it in time, and avoid using electrodes with severe ablation or contamination.
Avoid Mechanical Damage
Handle and handle gently during installation and operation to prevent bending, breakage, or damage to the ends.
Through scientific and reasonable material selection, grinding, welding operation and maintenance, the service life of tungsten electrodes can be significantly extended, and the welding efficiency and quality can be improved.
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