The key to dealing with tungsten inclusions in welds is to start from two aspects: prevention and repair to ensure weld quality and structural safety. Specific methods include:
1.Preventive Measures
Proper selection and preparation of tungsten electrodes
Use the appropriate type (e.g., thorium tungsten, cerium tungsten) and diameter electrodes to keep the electrode tip sharp and free of cracks, avoiding end burrs and contamination.
Reasonable control of welding parameters
Adjust the appropriate current and gas flow to avoid overheating and melting of the electrodes. High-frequency arcing or boost arcing is used to reduce the direct contact between the electrode and the workpiece.
Guarantee the quality and flow of the protective gas
Pure high-pressure argon gas is used to ensure stable and sufficient gas flow to prevent oxidation and electrode ablation.
Standardize the operation technology
Keep an appropriate distance between the electrode and the workpiece to avoid the electrode contacting the melt pool. Steady action during welding to avoid arc runout.
2.Weld Repair
Sand or mill tungsten inclusions
For the weld part where tungsten inclusions have been found, use a grinder or milling machine to thoroughly clean the inclusion area to prevent cracks or faTIGue failure caused by inclusions.
Rework soldering
After cleaning, re-weld, pay attention to adjusting the process parameters to prevent inclusions again.
Non-destructive testing confirmation
Through non-destructive testing methods such as ray and ultrasound, it is confirmed that the inclusion area is cleaned and the weld quality is up to standard.
3.Equipment Maintenance
Regularly inspect welding equipment and gas supply systems to ensure good arc initiation performance and accurate gas flow.
Keep the working environment clean and reduce sources of pollution.
More details of tungsten electrodes, please visit website: http://tungsten.com.cn/tungsten-electrodes.html
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Email: sales@chinatungsten.com
Tel.: +86 592 5129595
