The test of the ablation rate of tungsten electrode is usually carried out by the following methods:
1.Gravimetric Method
Under certain welding conditions (such as current, voltage, gas flow rate, and time), the initial mass of the tungsten electrode is weighed first.
After a period of standard welding, the electrode is removed, the surface impurities and oxides are cleaned, and the mass is weighed again.
The ablation loss of the electrode is calculated by the mass difference to obtain the ablation rate.
2.Length Method
Record the length of the tungsten electrode before welding.
After welding a certain time or welding a certain length of weld according to the fixed welding process parameters, the remaining length of the electrode is measured.
The length of electrode consumption is calculated, combined with the welding time, to obtain the ablation rate.
3.Microscopic Observation
Use a microscope to observe the wear pattern and erosion depth of the electrode tip surface.
The ablation rate is analyzed qualitatively or quantitatively by comparing the microstructural changes before and after ablation.
Arc stability combined with performance testing
In the actual welding process, the electrode ablation is indirectly reflected by monitoring the arc stability and welding quality changes.
Generally speaking, the ablation rate is greatly affected by the welding current, gas protection quality, electrode type and usage conditions, and the parameters should be strictly controlled during the test to ensure accurate and reliable results.
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