The features of AC arc burning. The diagrams of currents and voltages for the AC arc.
It should be noted that all the properties of the DC arc are inherent in the AC arc. When the arc burns at the alternating current of 50 Hz, there are condition...
Category: To become an Inspection Engineer
The amount of metal evaporating from the cathode spot (Part 2).
At present, it is considered that the value of the ion fraction of the current in the welding arcs is approximately β ≈ 0.5. Assuming that the value of β does n...
Tests to determine the chemical properties.
Earlier we considered those types of tests that allow us to know the mechanical properties of metals. The metals also have important chemical properties. In fac...
The power supply classification features. The potential distribution in the arc. The welding arc properties (Part 2).
The studies have shown that the extent of the cathode and anode zones of the arc is very small: : lк = 1·10-5 см; lа = 1·(10-3…10-4) cm. Then the length of t...
The amount of metal evaporating from the cathode spot (Part 1).
When welding with the direct polarity, the dimensions of the anode spot determine the width of the weld. At the same time, at the given current and voltage, on ...