Interpretation of radiograph (Part 3).
Artefacts. Pressure marks (crimp marks). Produced by careless film handling – if the film is crimped or buckled either before or after exposure crescent-s...
Category: Inspection of Welded Seams
Interpretation of Radiographs (Part 2).
Film quality. The success of radiographic interpretation is dependent upon the quality of the film presented. If the film does not meet the minimum applicable s...
The definition of the technological properties concept and the requirements for it. The technical and economic indicators of power sources. The criterion for selecting power sources for welding.
When selecting power sources for welding, take into account technological and economic indicators. The choice of sources will ultimately be based on economic ca...
The amount of metal evaporating from the cathode spot (Part 2).
Since the total length of the cathode zone (the ionization zone and the free-motion zone of the ions adjacent to the cathode surface) is several mean free paths...
The power supply classification features. The potential distribution in the arc. The welding arc properties (Part 1).
The arc power supply is classified according to the following characteristics: by the current type: a) alternate current: transformers, elevated-frequencies gen...