Quality control of welds and spot welding

25.11.2020 23:38

Pre -cleaned of spray, plaque and slag, the seams are controlled by external inspection and measurements and measuring instruments.

The method of monitoring arc weld joints of particularly crucial structures by casting seams in suspicious places is currently replaced by other, more advanced ways, of which the most common are the following: a) translucent with x -rays; b) the use of magnetic powders and suspensions of magnetic powder and light mineral oil or kerosene (iron powder, ground iron scale, etc.), which are applied in a controlled controlled welded structure magnetized by an electromagnetic way; c) the use of electromagnetic flaw detectors equipped with a phone or galvanometer, which respond to a change in the uniformity of the seam; d) the use of ultrasound flaw detectors equipped, for example, an electron -rairing tube with a luminous screen on which you can see the presence and location of the seam defect.