Magnaflux Testing of Driving Wheels

The driving wheel centers for the WC&C #1 were tested for cracks using the Magnaflux process. Heavy cable was coiled around the section of the wheel to be tested. It was then connected to a very large machine similar to a welder. The area to be checked is then sprayed with an indicator which contains fluorescent iron particles. The machine then passes a very large electrical current through the wire to set up a magnetic field in the coil as well as the iron it is coiled around. If there are any cracks in the material, a flux leakage occurs which creates a disturbance in the magnetic field similar to two separate magnets being very close together. The iron particles are attracted to the flux leakage just like the end of a magnet. A very high power ultraviolet light is then shone on the area. If any cracks are present, the concentration of the fluorescent iron particles at the crack are extremely easy to see. The results? A few cracks were detected and final analysis will be determined by the General Foreman of Running Gear.

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