CPC G01N 27/83 (2013.01) | 10 Claims |
1. A magnetic flaw detection method comprising:
a magnetization step of moving a magnet in a predetermined direction along a surface of an object that is a magnetic body and subsequently removing the magnet from the surface of the object to magnetize a region corresponding to a movement range of the magnet on the object;
a sensor arrangement step of arranging a magnetic sensor to be capable of measuring magnetic flux leakage generated from an abnormal portion of the region that was magnetized in the object after the magnet is separated from the surface of the object to an extent that a magnetic field generated from the magnet does not have a magnetic effect on the object; and
a detection step of detecting an abnormality in the region with the magnetic sensor arranged by the sensor arrangement step.
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