Eddy current flaw detection device
AssigneeHitachi Zosen Corporation
InventorsHiroaki Arai, Akihiro Shin, Takaaki Yamada, Hiroshi Azuma
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Abstract
The present invention provides a strong magnetic force and high heat resistance for a magnetic-field forming magnet that applies a magnetic field to a test object to be inspected by an eddy current flaw detection device. A magnetic-field forming magnet for applying a magnetic field to a test object includes a first magnet and a second magnet. The first magnet has a strong magnet force and the second magnet having higher heat resistance than the first magnet is attached to a near end of the first magnet, the end near the test object.
Claims5
An eddy current flaw detection device that generates eddy current on a test object and inspects a state of a surface of the test object by detecting a change of the eddy current, the eddy current flaw detection device comprising:
- a detection part for detecting the change of the eddy current;
- and
- a magnetic-field forming magnet that is disposed outside the detection part and applies a magnetic field to the test object,
- wherein the magnetic-field forming magnet includes:
- a first magnet, and a second magnet attached to one end of the first magnet so as to be adjacent to the test object, and
- the second magnet has a Curie temperature higher than a Curie temperature of the first magnet.
Dependencies are inferred from the claim text.