Method and apparatus using magnetic flux scanning to test grain

Details Method and apparatus using magnetic flux scanning to test grain Method and apparatus using magnetic flux scanning to test grain

1992-03-19

1994-07-05

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324262, G01N 2772, G01R 3312

Patent

active

053270835

ABSTRACT:
The grain structure of electrical steel strip is tested by inducing a magnetic flux field into the strip by pole pieces at opposite sides of a permanent magnet. A magnetic detector head between the pole pieces responds to the leakage of flux as the steel strip and/or magnetic detection undergoes relative movement. A recorder is used to identify banding and mixed grain structures which cause a smaller flux leakage amplitude than larger desired grains.

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