Testing of Hardness on Long Rail Welded Joint by Means of Magnetic Barkhausen Noise Technique

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Abstract:

The experiment shows that the Magnetic Barkhausen Noise (MBN) signal strongly depends on the elastic deformation, heat treatment state of surface and microstructure of the material, etc. Using the MBN technology that rely on the material characteristics, MBN can be used for testing the surface hardness of 60kg/m U74 seamless rail made by China Harbin welded rail plant. And the testing result obtained by the MBN method is consistent with the results obtained by the Brinell hardness (HB) method. Consequently, this non-destructive testing technique will have a strong life and an extensive market.

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351-357

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January 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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