Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Reexamination Certificate
2005-05-17
2005-05-17
Thibodeau, Paul (Department: 1773)
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
C148S120000, C428S611000, C428S692100
Reexamination Certificate
active
06893511
ABSTRACT:
The invention relates to a semi-hard magnetic material having rectangular hysteresis loop and superior magnetization steepness and a method of producing a bias material preferably used for a magnetic marker. This method comprises the steps of preparing a multilayer clad material in which layers “A” each containing Fe as the main component thereof and layers “B” containing as the main component thereof a Cu group metal are diffusion-bonded, heating the multilayer clad material, subjecting the material to a dividing treatment, and applying cold working thereto. By this method, it becomes possible to obtain the semi-hard magnetic material having high squareness ratio and superior magnetization steepness, and to obtain the bias material for the magnetic marker.
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Kawakami Akira
Nakaoka Noriyuki
Yamada Hideya
Bernatz Kevin M.
Hitachi Metals Ltd.
Thibodeau Paul
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