Production method for semirigid magnetic material and...

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148/9, 317/29.8

H01F 1/04 (2006.01) B32B 15/01 (2006.01) C21D 8/12 (2006.01) H01F 1/00 (2006.01) H01F 1/14 (2006.01) H01F 41/30 (2006.01)

Patent

CA 2308204

A method of producing a semirigid magnetic material having a high rectangularity ratio and an excellent magnetizing steepness, and suitably a magnetic marker bias material, the method comprising the steps of heating a multilayer clad material formed by diffusion-joining a layer A mainly consisting of Fe with a layer B mainly consisting of a Cu group nonmagnetic metal, shredding the layer B, and then cold-plastic-forming the material, thereby making it possible to produce a semirigid magnetic material having a high rectangularity ratio and an excellent magnetizing steepness and a magnetic marker bias material.

L'invention porte sur un procédé de production d'un matériau magnétique semi-rigide ayant un rapport de rectangularité élevé et un excellent trempage magnétisant. Ce procédé permet de produire également, de manière appropriée, un matériau de polarisation de marqueur magnétique. Ce procédé consiste à chauffer un matériau plaqué multicouche obtenu par passage par diffusion d'une couche A comprenant principalement Fe avec une couche B comprenant principalement un métal non magnétique du groupe Cu, découper la couche B, et former à froid le matériau, ce qui permet de produire un matériau magnétique semi-rigide ayant un rapport de rectangularité élevé et un excellent trempage magnétisant, ainsi qu'un matériau de polarisation de marqueur magnétique.

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