Magnetic strips and methods for making the same

Details Magnetic strips and methods for making the same Magnetic strips and methods for making the same

1995-02-27

1996-06-18

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148121, H01F 1147, H01F 4102

Patent

active

055273998

ABSTRACT:
Methods for preparing magnetic strips are provided in which the strips are manufactured to a thickness of less than about 0.005 inches and are made of a ferrous alloy having a carbon content of from about 0.4 to about 1.2 weight percent. The strips can be prepared by first manufacturing an alloy having a carbon content below about 0.5 weight percent to the desired thickness and then subjecting the strip to a carburizing step to raise the carbon content in the strip. The strips can also be prepared by controlling the chemistry of the initial alloy and controlling the processing of that alloy until the desired thickness and requisite magnetic properties are obtained. The strips are particularly useful in EAS systems.

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