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http://dx.doi.org/10.4283/JKMS.2006.16.4.211

Correlation Between Mechanical and Magnetic Properties for Cold Rolled Carbon Steel Sheet  

Park, S.Y. (KRISS Div. of Physical Metrology)
Ryu, K.S. (KRISS Div. of Physical Metrology)
Yi, J.K. (POSCO Technology Development department)
Park, J.S. (KRISS Div. of Metrology for Quality Life)
Publication Information
Journal of the Korean Magnetics Society / v.16, no.4, 2006 , pp. 211-215 More about this Journal
Abstract
Measurement methods in order to measure the mechanical properties nondestructively have been studied. The mechanical properties of the structural and turbine rotor steels are related with their magnetic properties. If the magnetic properties of the cold rolled carbon steel sheet (CR) for a car are measured nondestructively, its mechanical properties are analogized by their magnetic properties. And then the mechanical properties are monitored on-line by measuring the magnetic properties. We prepared three CR materials, CBQ 3060, CBQ 3041, and CBQ 3036, were prepared in order to measure their mechanical and magnetic properties. The Vickers hardness,yield strength, and tensile strength were measured by ASTM E 8M, and the reversible magnetic permeability was measured by the surface type probe. The coercivity calculated by the peak interval of reversible magnetic permeability increased linearly with the increase of Vickers hardness, yield strength, and tensile strength. The amplitude of the peak interval of reversible magnetic permeability drastically decreased when the lift-off was increased.
Keywords
cold rolled carbon steel sheet; mechanical property; magnetic property; reversible magnetic permeability; coercivity; Vickers hardness;
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