Abstract
Proposal of Thickness Inspection Method of Opposite-side Nickel Layer on Nickel-coated Steel Plate Using Pulsed Magnetic Field
Highlights
There is a rolling process for paper in a paper mill
The detailed phenomenon of the inspection method is examined by the 3D nonlinear finite element method (FEM)(6) considering the hysteresis magnetization curves of both nickel and the mother steel (SS400 steel) in the nickel-coated steel plate
(2) The behavior of flux density inside the nickel-coated steel plate in the thickness inspection method of the nickel layer on the opposite side using the pulsed magnetic field is calculated by 3D nonlinear FEM considering the hysteresis magnetization curve
Summary
There is a rolling process for paper in a paper mill. In the rolling process, nickel-coated steel is used in a large rolled steel plate. It is necessary to inspect the thickness of the nickel layer during the production process to guarantee quality.[1,4] In a real manufacture plant, the thickness of the nickel layer on the opposite side of a rolled steel plate should be inspected. An X-ray measurement method[5] is generally used for thickness inspection on that side. X-rays do not permeate up to the nickel layer on the opposite side of a thick rolled steel plate. The thickness of the nickel layer can be estimated on the basis of the differences in these electromagnetic properties. An electromagnetic inspection method for measuring the thickness of the nickel layer on the opposite side of a nickel-coated steel plate using a pulsed magnetic field is proposed.
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