| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel plate capable of forecasting a deformation amount caused by residual stress or the like of the steel plate after cutting when customers cut the steel plate with laser or gas capable of managing the transformation volume within a certain amount of permissible limits. SOLUTION: Temperature distribution of the surface of the steel plate 8 hot-corrected by a hot-correcting device 5 is measured by a temperature gauge 7. Next, residual stress distribution or the like is calculated from the temperature distribution of the steel plate 8 by a deformation predicting computer 18 or the like and a deformation or the distortion deformation amount is predictably calculated from the residual stress distribution or the like. Further, by comparing an allowable amount setup by the customer in accordance with the working condition with the deformation distortion or the deformation amount, the correction process is executed using a correcting device 10 and a heat treatment furnace 9 or the like to lower residual stress or the like if the given figures are out of permissible limits.
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