111 加熱炉管浸炭の現地非破壊評価法について(OS7-(3) 材料損傷の機構・実験評価,オーガナイズドセッション)

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  • 111 On-site non-destructive evaluation of carburized 9Cr-1Mo steel furnace tube

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Carburization evaluation of 9Cr-1Mo steel furnace tube of the CCR (Continuous Catalyst Regeneration Reformer) is an important technology which is required for the safe and stable operation of petrochemical plants in long term. Application of the nondestructive evaluation to determine the inside and outside carbon density distribution were examined by combining both the magnetic measurement method (Non-Linear Harmonics (NLH) method) for total carbon density of thickness and portable optical emission spectroscopic analysis equipment for outer surface carbon density. As the result, it is thought that an individual estimation of the inside and outside carburization is possible by this nondestructive evaluation method.

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