Abstract:The 35Cr45Ni steel with the high service temperature of about 1150°C was wildly used in ethylene pyrolysis device. However, the structure of 35Cr45Ni steel will change greatly after it was in service for a long time at high temperature. Therefore, in this paper, focusing on the 35Cr45Ni furnace tubes with different service time (0 and 6 years, i.e. original sample and failed sample), the microscopic morphology and elemental composition analysis were carried out to determine its failure behaviour. The results s… Show more
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