Changes in material characteristics of pyrolysis furnace tube coils

Authors

  • N. A. Makhutov
  • A. G. Chirkova
  • M. I. Kuzeev

Abstract

Tube coil of hydrocarbon pyrolysis furnace result-ing in aggregate failures have been considered. It is shown that with the appearance of the cracks non-magnetic high-alloyed grade of Cr-Ni steel reveals magnetic properties. Changes in mechanical properties coil during operation have been studied and extreme operation time relationships have been obtained. To analyse the changes in metal struc-ture involving failures multifractal parameterization meth-ods were applied. It is shown that the changes in mechani-cal properties are connected with the evolution of sigma-phase and other intermetallic compounds arising in service.

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Published

2006-04-10

Issue

Vol. 58 No. 2 (2006)

Section

Articles

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The copyright for the articles in this journal is retained by the author(s) with the first publication right granted to the journal. The journal is licensed under the Creative Commons Attribution License 4.0 (CC BY 4.0).