Effect of Carburizing on Microstructure and Weldability of 35Cr-45Ni-Nb Alloys in the Ethylene Heating Furnace

Chokchai Singhatham; Krittee Eidhed

doi:10.4028/www.scientific.net/AMM.848.39

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 848Effect of Carburizing on Microstructure and...

Effect of Carburizing on Microstructure and Weldability of 35Cr-45Ni-Nb Alloys in the Ethylene Heating Furnace

Abstract:

This paper presents the effect of carburizing phenomena on the microstructure and weldability of tube coils in the ethylene heating furnace. A tube coil material was used the Ni-base alloy grade 35Cr-45Ni-Nb. The specimens obtained from three different height levels of carburized tube were tested. The results from the SEM-EDS and microstructure analyses show that the carbon was concentrated in carburized tube and deposited in the solid solution and chromium carbide compound. The prediction of new weldability in the carburized tube with Ni_eq/Cr_eq ratio can be used for welding repair in petrochemical industry.

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Periodical:

Applied Mechanics and Materials (Volume 848)

Pages:

39-42

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.848.39

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Online since:

July 2016

Authors:

Chokchai Singhatham, Krittee Eidhed*

Keywords:

35Cr-45Ni-Nb Alloy, Carburizing, Coke Formation, Ethylene Furnaces, Weldability

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