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Journal of Materials Engineering and Performance

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01-07-2013

Development of Nitrogen-Hydrocarbon Atmospheric Carburizing and Process Control Methods

Authors: Xiaolan Wang, Zbigniew Zurecki, Richard D. Sisson Jr.

Published in: Journal of Materials Engineering and Performance | Issue 7/2013

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Abstract

Atmospheric pressure carburizing and neutral carbon potential annealing in nitrogen containing small additions of hydrocarbon gases can offer cost and steel surface quality alternatives to the comparable, endothermic atmosphere, or vacuum operations. An experimental program was conducted for refining real-time process control methods in carburizing of AISI 8620 steel under N₂-CH₄, N₂-C₃H₈ blends containing <5 vol.% of hydrocarbon gas at 900 and 930 °C. Multiple types of gas analyzers were used to monitor residual concentrations of H₂, CO, CO₂, H₂O, O₂, CH₄, C₃H₈, and other hydrocarbons inside furnace. A modified shim stock technique was additionally evaluated for correlation with gas analysis and diffusional modeling using measured carbon mass flux values (g/cm²/s). Results of this evaluation work are presented.

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Title: Development of Nitrogen-Hydrocarbon Atmospheric Carburizing and Process Control Methods
Authors: Xiaolan Wang
Zbigniew Zurecki
Richard D. Sisson Jr.
Publication date: 01-07-2013
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 7/2013
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-012-0294-0

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