Abstract
DURING an investigation on the heat treatment of mild steel in raw town-gas and ammonia atmospheres1 an unidentified constituent was observed in the surface layers which appeared as a dark-coloured phase visible in the unetched condition. This phase is unstable at room temperature and can be eliminated by slow cooling or reheating. With the limited information available at the time the constituent was presumed to be an iron-carbon-nitrogen compound; positive identification has not been possible until now.
Similar content being viewed by others
Article PDF
References
Howes, M. A. H., and Mitchell, E., J.I.S.I., 187, 177 (1957).
Vernon, W. H. J., Wormwell, F., and Nurse, T. J., J. Chem. Soc., 621 (1939). Vernon, W. H. J., Wormwell, F., and Nurse, T. J., J.I.S.I., 150, 81 (1944). Nurse, T. J., and Wormwell, F., J. App. Chem., 2, 550 (1952).
Clark, E. R., and Farrell, B., (private communication).
Sachs, K., and Jay, G. T. F., J.I.S.I. (193 (1), 34 1959).
Jack, K. H., Acta Cryst. 5, 404 (1952).
Jack, K. H., Proc. Roy. Soc., A, 195, 34 (1948).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
HOWES, M., JAY, G., SACHS, K. et al. Identification of the High-Temperature Constituent in Mild Steel Surface-Hardened by Carbo-Nitriding. Nature 184, 1312 (1959). https://doi.org/10.1038/1841312a0
Issue Date:
DOI: https://doi.org/10.1038/1841312a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.