Conclusions
The increase in the wear resistance of gray cast irong after low-temperature cyaniding in molten urea and soda is due to the saturation of the surface with nitrogen and carbon. A substantial increase in the wear resistance is obtained for cast iron containing aluminum, which results in the formation of nonbrittle ε phase and high microhardness of the base metal in the zone saturated with nitrogen below the carbonitride layer.
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Literature Cited
R. Jack. Proc. Roy. Soc.,195-A (1949).
K. Jack, Nature,158, No. 4002 (1946).
V. K. Thomas, Zavod. Lab., No. 4 (1965).
Additional information
All-Union Scientific-Research Institute of Textile and Light Machine Construction. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 52–53, January, 1972.