3146.     SCHWARTZ, H. A., JOHNSON, H. H., AND JUNGE, C. H.  Graphitization of Prequenched White Cast Iron.  Trans. Am. Soc. Steel Treating, vol. 17, 1930, pp. 383-399; Chem. abs., vol. 24, 1930, p. 5272.

        Study of the acceleration of graphitization produced by prequenching hard Fe before annealing.  The reactions involved are interfacial in character and represent the rate of solution of Fe₃C in the metallic matrix.  Prequenching accelerates migration of C rather than diffusion, because of a greatly increased number of graphite nuclei with the accompanying decrease in migratory distance.