3751.     YAP, C. P.  Influence of Dissolved Carbide on the Equilibria of the System:  Iron-Carbon.  Am. Inst. Min. and Met. Eng., Tech. Pub. 382, 1931, 19 pp.; Chem. Abs., vol. 25, 1931, p. 1148.

        Previously published data on the Fe-C diagram are used to discuss the shape of the solidus.  The straight solidus is obtained by cooling a sample from the melt, whereas the curved solidus is obtained by heating samples that have already reached room temperature.  Fe3C exists as a structurally stable phase that the austenite must redissolve.  This leads to the conclusion that within a certain range of temperature the C in solution in austenite must be in the form of a carbide.