330.    BRAMLEY, A., AND LORD, H. D.  Equilibria Between Mixtures of Carbon Monoxide and Carbon Dioxide at Various Pressures in Contact With Steels of Different Carbon Concentrations at 750°-1,150°.  Jour. Chem. Soc., 1932, pp. 1641-1669; Chem. Abs., vol. 26, 1932, p. 5529. 

                   Equilibria between CO, CO₂, and steels of C contents varying from 0.1 to 2.0% have been measured at temperatures of 750°-1,150° by means of a static method.  Results indicate that C in austenite is in the form of an equilibrium mixtures of monatomic C and Fe₂C.  The concentration of C in the gaseous mixture follows Henry’s law if the C vapor is considered monatomic.  At the 700°-1,100°, graphite is the stable form of C and not Fe₂C.  In the presence of graphite, further carburization will occur if the CO:CO₂ ratio is less than 1; if it is greater than 1, decarburization will occur.  In the equilibrium diagram, the graphite-solubility line is approximately parallel to the Fe₃C-solubility line and to the left of that of amorphous C.  Heats of formation were determined as follows:  Dissolved Fe₃C from 3Fe+2CO 29,950 cal.; precipitated Fe₃C from 3Fe+2CO 36,950 cal.; Fe₃C from y-iron and graphite –4,750 cal.; and Fe₃C from a-iron and graphite –6,950 cal. 

                   BRAMLEY, A., AND TURNER, G.  Gaseous Cementation of Iron and Steel.  IV.  Action of Mixtures of Carbon Monoxide and Ammonia on Iron and Steel and Its Bearing on the Process of Cementation.  See abs. 329. 

                  BRANTING, B. F.  See abs. 3209.