37+ Iron Carbon Diagram Explanation Pics . The diagram shows three horizontal lines which indicate isothermal reactions. Describes iron carbon steel alloys, the effects of cooling rates on their strength; Please answer the following question regarding the iron ... from study.com A detailed information about iron carbon phase diagram with eutectoid, eutectic,peritecti, peritectoid phase transformations are presented in a detailed way. Prevention of grain boundary cementite formation during hot rolling of wire rods of high carbon in steel wire rods with carbon content more than the eutectoid composition, proeutectoid cementite forms along the grain boundaries prior to the. Phases are physically homogeneous states of an alloy. This concerns the changes which take place when austenite cools. Iron carbon equilibrium diagram, critical temperature lines, phase changes, curie temperature. .di...