Intro to Austenite 图 上海充通大学 HAI JIAO TONG UNIVI 1538 AδL 1495℃ 1500 1394 Y+L 1227℃ 皇 1148℃ L+Fe C Mother of pearl 1000 912 Y+Fe C cm a+ 1727C(A) a +Fe,C 500 00.020.77 2.11 4.30 6.69 Fe Fe,C C Concentration/% Pearlite K.Chen 6 Phase diagram in equilibrium state y phase is stable at high-temperature range Point S:eutectoid point(0.77%) Point E:largest carbon concentration allowed in y(2.11%) Note:A1,A3,and Acm lines -Note:912°C,727°C,1148°C temperatures 6- Phase diagram in equilibrium state - γ phase is stable at high-temperature range - Point S: eutectoid point (0.77%) - Point E: largest carbon concentration allowed in γ (2.11%) - Note: A1, A3, and Acm lines - Note: 912°C, 727°C, 1148°C temperatures 6