A L+8 0.53 Fe-FeC phase diagram 1538 4.1.1 Carbon B1495 8+ steel 1394 0.17 L+Y 1227 Temp. Content 1148 L+FeC of carbo F Meaning 2.11 4.3 C (wt%) Eutectic point G912 Y+Fe,C 1148 43 L+Y土FGd a+y The Maximum 0.77 727 E1148 2.1 solubility of carbon iny phase 0.02 912 0 a分Y Fe,C The Maximum 727 0.02 solubility of carbon a+Fe,C in a phase Eutectoid point 727 0.8 Hypoeutectic Hypereutectic Y+--ap+FesC White iron White iron Fe 3 6 6.69 Cwt% PDF文件使用"pdfFactory Pro" 试用版本创建www.fineprint.com.cng a+g A C D E F a Hypereutectic White iron 1148 G 912 727 2.11 4.3 Hypoeutectic White iron B 0.53 N 0.17 H 1394 1538 1495 d+g L+g L+d d a+Fe3C g+Fe3C Fe3C 0.77 Q P S L L+Fe3C K Fe 1 2 3 4 5 6 6.69 1227 C wt% 4.1.1 Carbon steel Fe- Fe3C phase diagram 0.02 P u r e ir o n H y p o e u t e c t oid s t e el H y p e r e ute ctoid Ste el Temp. (°C) Content of carbon (wt%) Meaning C 1148 4.3 Eutectic point LC←→ gE＋ Fe3C E 1148 2.1 The Maximum solubility of carbon in g phase G 912 0 a«g P 727 0.02 The Maximum solubility of carbon in a phase S 727 0.8 Eutectoid point g←→ aP ＋Fe3C S y m b ol PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn