《机械制造基础》课程教学资源（课件讲稿）第4章 钢的热处理（图片，PPT）

第四章钢的热处理

◆第四章 钢的热处理

温度℃L+8HAB115008LA14001300L+A8+AD1200L+Fe,CtCEA11001000A+Fe,CG900F+A800F-K700PS600Q500F+Fe,C400300200100654321Fewc/%Fe-Fe,C相图图5-1

温度/℃CAHB15008V14001300L+A8.1D1200L+Fe,CFCE11001000A+Fe,CG900FtA800F-K700P6000500F+Fe,C40030020010065234Fe1wc/%Fe-Fe,C相图图5-1

温度℃L+8HAB15008A14001300L+A8+AD1200L+Fe,CEA11001000A+Fe,CG900F+A800F-K700PS6009500F+Fe,C40030020010056432Fe1Wc/%Fe-Fe,C相图图5-

EAAC3ACcmA3GAcmAr3Arcm-A+FesF+A2SACArAP+FP+FUwc0

未溶Fe,C未溶Fe,C(a)A形核(b)A长大(d)A均匀化（c）残余Fe，C溶解图6-2珠光体向奥氏体转变过程示意图

本质粗晶粒钢8本质细晶粒钢1C900~950℃Ac1温度图6-3钢的本质晶粒度示意图

(b)(a)(d)(c)(f)(e)(h)(g)图6-4标准的晶粒度等级示意图

babsb,bebab100%/3(a)50转a0a0-43E800asiail700abb2600ab500C二400a6度琪300M,(b)2001000M-100104101010°0.5110时间/s

(a)(b)(c)(d)(e)(f)图6-6片状珠光体形成示意图