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第6期 曹佳丽等：退火后冷却方式对冷轧中锰钢微观组织和力学性能的影响 .743· (b) 2 um Mag-5.00KX EHT-20.00kVSignalA-InlensDate:190ct 201 WD=16.4mm Time9:31:16 5 um:Map5Step=0.05前：Grid463x348 0KX20gmlAn Date:2Now 2011 WD=15.5mm Time9:26:01 5 pm:Map3:Step=0.05:Grid463x48 图4 实验钢电子背散射衍射实验结果.(a)炉冷，选区：(b)炉冷，相分布：(c)空冷，选区：(d)空冷，相分布 Fig.4 EBSD analysis results:selected area (a)and phase distribution maps (b)of the furnace-cooled sample;selected area(c) and phase distribution maps (d)of the air-cooled sample (b) 500nm 200 60四 图5实验钢650℃退火5h后透射电镜组织形貌.(a)炉冷组织：(b)空冷组织：(c)奥氏体衍射斑：(d)奥氏体的层错与退火孪品 Fig.5 TEM images of samples after annealing at 650C for 5 h:(a)microstructure of the furnace-cooled sample;(b)microstructure of the air-cooled sample;(c)austenitic diffraction spot;(d)reverted austenite phase with stacking faults or annealing twins6 · 743 · 4 . (a) (b) (c) (d) Fig.4 EBSD analysis results: selected area (a) and phase distribution maps (b) of the furnace-cooled sample; selected area (c) and phase distribution maps (d) of the air-cooled sample 5 650 5 h . (a) (b) (c) (d) Fig.5 TEM images of samples after annealing at 650 for 5 h: (a) microstructure of the furnace-cooled sample; (b) microstructure of the air-cooled sample; (c) austenitic diffraction spot; (d) reverted austenite phase with stacking faults or annealing twins