研究模拟CSP工艺试制Hi-B钢在不同冷轧压下率(73％、78％、83％、88％及93％)下对其初次再结晶退火(850℃,5 min)后织构的影响.使用Zeiss Axioplan金相显微镜观察组织,借助NOVA400 Nano SEM型场发射扫描电子显微镜进行微观织构EBSD(电子背散射技术)数据采集,利用二次萃取复型法制样并通过JEM-2100透射电子显微镜(TEM)及能谱仪(EDS)观察压下率为88％的初次再结晶样品中抑制剂析出情况.结果表明:Hi-B钢冷轧的最合适压下率约为88％,冷轧初次再结晶退火(850℃,5 min)后晶粒细小,组织良好,有一定的Goss晶粒,有利的{111)＜112＞织构含量较高和较多的∑9、∑3、∑5有利CSL晶界.抑制剂(主要为Cu2S)析出较多,平均尺寸大小约为50.15 nm,平均面分布密度约为1.54×109个/cm2.
The influences of different cold reduction ratios (73％,78％,83％,88％ and 93％) on textures after primary recrystallization (850 ℃,5 min) of Hi-B steel manufactured by stimulating CSP process were studied by Zeiss Axioplan optical microscope(OM),NOVA400 Nano field emission scanning electron microscope (SEM) and electron back-scattered diffraction (EBSD),JEM-2100 transmission electron microscope (TEM) and energy disperse spectroscopy (EDS) which specimen was made by the second extraction replica method.The results show that the suitable cold reduction ratio for Hi-B steel is 88％.The steel after primary recrystallization annealing has the following characteristics:more even microstructure,considerable contents of Goss and favorable {111 }＜112＞ texture,and many ∑9,∑3 and ∑ 5 CSL grain boundaries.Besides,diffusely distributed inhibitors are mainly composed of Cu2 S particles.The average size is 50.15 nm and the average distribution of surface density is 1.54× 109/cm2.
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