论文部分内容阅读
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 microstructure and mechanical properties of Hi-B steel simulated by CSP process after initial recrystallization annealing (850 ℃, 5 min) under different cold reduction rates (73%, 78%, 83%, 88% and 93% influences. Tissue was observed using a Zeiss Axioplan metallographic microscope, microstructured EBSD data acquisition was performed with a NOVA400 Nano SEM field emission scanning electron microscope, and sample preparation was performed with a quadruple extraction multiplex method and analyzed by a JEM-2100 Transmission Electron Microscope TEM) and energy dispersive spectrometer (EDS) were used to observe the precipitation of inhibitors in the primary recrystallized samples with a reduction of 88%. The results show that the optimum rolling reduction of Hi-B steel is about 88%. After cold-rolling primary recrystallization annealing (850 ℃, 5 min), the grain size is small and the structure is good with some Goss grains. The higher content of {111} <112> and the more Σ9, Σ3, Σ5 favorable CSL grain boundaries. The inhibitor (mainly Cu2S) precipitated more, with an average size of about 50.15 nm and an average surface distribution density of about 1.54 × 109 cells / cm2.