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用Ｘ射线衍射、透射电子显微镜、数字图像分析等实验技术，系统研究了快淬制备的Ｆｅ７２．５Ｃｕ１Ｎｂ２Ｖ２Ｓｉ１３．５Ｂ９非晶条带经５００—７５０℃，０．５ｈ退火后合金的相组成、晶格参数和晶粒尺寸随退火温度的变化规律．结果表明，在５３０—５４５℃，退火０．５ｈ，电子数字定量金相测量得到的α－Ｆｅ纳米固溶相平均晶粒尺寸为１３．７－１４．９ｎｍ，当退火温度高于５６０℃时，晶粒长大速度显著增大；对α－Ｆｅ固溶相晶格参数的精确测量表明，晶格参数随退火温度升高而增大试样经５３０℃，０．５ｈ退火处理，可达到最佳软磁特性．这时，α－Ｆｅ（Ｓｉ；Ｖ）平均晶粒尺寸为１３．７ｎｍ；比Ｆｅ７３．５Ｃｕ１Ｎｂ３Ｓｉ１３．５Ｂ９最佳磁性对应的平均晶粒尺寸１０ｎｍ略高．随着退火温度升高，Ｖ更多地替代Ｓｉ，合金变脆，软磁性质也相应变坏．
The phase composition of the alloy after annealing at 500-750 ℃ for 0.5 h was systematically studied by X-ray diffraction, transmission electron microscopy and digital image analysis. Variation of parameters and grain size with annealing temperature. The results show that the average grain size of α-Fe nanocrystalline solid solution measured by digital quantitative metallography at 530-545 ℃ for 0.5h is 13.7-14.9nm, when the annealing temperature is higher than 560 ℃ , The grain growth rate increases significantly. The accurate measurement of the lattice parameters of the α-Fe solid solution phase shows that the lattice parameters increase with the increase of the annealing temperature. The samples annealed at 530 ℃ and 0.5h can reach Best soft magnetic properties. At this time, the average grain size of α-Fe (Si; V) is 13.7 nm; the average grain size of 10 nm is slightly higher than that of the best magnetic of Fe73.5Cu1Nb3Si13.5B9. As the annealing temperature increases, V replaces Si more and the alloy becomes brittle and the soft magnetic properties deteriorate accordingly.