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采用Ｘ射线衍射、电子衍射及透射电子显微技术研究了Ｆｅ７３．５Ｃｕ１Ｍｏ３Ｓｉ１３．５Ｂ９非晶合金４１００Ｃ预退火对随后４８００Ｃ退火所形成的纳米晶结构的影响。结果表明，预退火对Ｆｅ７３．５Ｃｕ１Ｍｏ３Ｓｉ１３．５Ｂ９合金纳米晶结构的形成有重要影响。当预退火时间从０小时增加至３小时，合金在４８００Ｃ、１小时退火形成的晶化相αＦｅ（Ｓｉ）的晶粒尺寸从１５ｎｍ减小至８ｎｍ。预退火使αＦｅ（Ｓｉ）相的形核数量及体积分数增加。将Ｆｅ７３．５Ｃｕ１Ｍｏ３Ｓｉ１３．５Ｂ９非晶合金在４３００Ｃ预退火４小时，然后在５１００Ｃ退火１０分钟，制备出了晶粒尺寸为１０ｎｍ的纳米晶Ｆｅ７３．５Ｃｕ１Ｍｏ３Ｓｉ１３．５Ｂ９合金，它具有最高起始磁导率（９．８×１０４）。
X-ray diffraction, electron diffraction and transmission electron microscopy were used to study the effect of 4100C pre-annealing of Fe73.5Cu1Mo3Si13.5B9 amorphous alloy on the nanocrystalline structure formed by 4800C annealing. The results show that pre-annealing of Fe73.5Cu1Mo3Si13.5B9 alloy nanocrystalline structure has an important impact. When the pre-annealing time increases from 0h to 3h, the crystallite size of α-Fe (Si) crystallized from the annealed alloy at 4800 ℃ for 1 hour decreases from 15nm to 8nm. Pre-annealing α-Fe (Si) phase nucleation number and volume fraction increase. The Fe73.5Cu1Mo3Si13.5B9 amorphous alloy was pre-annealed at 4300C for 4 hours and then annealed at 5100C for 10 minutes to prepare a nanocrystalline Fe73.5Cu1Mo3Si13.5B9 alloy having a grain size of 10 nm and having the highest initial permeability ( 9.8 × 104).