超薄非晶软磁合金的制备与软磁特性研究

With excellent soft magnetic properties and characteristics, ultra-low iron loss, high sensitivity, and high saturation magnetization, the Ultra-thin amorphous soft magnetic alloy ribbon (UASMA) was widely used in the field of amorphous transformers, transformers and micro-magnetic sensors. Currently, the thickness of the conventional amorphous soft magnetic alloy ribbon, which was widely used in the above-mentioned areas, was between 25-40 μm. However, there existed a huge upgrade space to further improve the soft magnetic properties: the saturation magnetization, the coercivity, the initial permeability. The ultra-thin of the amorphous soft magnetic alloy can significantly improve the soft magnetic properties. But the production process of the UASMA was very complicated, and it was need to perfect the physical properties and heat treatment technologies of the UASMA. The perfect UASMA with excellent soft magnetic properties can be produced by the innovation of composition and process. In this project, a new composition alloy was used to product the new UASMA by the high-speed rotating block flow casting technology，which was optimized to improve stability of the technology, through mass production experiments. And then, the soft magnetic properties and performance stability of the new UASMA was improved by the complex heat treatment process. It will be a solid theoretical foundation for the industrialization of the Ultra-thin amorphous soft magnetic alloy ribbon.

超薄非晶软磁合金薄带具有优异软磁性能、超低铁损、高灵敏度等特性，在非晶变压器、互感器、微磁传感器等领域应用非常广泛，目前应用最多的非晶软磁合金薄带厚度在25-40μm之间，其饱和磁化强度、矫顽力、起始磁导率等软磁性能仍有巨大的改善空间。非晶软磁合金带材的超薄化能进一步改善软磁合金的相关软磁性能，但超薄非晶软磁合金薄带制备工艺异常复杂，相关物理性能和热处理技术研究尚待完善。而通过成分、工艺创新能够制备出软磁性能优良的超薄非晶软磁合金带材。本项目拟采用新型合金体系，通过大量参比试验对块体高速旋转流动铸造技术制备工艺进行技术优化，以提高工艺稳定性，制备出新型超薄非晶软磁合金薄带，再通过复合热处理工艺提高新型超薄非晶软磁合金薄带的软磁性能和性能稳定性，为超薄非晶软磁合金薄带的产业化而打下坚实的理论基础。

针对能源、航天﹑航空﹑交通﹑运输﹑通讯领域等对超薄非晶软磁合金的需求背景，突破了超薄非晶软磁合金的制备和热处理等关键技术。通过发展和完善非晶软磁合金带材的成分设计、母合金熔炼等工艺实现了母合金均匀化，并提出了新的超薄带制备工艺，通过模拟仿真和实验提高工艺稳定性，确定最佳工艺参数，研制出了性能优良、最小厚度在15 μm的新型超薄非晶软磁合金带材。探索了超薄非晶软磁合金带材的热处理新工艺，以提高了超薄非晶软磁合金带材的软磁性能。了解了超薄非晶软磁合金带材的微观磁畴结构、软磁性能等基本特征，熟悉了磁畴结构与软磁性能、性能稳定性的关系，改善了超薄非晶软磁合金带材物理特性，制备出综合性能更优的超薄非晶软磁合金带材，为超薄非晶软磁合金在国内电力电子等尖端领域中的应用打下坚实的科学基础。