由中合金钢开发的铁基非晶合金及其磁粉芯软磁性能研究

发布时间：2018-04-26 04:01

本文选题：合金钢 + 铁基非晶　；参考：《郑州大学》2017年硕士论文

【摘要】：Fe基非晶软磁材料具有高饱和磁感应强度(Bs)、高磁导率(μe)和低矫顽力(Hc)等优异的综合软磁性能,是一种很有应用前景的新型磁性材料。目前,钢铁产能过剩,在国内去产能,加快发展新材料的大背景下,本文针对中合金钢成分特点开发出新型Fe基非晶软磁合金,同时考察了Ni、Cr和Co三种典型合金元素对非晶合金软磁性能的影响。在此基础之上,选用综合软磁性能优异的新型非晶带材制成非晶粉末,探索新型非晶磁粉芯的制备工艺,以期拓宽其应用。围绕这一课题本文主要展开以下几方面的研究工作:(1)利用合金钢开发出新型非晶合金,并研究了其软磁性能。在合金钢Fe_(92.27)_(1.43)C_(0.14)Mn_(0.58)P_(0.15)Cu_(0.03)Mo_(0.01)Ni_(1.51)Cr_(3.75)Co_(0.13)(at%,标注为S0)的成分基础上,以目前广泛使用的铁基非晶合金Fe80Si9B11为目标,通过添加Fe、Si和B等廉价元素调整合金成分,利用熔体快淬法制备出非晶带材Fe_(75.1)Si_(8.9)Cu_(0.03)Mo_(0.01)Mn_(0.47)B_(10.87)C_(0.11)P_(0.12)Ni_(1.23)Cr_(3.05)Co_(0.11)(at%,标注为S1),采用XRD、DSC、VSM、直流B-H磁滞回线测量仪和阻抗分析仪等分别测试了非晶带材的微观结构、热稳定性和磁性能(Bs、μe和Hc)等。结果表明:非晶带材S1的Bs=1.45 T、μe=22846.96(f=1 kHz时)和Hc=1.033 A/m。(2)考察了主组元Ni、Cr和Co元素对非晶合金Fe_(75.1)Si_(8.9)Cu_(0.03)Mo_(0.01)Mn_(0.47)B_(10.87)C_(0.11)P_(0.12)Ni_(1.23)Cr_(3.05)Co_(0.11)(at%,标注为S1)的微观结构、非晶形成能力、热稳定性和磁性能的影响,同时开发出两种新型非晶合金。通过单独或组合添加Ni、Cr和Co元素调整成分,设计出七种新型合金成分,通过熔体快淬法制备出了七种表观质量良好的合金带材。其中包含两种软磁性能优异的非晶合金Fe_(78.55)Si_(9.31)Cu_(0.02)Mo_(0.01)Mn_(0.49)B_(11.37)C_(0.12)P_(0.13)(at%,标注为E1)和Fe_(78.46)Si_(9.3)Cu_(0.02)Mo_(0.01)Mn_(0.49)B_(11.36)C_(0.12)P_(0.13)Co_(0.11)(at%,标注为E4),其余合金带材(分别标注为E2、E3、E5、E6和E7)均有不同程度的晶化。结果表明:单独或组合添加Ni、Cr和Co不仅影响合金的非晶形成能,也不同程度地影响非晶合金的μe和Bs。其中,E1的Bs=1.62 T、μe=6403.59(f=1 kHz时)和Hc=0.053 A/m。E4的Bs=1.67T、μe=8351.66(f=1 kHz时)和Hc=0.04 A/m。(3)以性能优异的Fe_(78.46)Si_(9.3)Cu_(0.02)Mo_(0.01)Mn_(0.49)B_(11.36)C_(0.12)P_(0.13)Co_(0.11)(at%,标注为E4)为原材料制备非晶粉末,然后开发出新型磁粉芯。在(2)的研究成果基础上,E4非晶带材经真空去应力退火脆化处理之后,采用机械球磨法,在大气下制备出完全非晶态的磁性粉末。非晶粉末经过钝化、绝缘包覆、粘结固化、冷压成型和去应力退火等过程制备出非晶磁粉芯。结果表明:非晶磁粉芯的μe达到12.7(f=1 kHz时),Bs达到1.0 T以上,直流偏置特性优异,在f=100 kHz,外加直流偏置场强度达到120 Oe时,μe仍达到90%以上,并且能够在10 MHz甚至更宽频率范围内保持稳定。本论文的创新之处在于首次采用中合金钢开发出具有良好软磁性能的非晶合金,而且在大气条件下可以制备出完全非晶态的软磁粉末,具有重要的现实意义。
[Abstract]:Fe based amorphous soft magnetic materials have excellent comprehensive soft magnetic properties, such as high saturation magnetic induction strength (Bs), high permeability (E) and low coercive force (Hc). It is a new magnetic material with promising application. At present, under the background of overcapacity in domestic and accelerating the development of new materials, this paper aims at the development of the composition characteristics of the medium alloy steel. A new type of Fe base amorphous soft magnetic alloy was produced, and the influence of three typical alloy elements of Ni, Cr and Co on the soft magnetic properties of amorphous alloys was investigated. On this basis, the amorphous powders with excellent soft magnetic properties were selected as amorphous powders, and the preparation of new amorphous magnetic powder core was explored in order to broaden its application. The main research works are as follows: (1) new amorphous alloys are developed with alloy steel and their soft magnetic properties are studied. On the basis of Fe_ (92.27) (1.43) C_ (0.14) Mn_ (0.58) P_ (0.15) Cu_ (0.03) Mo_ (0.01) Ni_ (1.51) Cr_ (3.75) Co_ (3.75) Co_ (3.75) Co_ (at%, S0), alloy steel is widely used as an iron base amorphous alloy Fe80S. I9B11 was used to adjust the alloy composition by adding Fe, Si and B, and the melt fast quenching method was used to prepare amorphous ribbon Fe_ (75.1) Si_ (8.9) Cu_ (0.03) Mo_ (0.01) Mn_ (0.47) B_ (10.87) C_ (0.11) P_ (3.05) 0.11 (3.05)). The microstructure, thermal stability and magnetic properties (Bs, e and Hc) of amorphous ribbons were not tested. The results showed that the Bs=1.45 T, e=22846.96 (f=1 kHz) and Hc=1.033 A/m. (2) of amorphous ribbons investigated the principal component Ni, and the elements to amorphous alloys (75.1) (0.03) (0.01), 10.87 (0.11) (0.12) (1.23) (1.23) The microstructure of Co_ (0.11) (0.11) (at%, labeled as S1), the effect of amorphous formation, thermal stability and magnetic properties, and the development of two new amorphous alloys. By adding Ni, Cr and Co elements in a separate or combined combination, seven kinds of new alloy components are designed, and seven kinds of alloy strip with good apparent quality have been prepared through melt quenching. Two kinds of amorphous alloys with excellent soft magnetic properties Fe_ (78.55) Si_ (9.31) Cu_ (0.02) Mo_ (0.01) Mn_ (0.49) B_ (11.37) C_ (0.12) P_ (0.13) (at%, 78.46) and Fe_ (9.3) Si_ (0.02) The results show that the addition of Ni, Cr and Co not only affect the amorphous formation energy of the alloy, but also affect the E and Bs. of the amorphous alloy to varying degrees, E1 Bs=1.62 T, f=1 kHz, and Hc=0.053 (78.46) (9.3). Cu_ (0.02) Mo_ (0.02) (0.01) (0.01) Mn_ (0.49) B_ (11.36) C_ (0.12) P_ (0.13) Co_ (0.11) (at%, as E4) was prepared for amorphous powder and developed a new magnetic powder core. On the basis of the research results of (2), E4 amorphous ribbons were treated by vacuum stress annealing embrittlement, and a completely amorphous magnetic powder was prepared by mechanical ball milling under the atmosphere. The amorphous powder core was prepared by passivation, insulation coating, bonding curing, cold pressing and stress annealing. The results showed that the micron core of the amorphous powder core was 12.7 (f=1 kHz), Bs reached 1 T, and the DC bias was excellent. When the intensity of the external DC bias field reached 120 Oe, the micron was still more than 90%. And it can be stable at 10 MHz or even wider frequency range. The innovation of this paper is that it is the first time to develop amorphous alloys with good soft magnetic properties by using medium alloy steel for the first time, and it is of great practical significance to produce completely amorphous soft magnetic powders in the atmosphere.

【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG139.8

【参考文献】