过热度及深冷处理对铁基非晶带材性能的影响

发布时间：2018-01-14 10:30

本文关键词：过热度及深冷处理对铁基非晶带材性能的影响　出处：《沈阳工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：Fe-Si-B系列合金具有矫顽力低、磁导率高、加工性能好、成本低的特点,已被广泛作为磁学领域中的功能材料,其中牌号为1K101的Fe78Si9B13非晶合金带材已逐步替代硅钢片用于制造变压器的铁芯。在条带制备的过程中,随着工艺参数的变化材料的磁性能很不稳定,本文主要研究过热度、退火温度对Fe78Si9B13磁性能及其稳定性的影响,试图找到过热度和退火温度的对应关系,为工业生产提供借鉴。另外,深冷处理作为研究材料的一种重要热处理工艺,有利于提高材料的强度、韧性、耐磨性等性能,但深冷处理对非晶合金的影响研究甚少,本文研究了深冷处理对非晶合金性能的影响,对拓宽非晶合金的应用领域具有一定的意义。本文采用单辊急冷法制备了Fe78Si9B13非晶条带,以此为研究对象,对样品进行了退火处理和深冷处理,并利用硅钢测试仪和振动样品磁强计对合金的磁性进行检测,主要获得如下主要结论:(1)三个过热度下制备的Fe78Si9B13非晶合金及其经深冷处理12h、24h、48h和96h之后的样品经XRD检测均为完全非晶态;过热度的增大、深冷时间的延长均有利于提高非晶合金的过冷液相区宽度,提高热稳定性。(2)随着过热度的增大,玻璃转变温度Tg、晶化开始温度Tx、第一、二晶化峰的峰值温度Tp1,2,及对两个峰的面积积分得到的晶化焓ΔH均呈现出下降的趋势。且过热度的增大会导致非晶带材的性能稳定性和饱和磁感应强度降低,矫顽力和剩磁增大,适当的提高退火的温度有助于获得好的性能。(3)随着液氮深冷处理时间的延长,Fe78Si9B13非晶合金的晶化峰面积增大,晶化体积分数减小,饱和磁感应强度升高且Bs介于淬态和360-653K退火处理之间,Tg、Tx、ΔTx、Tp1.2均发生变化,并且过冷液相区宽度高于淬态样品。(4)深冷处理后合金样品180°对折不会发生断裂,且较深冷处理前韧性增加,随着深冷时间的延长,带材韧性增强。
[Abstract]:Fe-Si-B series alloys have been widely used as functional materials in the field of magnetism because of their low coercivity, high permeability, good processability and low cost. Among them, 1K101 Fe78Si9B13 amorphous alloy strip has been gradually replaced by silicon steel sheet for the manufacture of transformer core. In the process of strip preparation. The influence of superheat and annealing temperature on the magnetic properties and stability of Fe78Si9B13 is studied in this paper. This paper tries to find out the relationship between superheat and annealing temperature to provide reference for industrial production. In addition, cryogenic treatment is an important heat treatment process to study materials, which is helpful to improve the strength and toughness of materials. The effects of cryogenic treatment on the properties of amorphous alloys were studied in this paper. In this paper, Fe78Si9B13 amorphous strip was prepared by single roll rapid cooling method, which was used as the research object. The samples were annealed and cryogenic, and the magnetic properties of the alloy were tested by silicon steel tester and vibrating sample magnetometer. The main conclusions are as follows: (1) Fe78Si9B13 amorphous alloy prepared under three superheat conditions and treated by cryogenic treatment for 12 h or 24 h. After 48h and 96h, the samples were completely amorphous by XRD. The increase of superheat and the prolongation of cryogenic time are beneficial to increase the width of supercooled liquid zone and increase the thermal stability of amorphous alloy.) with the increase of superheat, the glass transition temperature Tg and the crystallization start temperature Tx are improved. First, the peak temperature of the crystallization peak is TP _ 1 ~ (2). And the crystallization enthalpy 螖 H obtained by the area integral of the two peaks shows a decreasing trend, and the increase of superheat will lead to the decrease of the performance stability and saturation magnetic induction intensity of amorphous strip, and the increase of coercivity and remanence magnetic field. With the increase of liquid nitrogen cryogenic treatment time, the crystallization peak area of Fe78Si9B13 amorphous alloy increases and the crystallization volume fraction decreases. The saturation magnetic induction intensity increases and Bs changes between quenched state and annealing treatment of 360-653K. Both T _ (g) T _ (x) and 螖 T _ (x) T _ (1. 2) change. And the width of supercooled liquid zone is higher than that of quenched sample. 4) after cryogenic treatment, the fracture will not occur in 180 掳fold of alloy sample, and the toughness increases compared with that before cryogenic treatment. With the prolonging of cryogenic time, the toughness of strip increases.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG139.8;TG156.91

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