The invention belongs to the technical field of soft magnetic material preparation, and specifically relates to a base material without bottom orientation and its preparation method. The raw material composition of the base material is C:0.035-0.075%, Si:2.8-3.4%, Cu:0.20-0.45%, Sn:0.1-0.2%, Als:0.02%-0.03%, S:0.015-0.03%, Mn:0.04-0.08%, N:0.005-0.01%, Sb:0.03-0.09%, and the remainder. It's Fe. The preparation method includes: continuous casting, hot rolling, normalization, acid pickling, cold rolling, decarbonization annealing, coating isolation layer, high temperature annealing and moisture-proof treatment steps. By improving the composition of silicon steel substrate, isolator, hot rolling temperature, decarbonization and high temperature annealing, the original base material with fine and uniform secondary recrystallization grains and accurate orientation is obtained. The base material has no insulating bottom layer. It can be directly used for the preparation of ultra-thin oriented silicon steel strips without pickling because of its fine grains. The ultra-thin strips made from this base material have excellent iron loss and magnetic inductive properties, low preparation cost and high production efficiency.
【技术实现步骤摘要】
一种无底层取向超薄带母材及其制备方法
本专利技术属于软磁材料制备
,具体涉及一种无底层取向超薄带母材及其制备方法。
技术介绍
取向硅钢超薄带是指厚度≤0.1mm的含3wt%Si的{110}<001>取向硅钢,主要服役于中频工况,可用于制备直流换流阀阳极饱和电抗器铁心,是电力电子工业中的重要材料。目前,超薄取向硅钢带通常以取向硅钢成品为原料制取,取向硅钢可分为两类,一类为普通取向硅钢(CGO),一类为高磁感取向硅钢(Hi-B)。我国取向硅钢的数量、质量、规格还不能满足电力工业发展的需求,因此对于取向硅钢生产工艺的改进十分重视。中国专利申请CN107988472A公开了一种节能的高磁感取向硅钢生产方法,步骤为:冶炼并连铸成坯后加热;热轧、卷取;进行两段常化退火;冷轧;碱洗后脱碳退火;渗氮退火;涂覆高温退火隔离剂MgO;按照T0=1064-40×A+5.85×105×Als公式确定二次再结晶温度T0:根据二次再结晶温度T0进行不同温度阶段变换气氛的高温退火;进行后工序。该工艺在很大程度上缩短了高温退火升温过程的时间,节约了能耗,并且涂覆的隔离剂MgO会在高温退火过程中发生化学反应,生成二次再结晶晶粒起到钉扎作用的硅酸镁底层,可以防止钢带黏连,促进脱硫、脱氮反应,改善成品磁性。但是因为CGO或Hi-B成品钢带在制备过程中涂覆了隔离层,将其作为母材生产超薄硅钢带材时需要进行酸洗,工业上主要采用Littmann方法制备超薄硅钢带材,即以厚规格成品取向硅钢带材为母材,经再次冷轧和退火制备得到,其基本原理为:3%Si的(110)[001] ...
【技术保护点】
1.一种超薄带母材,其特征在于,以质量百分比计,其原料组成为:C:0.035~0.075%,Si:2.8%~3.4%,Cu:0.20~0.45%,Sn:0.1~0.2%,Als:0.02%~0.03%,S:0.015~0.03%,Mn:0.04~0.08%,N:0.005~0.01%,Sb:0.03~0.09%,余量为Fe。
【技术特征摘要】
1.一种超薄带母材,其特征在于,以质量百分比计,其原料组成为:C:0.035~0.075%,Si:2.8%~3.4%,Cu:0.20~0.45%,Sn:0.1~0.2%,Als:0.02%~0.03%,S:0.015~0.03%,Mn:0.04~0.08%,N:0.005~0.01%,Sb:0.03~0.09%,余量为Fe。2.根据权利要求1所述的超薄带母材,其特征在于,以质量百分比计,其原料组成为:C:0.035~0.075%,Si:2.8%~3.4%,Cu:0.25~0.45%,Sn:0.1~0.2%,Als:0.02%~0.03%,S:0.015~0.03%,Mn:0.04~0.08%,N:0.005~0.01%,Sb:0.03~0.08%,余量为Fe。3.一种无底层取向超薄带母材的制备方法,包括连铸、热轧、常化、冷轧、脱碳退火、涂覆隔离剂和高温退火的步骤,其特征在于,所述无底层取向超薄带母材为权利要求1或2所述的超薄带母材。4.根据权利要求3所述的制备方法,其特征在于,以质量百分比计,涂覆的隔离剂组成为:Al2O375~90%,MgO3%~10%,SiO22%~8%,余量为硅酸盐。5.根据权利要求3所述的制备...
【专利技术属性】
技术研发人员:高洁,杨富尧,何承绪,刘洋,程灵,吴雪,马光,韩钰,陈新,
申请(专利权)人:全球能源互联网研究院有限公司,
类型:发明
国别省市:北京,11
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