退火气氛对3.5%Si无取向硅钢氧化层和磁性能的影响

doi:10.13251/j.issn.0254-6051.2025.09.008

摘要/Abstract

摘要： 以Fe-0.1C-3.5Si无取向硅钢薄带为研究对象,经CO₂-CO气氛脱碳后,在不同气氛(Ar、Ar+H₂和H₂)下对其进行1200 ℃保温10 h退火处理,研究了退火气氛对其氧化层和磁性能的影响。结果表明,试验钢在H₂气氛下退火后,平均碳含量最低,说明H₂与薄带中C元素发生反应,使其碳脱除。Ar+H₂气氛下退火后,氧化层明显减薄,厚度仅2.98 μm,H₂气氛下退火后,氧化层消失,仅有少许细小SiO₂颗粒存在。3种气氛下退火后,薄带磁性能均达到高牌号无取向硅钢的磁性能要求(P_1.5/50≤4.00 W/kg、B₅₀≥1.8 T),其中纯Ar气氛下高温退火试样的磁性能最好,磁感应强度最高为2.087 T,铁损最低为1.979 W/kg。

关键词: 无取向硅钢, 碳含量, 磁性能, 氧化层, 退火气氛

Abstract: Effect of annealing atmosphere on oxide layer and magnetic properties of the steel strip of Fe-0.1C-3.5Si non-oriented silicon steel pre-decarburized in a CO₂-CO atmosphere, and then annealed at 1200 ℃ in atmospheres of Ar, Ar+H₂, and H₂,respectively, for 10 h was investigated. The results show that the average carbon content of the steel is the lowest after annealing in H₂ atmosphere, indicating that H₂ reacts with the C element in the thin strip to remove its carbon. After annealing in Ar+H₂ atmosphere, the oxide layer is significantly reduced in thickness to only 2.98 μm. After annealing in H₂ atmosphere, the oxide layer disappears and only a few small SiO₂ particles exist. After annealing in three different atmospheres, the magnetic properties of the thin strip meet the requirements of high-grade non oriented silicon steel (P_1.5/50≤4.00 W/kg, B₅₀≥1.8 T). Among them, the magnetic properties of the high-temperature annealed specimen in pure Ar atmosphere are the best, with the highest magnetic induction intensity of 2.087 T and the lowest iron loss of 1.979 W/kg.

Key words: non-oriented silicon steel, carbon content, magnetic properties, oxide layer, annealing atmosphere

中图分类号:

TG156

钱娜, 艾立群, 洪陆阔, 周美洁, 孙伶艳, 佟帅. 退火气氛对3.5%Si无取向硅钢氧化层和磁性能的影响[J]. 金属热处理, 2025, 50(9): 47-53.

Qian Na, Ai Liqun, Hong Lukuo, Zhou Meijie, Sun Lingyan, Tong Shuai. Effect of annealing atmosphere on oxide layer and magnetic properties of 3.5%Si non-oriented silicon steel[J]. Heat Treatment of Metals, 2025, 50(9): 47-53.

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