Page 58 - 理化检验-物理分册2024年第十期

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试验与研究 DOI:10.11973/lhjy-wl240153

热轧加热时间对 1.8%Si 无取向硅钢电磁性能和

夹杂物的影响

王思琴，高兴健，雷志亮
（宝钢湛江钢铁有限公司，湛江 524076）

摘 要：对比了1.8%Si无取向硅钢在不同加热时间下的电磁性能，分析了其显微组织和夹杂物
的变化规律。结果表明：热轧加热炉加热时间长的试样铁损劣化0.43 W/kg，这主要是因为试样中
存在大量尺寸小于1 μm、形状不规则的AlN夹杂钉扎在晶界，导致晶粒无法正常长大，晶粒组织细
小且不均匀；试样长时间处在1 000~1 120 ℃的加热炉中，促使大量AlN在板坯中均匀固溶，在轧制
和冷却过程中，AlN以弥散细小态析出并遗传到冷卷中，在硅钢机组连续热处理过程中，温度达到
950 ℃以上，AlN再次固溶后以弥散细小形态析出；对于正常加热时间的试样，即使在加热炉均热段
温度较高的情况下，由于AlN未来得及均匀地固溶在板坯的各个位置，在轧制和冷却过程中AlN以
簇拥态析出，夹杂物主要为尺寸相对较大的AlN、CaS-Al 2 O 3 、AlN-CaO-Al 2 O 3 复合夹杂，电磁性能良好。
关键词： 无取向硅钢；电磁性能；显微组织；加热时间；夹杂物；氮化铝；固溶
中图分类号：TB31；TG115.2 文献标志码：A 文章编号：1001-4012(2024)10-0042-05
Effect of hot rolling heating time on electromagnetic properties and inclusions of

1.8%Si non-oriented silicon steel

WANG Siqin, GAO Xingjian, LEI Zhiliang

(Baosteel Zhanjiang Iron & Steel Co.,Ltd., Zhanjiang 524076, China)

Abstract: The electromagnetic properties of 1.8%Si non-oriented silicon steel with different heating time were
compared, the change rules of microstructure and inclusions were analyzed. The results show that the iron loss of the
sample with long heating time in the hot rolling furnace was 0.43 W/kg, which was mainly because there were a large
number of AlN inclusions with size less than 1 μm and irregular shape pinned at the grain boundary, which led to the
failure of grain growth and the fine and uneven grain structure. A large amount of AlN was uniformly dissolved in the
slab by heating furnace at 1 000~1 120 ℃ for a long time. In the process of rolling and cooling, AlN was precipitated in a
dispersed and fine state and inherited into the cold coil. In the continuous heat treatment process of silicon steel unit, when
the temperature reached above 950 ℃, AlN was precipitated in a dispersed and fine form after solid solution again. For
the samples with normal heating time, even in the case of high temperature in the soaking section of the heating furnace,
because AlN was not uniformly dissolved in each position of the slab, AlN was precipitated in a clustered state during
rolling and cooling. The inclusions were mainly AlN, CaS-Al O , AlN-CaO-Al O composite inclusions with relatively
2 3 2 3
large size, and the electromagnetic properties were good.
Keywords: non-oriented silicon steel; electromagnetic performance; microstructure; heating time; inclusion;
aluminum nitride; solid solution

无取向硅钢的主要磁性能为低铁损、高磁感，影 出相、晶粒尺寸和织构分布等。无取向硅钢的内部
响磁性能的因素有化学成分、有害元素、夹杂物、析 组织结构与生产工艺密切相关, 特别是在炼钢控制

水平达到一定稳定程度后, 热轧工艺对成品磁性能
收稿日期：2024-06-03
起着决定性作用, 控制好热轧工艺是改善无取向硅
作者简介：王思琴（1992—），女，本科，主要从事硅钢产品的工
艺设计和质量管理工作，1173992668@qq.com 钢磁性能的重要措施。关于热轧工艺对无取向硅钢
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