摘要:
以B35AV1900无取向硅钢为对象, 研究了小幅度变形情况下, 硅钢内部磁畴组织和磁性能的变化规律。采用软磁交/直流测试仪、Bitter粉纹法、X-射线应力仪、显微硬度计等分析手段, 获取了不同弯曲形变下磁畴形貌、弯曲应力、硬度的变化和磁性能的影响规律。结果表明:随弯曲角度增大, 硅钢交直流性能呈现明显下降趋势, 在0°变化到18°时, 硅钢损耗上升了23.2%, 矫顽力增大, 磁导率、剩余磁感应强度减小;弯曲应力随变形角度增大而增大, 其硬度也呈现略微上升趋势;随变形角度增大, 磁畴种类增多, 相邻磁壁之间间距和磁壁宽度均缩小。
关键词:
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无取向硅钢 /
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弯曲形变 /
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磁性能 /
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磁畴 /
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硬度
Abstract:
The evolution of magnetic domain and magnetic properties of B35 AV1900 non-oriented silicon silicon steel had been studied under the condition of small deformation amplitude in this paper.Soft magnetic ac/dc tester,bitter pattern,residual stresses the X-ray detector and hardness tester had been used to acquire the variation characteristics of magnetic domain structure,bending stress,hardness and the effect laws of magnetic properties.The results show that the ac/dc performances of the silicon steel have been significantly worsen as the bending angle increases.When the bending angle is increased from 0° to 18°,iron loss of silicon steel deteriorates by 23.2%,coercive force increases,magnetic permeability and residual magnetic induction intensity decreases.The bending stress increases with the angle,hardness of the silicon steel also shows a slight increase.At the same time,when the deformation increases,the kinds of magnetic domain increases,magnetic wall width and the spacing between adjacent magnetic wall become narrow as well.
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