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本文考察了经硼及铬锰微合金化后的Sendust微晶带的动态磁性能,有效磁导率μ_e、铁损P和品质因数Q值随频率f和磁感应强度B的变化特性。μ_e随f的增加而下降,当f>100 kHz时下降趋于平缓。不同的B值对μ_e的影响极小。P随f增大而增加,可表示为P∝f~α,α=1.1～1.3,P还随B增强而增加。与原始Sendust合金相比,微合金化后薄带的μ_e随f增加而降低的速率以及P随f增加而上升的速率都较小,这一改善与合金元素添加后引起的有序度降低,电阻率增加有关。此外,品质因数Q对B不敏感,仅随f而变化,在f=100 kHz时达到极小值,这可能是由于尺寸共振和磁力共振引起的频散及共振吸收所致。
In this paper, the dynamic magnetic properties, effective magnetic permeability μ_e, iron loss P and quality factor Q value with frequency f and magnetic induction B of the micro-alloyed Sendust after boron and chromium-manganese were investigated. μ_e decreases with increasing f, and decreases slowly with f> 100 kHz. Different values of B have minimal effect on μ_e. P increases with f and increases, can be expressed as Pαf ~ α, α = 1.1 ~ 1.3, P also increases with increasing B. Compared with the original Sendust alloy, the micro-alloyed strip μ_e decreases with increasing f rate and the rate of P increases with the increase of the rate is small, this improvement and alloying elements caused by the order of reduction, Resistivity increased. In addition, the quality factor Q is insensitive to B and varies only with f, reaching a minimum at f = 100 kHz, which may be due to the dispersion and resonance absorption caused by the dimensional and magnetic resonances.