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取向硅钢的表面质量(包括底层质量,内氧化层以及表面氧化)对铁损会有明显的影响,但各因素对铁损的影响程度和影响机理仍不清楚。通过轻酸洗去掉外氧化层比较酸洗前后铁损变化,酸洗去掉底层比较去掉底层前后铁损的变化,抛光去掉底层及内氧化层比较抛光前后铁损的变化来研究表面质量各因素对铁损的影响。发现表面氧化对铁损没有明显影响,内氧化层对铁损影响最大。用扫描电镜分析内氧化层的形貌及成份发现内氧化层是镁橄榄石和尖晶石的离散质点。内氧化层通过其对180°畴壁移动的钉扎增加铁损,底层通过增加90°闭合畴的体积分数增加铁损。
The surface quality of the oriented silicon steel (including the quality of the bottom layer, the inner oxide layer and the surface oxidation) will have a significant effect on the iron loss, but the extent and influence of various factors on the iron loss are still not clear. By light pickling to remove the outer oxide layer compared before and after pickling changes in iron loss, pickling remove the underlying comparison to remove iron loss before and after the bottom change, polished and remove the underlying and inner oxide layer compared before and after the iron loss changes to study the surface quality of the various factors Effect of iron loss. It was found that the surface oxidation had no obvious effect on the iron loss, and the inner oxide layer had the greatest influence on the iron loss. Scanning electron microscopy analysis of the morphology and composition of the inner oxide layer was found to be the inner oxide layer of forsterite and spinel discrete particles. The inner oxide increases iron loss through its pinning of 180 ° domain wall movement, and the bottom increases iron loss by increasing the volume fraction of 90 ° closed domains.