取向硅钢极薄带试制工艺分析

Analysis of trial manufacture process of ultra-thin grain oriented silicon steel strips

以一种市售高磁感取向硅钢成品为原料,经一次法试制出了0.10mm规格取向硅钢极薄带,分别通过3种方案进行退火并取样分析,结果表明:1)随炉升温700℃均热退火可获得综合磁性较好的再结晶Goss织构,能满足JEM 1239标准要求;2)低、中温预热+1 150℃均热只能获得位向散漫、低强度的η或近η类等再结晶织构,磁感极低;3)快速加热在1 000℃以下均热能形成具有较高磁感的{110}〈001〉再结晶织构,在1 150℃以上均热,能形成具有较低高频铁损的弱的近{110}〈001〉再结晶织构,有深入研究价值;4)升温速度对再结晶晶粒均匀度有明显影响,快速升温推高初次再结晶温度,并可得到较低的高频铁损;5)对市售取向硅钢成品原料的纯化处理有进一步纯化钢质的作用,没有明显改善磁性能。

Using a commercial high-induction grain-oriented silicon steel product as raw material, the ultra-thin sheets with the thickness of 0. 1 mm were trail manufactured by once- through method. And three different annealing methods were adopted and samples were prepared and analyzed. The results showed that： 1）recrystallization Goss texture with higher general magnetic properties could be obtained through heating together with furnace up to 700 ℃ and soak annealing. The magnetic properties satisfied with JEM1239 standards; 2） 71 type or near 7} type of recrystallization texture with diffuse phase and low strength could be gained through low-medium temperature preheating and 1 150 ℃soaking, and the magnetic flux density was very low; 3） { 110} 〈001 〉 recrystallization texture with high magnetic flux density could be got through flash heating and soaking under 1 000 ℃, and the weak near {110} 〈001〉 recrystallization texture with lower high-frequency core loss might be achieved through soaking above 1 150 ℃, which was worthy of being deeply researched; 4） heating rate apparently influenced homogenization degree of recrystallization grain, and through increasing primary recrystallization temperature with higher heating rate, lower high-frequency core loss could be gained; 5） the steel quality of the commercial grain-oriented silicon steel product could be further purified after purification annealing, but magnetic properties were not apparently improved.