普通冷轧取向硅钢中间完全脱碳退火工艺的确定

Determination of Intermediate Complete Decarburizing Annealing Process of Common Grain-Otiented Silicon Steel

为了确定普通冷轧取向硅钢最优的中间完全脱碳退火工艺,在其一次冷轧后进行5种不同工艺的脱碳退火处理,借助扫描电镜及电子背散射衍射技术研究了不同工艺脱碳退火后的组织、织构和脱碳效果。结果表明:经5种工艺脱碳退火处理后,初次再结晶的平均晶粒尺寸均约为19μm,且不随退火温度和时间的变化而变化;经840℃×10min工艺退火后的晶粒最均匀,高斯织构位向更准确,高斯织构面积分数最多,为3.1%,可将碳脱至0.003 5%。

In order to determine the optimal intermediate complete decarburizing annealing processes for common grain-oriented （CGO） silicon steel, five kinds of intermediate decarburizing annealing processes were conducted, the microstructure, texture and decarbonization after different deearburizing annealing processes were studied by scanning electron microscopy and electro back-scattered diffraction （EBSD） technology. The results show that the average grains sizes of primary recrystailization were about 19 tam after five kinds of decarburizing annealing processes treatment, and them hardly varied with annealing temperature and time. The grains size was most uniform after annealing at 840℃ for 10 min, the Goss texture orientation annealing was more accurate and the area frction of Goss texture was most, and up to 3.1%. The process of 840 ℃ X 10 min could decarbonize to 0. 003 5wt%.