HiB与CGO取向硅钢的对比及其常化退火工艺

Comparison of HiB and CGO orientation silicon steels and its normalizing annealing process

从化学成分体系、生产工艺流程等角度详细分析了一般取向硅钢(CGO钢)和高磁感取向硅钢(HiB钢)的主要区别,并开展了HiB钢常化退火工艺的实验室研究和工业化试制。结果表明,由CGO钢转型生产HiB钢的难点主要是常化退火工艺的制定。实验室常化退火最优工艺为退火温度1120℃,退火时间4 min,空冷温度900℃。HiB钢热轧和常化退火后的显微组织类型均为铁素体,HiB钢常化退火后的显微组织主要是沿轧制方向分布的再结晶晶粒。工业化试制HiB钢常化退火后的主要织构类型为高斯织构{110}<001>及铜型织构{112}<111>。

Main differences between common oriented silicon steel(CGO)and high magnetic induction oriented silicon steel(HiB)were analyzed in detail from the perspective of chemical composition system and production process,and the laboratory research of normalizing annealing process and industrial trial production of the HiB steel were carried out.The results show that the main difficulty in transforming the production of the CGO steel to the HiB steel is the formulation of normalizing annealing process.The optimal laboratory normalizing annealing process of the HiB steel is the annealing temperature of 1120℃,annealing time of 4 min,and air cooling temperature from 900℃.The microstructure of the HiB steel after hot rolling and normalizing annealing is ferrite,and the microstructure after normalized annealing is mainly recrystallized grains distributed along the rolling direction.The main texture types of the industrial trial⁃produced HiB steel after normalizing annealing are Goss texture{110}<001>and copper texture{112}<111>.