采用Nb对Fe－6.5%Si(质量分数)高硅钢进行微合金化处理, 结果表明:Nb在高硅钢薄板制备过程中细晶效果明显.铸态、锻态和热轧态组织的晶粒分别细化了17.50%, 24.51%和30.13%.铸态样品压缩强度由1365 MPa提高至1520 MPa, 延伸率提高77.78%; 温轧板试样室温拉伸强度由573 MPa提高至621 MPa,延伸率提高44.44%. 利用XRD对厚度为0.30－1.68 mm的温轧板的板面织构演变过程进行跟踪测量, 结果发现:初始织构以(011)<100>Goss织构为主, 单道次变形量为26.2%的情况下,Goss织构完全转化为(100)<011>旋转立方织构, 随后,在单道次变形为22.6%的情况下, 旋转立方织构完全转化为{111}面织构,即纤维织构, 并稳定保持至0.30 mm.

Fe－6.5%Si (mass fraction) alloy possess perfect magnetic properties,though intermetallics of Fe₁₄Si₂ phase brought 6.5%Si leads to room temperature brittleness and hinder this significant materials industrialization. Nb was adopted into micro－alloying of Fe－6.5%Si high silicon steel. OM, thermal simulated test machine and XRD were employed to study the influence of Nb on high silicon steel in processing stages. Textures of warm－rolled high silicon steel strips were determined by XRD. The results indicate that Nb could refine the grains during fabrication of high silicon steel. Comparing to the non－Nb micro－alloyed high silicon steel, the grain size were reduced 17.50%, 24.51% and 30.13% in as－cast, forged and hot－rolled microstructure. Compression strength of as－cast specimen was enhanced from 1365 MPa to 1520 MPa with elongation rate from 0.225% to 0.400%. Tensile strength of warm－rolled strip was increased from 573 MPa to 621 MPa with elongation rate from 0.018% to 0.026%. XRD was carried out to indicate the surface texture evolution of warm－rolled high silicon steel with thickness from 0.30－1.68 mm during the warm rolling. The original (011)<100> Goss texture totally transformed to (100)>011> rotating cubetexture with single pass deformation of 26.2%. Then, rotating cube texture completely transformed to {111} fiber texture which remains until the thickness of 0.30 mm with single pass deformation of 22.6%.