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采用电子背散射衍射仪(EBSD)分析了Nb对取向硅钢热轧板、中间退火板、脱碳退火板及高温退火板的厚度方向晶粒尺寸、织构类型及体积分数的影响。结果表明,取向硅钢中添加Nb元素,得到纳米级NbCN与MnS与Cu_2S复合析出相,热轧板、中间退火与脱碳退火板晶粒细化。含Nb取向硅钢热轧板表层与次表层含有较高体积分数的{110}<001>Goss织构,热轧板中心层与脱碳退火板含有较高含量的γ纤维织构{111}<112>和{111}<110>。含Nb取向硅钢高温退火后Goss织构体积分数达到74.6%,而不含Nb取向硅钢Goss织构体积分数只有39.7%。
The influence of Nb on grain size, texture type and volume fraction in thickness direction of oriented hot-rolled silicon steel, intermediate annealing plate, decarburization annealing plate and high-temperature annealing plate was analyzed by electron backscatter diffraction (EBSD). The results show that the addition of Nb to the oriented silicon steel can result in the grain refinement of nanocrystalline NbCN, MnS and Cu_2S composite precipitates, hot-rolled sheets, intermediate annealing and decarburization annealed sheets. The {110} <001> Goss texture with high volume fraction in the surface and subsurface layers of the Nb-oriented silicon steel hot-rolled sheet has a higher content of γ-fiber {111} 112> and {111} <110>. The Goss texture volume fraction of high temperature annealed Nb-oriented silicon steel reaches 74.6%, while the non-Nb-oriented silicon steel Goss texture volume fraction of only 39.7%.