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采用Fe-3%Si电工钢铸坯中长轴平行于轧向的不同数量柱状晶进行了冷变形及再结晶退火,采用EBSD分析技术对柱状晶织构的转变行为进行了研究.结果表明,原始柱状晶为立方取向的单柱状晶时,大压下率一次冷轧及再结晶退火不利于立方织构的保留;小压下率二次冷轧及再结晶退火会形成强立方织构,该立方织构强烈阻碍Goss晶粒的异常长大;原始柱状晶为立方和Goss位向的双柱状晶时,大压下率冷轧条件下,Goss取向快速转向{111}<112>而有效地保留了立方取向,Goss和立方取向柱状晶之间的晶界没有强的交互作用;原始柱状晶为多种位向的多柱状晶时,柱状晶晶界能促进g织构及减少立方织构,有利于Goss晶粒异常长大.
The cold deformation and recrystallization annealing were carried out on different numbers of columnar grains with long axis parallel to the rolling direction in the Fe-3% Si electrical steel slab. The transformation behavior of the columnar grain structure was studied by EBSD analysis technique. When the original columnar crystals are single-columnar grains with cubic orientation, the primary cold rolling and recrystallization annealing at a large reduction ratio are not conducive to the preservation of the cubic texture. The secondary cold rolling and recrystallization annealing at a small reduction ratio form a strong cubic texture, The cube texture strongly hindered the Goss grain growth. When the original columnar crystals were cubic and Goss-oriented double-columnar crystals, Goss orientation was rapidly turned to {111} <112> under the condition of large reduction rate cold rolling. The cubic orientation is retained, and there is no strong interaction between the grain boundaries of Goss and the cubic oriented columnar crystals. When the original columnar crystals are multi-oriented multi-columnar crystals, the columnar grain boundaries can promote the g texture and reduce the cubic structure Structure, is conducive to abnormal Goss grain growth.