采用双辊薄带连铸工艺试制了1.7％ Si无取向硅钢铸带,并采用光学显微镜及电子背散射衍射(EBSD)技术研究了其在铸轧及随后的冷轧和退火过程中的组织和织构演变特征.结果表明:铸带表层至中间层为粗大的等轴晶粒,中心层为细小的等轴晶.铸带织构为强的< 100>∥ND织构,铸带冷轧后的冷轧组织中存在大量剪切带,冷轧织构由强的<110 >//RD和较弱的<111 >//ND织构组成.冷轧板经900℃退火后出现强的{001} <130>再结晶织构,再结晶织构的形成可以解释为择优形核和晶粒的择优长大机制.
Fe-1.7％ Si steel strip was produced by a vertical type twin-roll strip caster.The evolution of microstructure and texture of the steel strip was investigated by optical microscope and electron backscattered diffraction (EBSD) technique.The results show that the ascast strip has large equiaxed grains in the surface to the middle layer,and small equiaxed grains in the center layer,and the texture of the as-cast strip is strong < 100 >//ND texture.A large amount of shear bands is observed in the cold rolled sheet,and the texture consists of strong < 110 >//RD and weak < 111 >//ND texture.Strong { 001 } < 130 > recrystallization textures can be formed in the cold rolled sheet after annealing at 900 ℃.The recrystallization texture can be explained by favored nucleation and grain growth mechanism.
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