双辊薄带连铸1.7%Si无取向硅钢组织与织构  

Microstructure and texture of strip-cast 0.7% Si non-oriented silicon steel

作　　者：马良[1] 薛艳春[1] 赵烁[1] 闫涛[1] 薛涛[1] 张喜亮[1] 

机构地区：[1]河北工程大学装备制造学院,河北邯郸056038

出　　处：《材料热处理学报》2016年第5期52-56,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51501052);河北省青年科学基金(E2015402094)

摘　　要：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.

关 键 词：薄带连铸 织构 储能 无取向硅钢 

分 类 号：TG142.77[一般工业技术—材料科学与工程]