| 薄板坯连铸连轧工艺下Hi-B钢的组织及织构 |
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| 作者姓名： | 肖丽俊 王海军 项利 付兵 仇圣桃 |
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| 作者单位： | 钢铁研究总院连铸技术国家工程研究中心,北京,100081;钢铁研究总院连铸技术国家工程研究中心,北京,100081;钢铁研究总院连铸技术国家工程研究中心,北京,100081;钢铁研究总院连铸技术国家工程研究中心,北京,100081;钢铁研究总院连铸技术国家工程研究中心,北京,100081 |
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| 基金项目： | 国家自然科学基金委员会与上海宝山钢铁股份有限公司联合资助项目(50934009) |
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| 摘 要： | 采用金相显微镜和扫描电镜研究实验室模拟薄板坯连铸连轧（TSCR）工艺试制的高磁感取向硅钢（Hi-B钢）组织、织构的演变特征.研究发现实验室模拟薄板坯连铸连轧工艺试制的Hi-B钢热轧板显微组织及织构在厚度方向上存在不均匀性.常化板表面脱碳层铁素体晶粒明显粗化,常化板织构基本继承了热轧板相应的织构类型,仅织构强度不同.一次大压下率冷轧后,晶粒及其晶界沿轧向被拉长形成鲜明的纤维组织,织构主要为α纤维织构和γ纤维织构,脱碳退火后试样发生回复和再结晶现象并形成初次晶粒组织,脱碳退火后织构分布较为集中.温度升高至1000℃时二次再结晶开始,1010℃时钢中晶粒发生异常长大,高斯织构强度达到61.779.成品磁感为1.915 T,铁损为1.067 W·kg-1.
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| 关 键 词： | 硅钢 薄板坯连铸连轧(TSCR) 微观组织 织构 |
| 收稿时间： | 2014-10-15 |
Microstructure and texture of Hi-B steel produced by TSCR process |
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| Affiliation: | National Engineering Research Center of Continuous Casting Technology, Central Iron and Steel Research Institute, Beijing 100081, China |
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| Abstract: | The microstructure and texture evolution of Hi-B steel produced by thin slab casting and rolling (TSCR) process in the laboratory was studied by metalloscopy and scanning electron microscopy. It was found that the microstructure and texture of the hot rolling slab of Hi-B steel, which was manufactured by simulated TSCR process in the laboratory, was inhomogeneous along the thickness direction. Ferrite grains in the surface decarbonization layer of the normalizing slab obviously coarsen; moreover, the texture of the normalizing slab inherited the texture type of the hot rolling slab, with only a difference in texture density. After cold roiling with big reduction rate, the coarse grains and grain boundaries were stretched to be fibrous bands in the rolling direction, and the α fiber texture and the γ fiber texture were the main texture style. With the deearburizing annealing carrying out, the recovery and reerystallization of the cold rolling slab occurred, primary recrystallization grains formed, and the texture was more centrally distributed. When the temperature increased to 1000℃, secondary recrystallization appeared; at 1010℃ the Goss grains grew up, and the Goss texture intensity reached to 61. 779. By testing, the products had a magnetic induction of 1. 915 T and an iron loss of 1. 0671 W.kg-1. |
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