20mm薄板坯试制高牌号无取向硅钢的组织性能研究  

Study on Structure and Property of High Grade Non-Oriented Silicon Steel Sheet via 20 mm Thin Slab

作　　者：薛艳春[1] 马良[1] 仇圣桃[2] 

机构地区：[1]河北工程大学装备制造学院,河北邯郸056038 [2]钢铁研究总院连铸中心,北京100081

出　　处：《钢铁钒钛》2015年第3期116-121,共6页Iron Steel Vanadium Titanium

基　　金：河北省青年科学基金(E2015402094)

摘　　要：采用薄板坯工艺制备了厚度为20 mm的2.9%Si-0.77%Al无取向硅钢铸坯,经热轧、常化、冷轧、退火后,对其显微组织、析出物、磁性能进行了检测分析,结果表明：铸带为穿晶组织,热轧板表层为细小的再结晶晶粒,中心层为粗大的变形晶粒,热轧板常化后再结晶完全,成品板为等轴晶组织。成品析出物主要是Al N和（Mn S＋Al N）复合析出物,尺寸较粗大,为0.5~2.5μm。成品磁性能为P15=2.86 W/kg,B50=1.70 T。2. 9% Si- 0. 77% Al non-oriented silicon steel slab had been produced by the thin slab process with a thickness of 20 mm. After hot rolling,normalizing,cold rolling and annealing,the resulting sheet had been investigated in terms of microstructure,precipitates and magnetic properties. The results show that thin casting slab has a typical transcrystalline grain structure,while the structure of hot rolled strip comprising of fine recrystallized grain at edge and coarse deformed structure in the center. Normalizing process leads to a fully-recrystallized microstructure,and finished sheet is characterized by an equaixed grain microstructure. The precipitates are dominant coarse Al N and（ Mn S ＋ Al N） composite in size of 0. 5~ 2. 5 μm. The magnetic property of resulting silicon steel are P15= 2. 86 W / kg and B50= 1. 70 T.

关 键 词：薄板坯 组织 析出物 无取向硅钢 

分 类 号：TG142.1[一般工业技术—材料科学与工程]