摘要
采用双辊薄带连铸工艺试制了2.6 mm厚5.28%Si-1.11%Al高硅钢薄带,对比了1050℃×5 min正火及不正火铸带280℃冷轧至0.5 mm后,再经900～1100℃退火的磁性能。结果表明,高硅钢铸带显微组织为等轴晶组织,正火后铸带边部晶粒长大,中心层晶粒变化较小。成品中析出物主要为较粗大的AlN和AlN+MnS复合析出物,尺寸为0.5～2.5μm。与不正火试样相比,正火试样成品铁损大幅降低,磁感小幅下降;随退火温度的升高,两种工艺下铁损和磁感都是先降低后升高,在1050℃出现最低值。
2.6 mm thickness 5.28%Si-1. 11%Al non-oriented high silicon steel was produced by twin roll thin strip casting. Magnetic property of the strip un-normalized and normalized at 1050 ℃ ×5 min was contrasted after cold rolled to 0.5 mm at 280 ℃ and 900-1100 ℃final annealing. The results show that microstructure of the strip is equiaxed crystal. The surface grain is coarsened and the center layer grain has little change of the normalized strip. The main precipitates are A1N and MnS ＋ A1N with 0.5-2.5 μm size. Compared with unnormalized specimen, the iron loss of normalized specimen fall considerably and magnetic flux density decline slightly. The iron lose and magnetic flux density of the sheet decrease at first and then increase as annealing temperature increase, both specimens annealed at 1050℃ has the lowest point.
出处
《金属热处理》
CAS
CSCD
北大核心
2013年第6期58-62,共5页
Heat Treatment of Metals
基金
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项目(50934009)
