Inhomogeneous Distribution of Second Phase Particles in Grain Oriented Electrical Steels  

作　　者：Yang Li Weimin Mao Ping Yang 

机构地区：[1]Department of Materials, University of Science and Technology Beijing, Beijing 100083, China [2]State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing100083, China

出　　处：《Journal of Materials Science & Technology》2011年第12期1120-1124,共5页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 50871015)

摘　　要：The second phase particles were observed during the whole manufacturing process of conventional grain oriented electrical steels, exhibiting that the areal density of particles in the center was obviously higher than that on the surface at each manufacturing stage. After hot rolling, the approximately equiaxed grains formed upon recrystallization were present on the sheet surface while the deformation structures were retained in the central part. Thus, the dislocation density on the surface was evidently lower than that in the center and this trend became more noticeable after the first cold rolling. Since new precipitates were mainly nucleated at dislocations during both hot rolling and annealing following cold deformation, the difference in dislocation density resulted in the inhomogeneous distribution of particles through the thickness of sheet. According to this, Goss grains, which were usually found near the surface, tended to grow up more easily during the secondary recrystallization treatment.

关 键 词：Grain oriented electrical steel PRECIPITATION RECRYSTALLIZATION DISLOCATION 

分 类 号：TB[一般工业技术]