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Morphologies and Influential Factors of Forsterite Film in grain-Oriented Silicon Steel

Journal of Iron and Steel Research International 2013年第11期20卷 105-110页

作者： FU Yong-jun JIANG Qi-wu WANG Bao-chuan YANG Ping JIN Wen-xu School of Materials Science and Engineering University of Science and Technology Beijing Anshan Steel Co. Ltd.Cold Rolling Silicon Plant

The product quality of graiworiented silicon steel may be affected by each process because of its complicat- ed production technology. Morphologies, compositions and structures of forsterite film formed in different conditions on the samples subjected to high temperature annealing were measured by using a scanning electron microscope, an energy disperse spectroscope, an X ray diffractometer and Fourier transform infrared technique respectively. The morphologies and influential factors of forsterite film were investigated. The results showed that the major compo- nent of forsterite film composed of light-gray spherical particles was Mg2 SiO4, and the minor was MgAl2O4. If the amount of MgO coated on the surface of the steel was less, bare holes or even large-scale bare grains for forsterite film appeared. The higher temperature of water bath during decarburization annealing led to gaps of strips in forster ite film. Moreover, MgO coating method had great influence on forsterite film. Roller coating method was beneficial to increase compactness and smoothness of forsterite film, but was disadvantageous to its thickness.

关键词： grain-oriented silicon steel forsterite film bare grain

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