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Duan F.-M.,University of Science and Technology Beijing | Kong X.-H.,University of Science and Technology Beijing | Hu S.-T.,Chinese National Silicon Steel Engineering Research Center | Quan J.-F.,University of Science and Technology Beijing | Shen K.,University of Science and Technology Beijing
Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing | Year: 2010

An anti-oxidation coating, mainly composed of MgO and Cr 2O 3, was prepared by a mixing method. XRD and SEM were used to study the difference of mass increment, oxidative products and element distribution between samples with and without coatings at 1400°C. The results show that the coatings are environmental-friendly and cost effective and also have good effect on grain-oriented silicon steel, with a wide range of anti-oxidation applications.


Hu S.-T.,University of Science and Technology Beijing | Hu S.-T.,Chinese National Silicon Steel Engineering Research Center | Kong X.-H.,University of Science and Technology Beijing | Yang H.,Chinese National Silicon Steel Engineering Research Center | And 2 more authors.
Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | Year: 2011

Surface microstructure of Mg 2SiO 4 coatings formed on the surface of oriented silicon steel coated with different kinds of MgO was investigated by XRD and SEM. The reaction mechanism between MgO and SiO 2 was analyzed by TG-DSC and thermodynamic calculation. Results revealed that when the MgO with finer microstructure size and higher activity is employed, a dense Mg 2SiO 4 layer with finer microstructure and good binding to the steel substrate can be obtained. The results are very helpful for the preparation of oriented silicon steel.


Hu S.-T.,University of Science and Technology Beijing | Hu S.-T.,Chinese National Silicon Steel Engineering Research Center | Kong X.-H.,University of Science and Technology Beijing | Wang X.-X.,Chinese National Silicon Steel Engineering Research Center | And 4 more authors.
Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | Year: 2010

In order to prepare grain oriented silicon steel with low iron loss, the influence of surface treatment on iron loss of grain-oriented silicon steel was studied, and in which the hysteresis loss and abnormal eddy loss were discussed in detail. The results show that iron loss of the oriented silicon steel can be decreased by 22% after chemical polish compared with the substrate and subsequent TiN ceramic coating. When chemical polish technology is adopted, hysteresis loss decrease by 28%, but abnormal eddy loss deteriorate by 15%. When the groove forming technology is adopted before the preparation of ceramic coating, abnormal eddy loss improves by 40% and hysteresis loss deteriorate by 5%.

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